/* ===== CSS CUSTOM PROPERTIES ===== */
:root {
  --color-primary:      rgb(7, 102, 171);
  --color-primary-dim:  rgba(7, 102, 171, 0.7);
  --color-light:        rgb(134, 185, 201);
  --color-accent:       rgb(139, 38, 46);
  --color-bg:           #0d2340;
  --color-surface:      rgba(7, 102, 171, 0.12);
  --color-border:       rgba(134, 185, 201, 0.2);
  --color-border-hover: rgba(134, 185, 201, 0.5);
  --color-text:         #e8f4f8;
  --color-text-muted:   rgba(232, 244, 248, 0.6);
  --color-glow:         rgba(7, 102, 171, 0.35);
  --color-glow-strong:  rgba(7, 102, 171, 0.6);
  --font:               'Inter', sans-serif;
  --radius:             16px;
  --radius-sm:          8px;
  --header-h:           72px;
  --transition:         0.3s ease;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: var(--font); }

/* ===== PARTICLE CANVAS ===== */
#particle-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* ===== LAYOUT HELPERS ===== */
main { position: relative; z-index: 1; }

.page-section {
  display: none;
  min-height: 100vh;
  padding: calc(var(--header-h) + 60px) 80px 80px;
}
.page-section.active {
  display: block;
  animation: pageEnter 0.38s cubic-bezier(0.22, 1, 0.36, 1) both;
}
.page-section.page-leaving {
  display: block;
  animation: pageLeave 0.22s ease-in both;
  pointer-events: none;
}

@keyframes pageEnter {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes pageLeave {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(-14px); }
}

@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ===== GLASSMORPHISM CARD ===== */
.card {
  background: var(--color-surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.card:hover {
  border-color: var(--color-border-hover);
  box-shadow: 0 0 40px var(--color-glow);
  transform: translateY(-4px);
}

/* ===== SECTION HEADER ===== */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-title {
  font-size: 42px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary), var(--color-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}
.section-sub {
  color: var(--color-text-muted);
  font-size: 17px;
}

/* ===== GRIDS ===== */
.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Ürünler – 3-column showcase */
.grid-showcase {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* Referanslar – 4-column uniform */
.grid-mosaic {
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

/* Sertifikalar – 4-column uniform */
.grid-sert {
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

/* Featured product hero card (full-width, sits above grid) */
.product-featured {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  height: 400px;
  margin-bottom: 32px;
  display: flex;
  align-items: flex-end;
  cursor: pointer;
}
.product-featured-img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.product-featured:hover .product-featured-img { transform: scale(1.05); }
.product-featured-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13,35,64,0.92) 0%, rgba(13,35,64,0.4) 50%, transparent 100%);
}
.product-featured-body {
  position: relative;
  z-index: 1;
  padding: 36px 40px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  width: 100%;
  gap: 24px;
}
.product-featured-text { flex: 1; }
.product-featured-text .product-category-badge {
  margin-bottom: 10px;
}
.product-featured-text h2 {
  font-size: 30px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 10px;
}
.product-featured-text p {
  font-size: 15px;
  color: rgba(255,255,255,0.8);
  line-height: 1.6;
  max-width: 560px;
}
.product-featured-cta {
  flex-shrink: 0;
  padding: 14px 28px;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 8px;
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.5px;
  transition: background var(--transition), border-color var(--transition);
  align-self: flex-end;
  white-space: nowrap;
}
.product-featured:hover .product-featured-cta {
  background: rgba(7,102,171,0.6);
  border-color: var(--color-primary);
}

/* ===== SCROLL REVEAL ===== */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== FILTER BAR ===== */
.filter-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 36px;
}
.filter-btn {
  padding: 8px 20px;
  border-radius: 24px;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 500;
  transition: all var(--transition);
  background: var(--color-surface);
}
.filter-btn:hover,
.filter-btn.active {
  border-color: var(--color-primary);
  color: var(--color-text);
  background: rgba(7, 102, 171, 0.2);
  box-shadow: 0 0 12px var(--color-glow);
}

/* ===== BUTTON ===== */
.btn-primary {
  display: inline-block;
  padding: 12px 32px;
  background: linear-gradient(135deg, var(--color-primary), rgb(7,140,220));
  color: #fff;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  transition: opacity var(--transition), box-shadow var(--transition);
}
.btn-primary:hover {
  opacity: 0.9;
  box-shadow: 0 0 20px var(--color-glow-strong);
}
.btn-primary:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  box-shadow: none;
}

/* ===== HEADER ===== */
#site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 1000;
  background: #ffffff;
  border-bottom: 1px solid #e8edf2;
  box-shadow: 0 2px 16px rgba(0,0,0,0.07);
  transition: box-shadow var(--transition);
}
#site-header.scrolled {
  box-shadow: 0 4px 24px rgba(0,0,0,0.1);
}
.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  height: 100%;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo-link { display: flex; align-items: center; text-decoration: none; }
.logo-header {
  height: var(--header-h);
  width: auto;
  object-fit: contain;
  display: block;
}

#main-nav {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-link {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: #4b5563;
  position: relative;
  padding-bottom: 4px;
  transition: color var(--transition);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: width var(--transition);
}
.nav-link:hover { color: var(--color-primary); }
.nav-link.active { color: var(--color-primary); }
.nav-link.active::after,
.nav-link:hover::after { width: 100%; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: #374151;
  border-radius: 2px;
  transition: all var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== HERO ===== */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-h));
  text-align: center;
  gap: 20px;
  padding: 40px 0;
}
.hero-identity {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  animation: floatLogo 4s ease-in-out infinite;
}
.hero-icon {
  width: 72px;
  height: 72px;
  max-width: 72px;
  object-fit: contain;
  background: #fff;
  border-radius: 18px;
  padding: 8px;
}
.hero-company-icon {
  width: clamp(80px, 12vw, 140px);
  height: clamp(80px, 12vw, 140px);
  object-fit: contain;
}
.hero-company-name {
  font-size: clamp(72px, 14vw, 160px);
  font-weight: 900;
  color: #fff;
  letter-spacing: -2px;
  line-height: 1;
}
.hero-company-sub {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-light);
}
@keyframes floatLogo {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}
.hero-title {
  font-size: clamp(32px, 5vw, 64px);
  font-weight: 700;
  background: linear-gradient(135deg, #fff 30%, var(--color-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  min-height: 1.3em;
}
.cursor {
  -webkit-text-fill-color: var(--color-light);
  animation: blink 0.8s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero-sub {
  max-width: 640px;
  color: var(--color-text-muted);
  font-size: 17px;
  line-height: 1.7;
}
.hero-cta {
  display: inline-block;
  padding: 14px 36px;
  background: linear-gradient(135deg, var(--color-primary), rgb(7,140,220));
  color: #fff;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.3px;
  box-shadow: 0 0 24px var(--color-glow);
  transition: opacity var(--transition), box-shadow var(--transition), transform var(--transition);
}
.hero-cta:hover {
  opacity: 0.9;
  box-shadow: 0 0 40px var(--color-glow-strong);
  transform: translateY(-2px);
}
.scroll-arrow {
  font-size: 24px;
  color: var(--color-light);
  animation: bounce 1.5s ease-in-out infinite;
  margin-top: 8px;
}
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(8px); }
}

/* ===== STATS ===== */
.stats-bar {
  display: flex;
  justify-content: center;
  gap: 60px;
  padding: 52px 40px;
  background: rgba(255,255,255,0.035);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  margin: 0 0 56px;
}
.stat-item { text-align: center; }
.stat-number {
  font-size: 54px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}
.stat-suffix { font-size: 36px; font-weight: 700; color: var(--color-light); }
.stat-label {
  display: block;
  margin-top: 8px;
  color: var(--color-text-muted);
  font-size: 15px;
  letter-spacing: 0.5px;
}

/* ===== ABOUT CARD ===== */
.about-card {
  max-width: 700px;
  margin: 0 auto;
  padding: 40px;
  text-align: center;
}
.about-card h2 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-light);
}
.about-card p {
  color: var(--color-text-muted);
  line-height: 1.8;
  font-size: 16px;
  margin-bottom: 28px;
}
.about-card-btn {
  display: inline-block;
}

/* ===== HOME SECTION CARDS ===== */
/* ===== HOME PREVIEWS ===== */
.home-previews {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 56px;
}
.preview-col {
  background: var(--color-surface);
  border: 1px solid rgba(134,185,201,0.12);
  border-radius: var(--radius);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  overflow: hidden;
}
.preview-col::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-light));
}
.preview-col-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.preview-col-header h2 {
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  margin: 0;
}
.preview-see-all {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-light);
  text-decoration: none;
  letter-spacing: 0.5px;
  transition: color var(--transition);
  white-space: nowrap;
}
.preview-see-all:hover { color: #fff; }
.preview-col-desc {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(134,185,201,0.1);
}
.preview-items {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.preview-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 14px 0;
  border-bottom: 1px solid rgba(134,185,201,0.08);
  text-decoration: none;
  transition: background var(--transition);
  border-radius: 8px;
  margin: 0 -8px;
  padding-left: 8px;
  padding-right: 8px;
}
.preview-item:last-child { border-bottom: none; }
.preview-item:hover { background: rgba(7,102,171,0.12); }
.preview-item img {
  width: 68px;
  height: 56px;
  min-width: 68px;
  object-fit: cover;
  border-radius: 8px;
  background: rgba(7,102,171,0.2);
}
.preview-item-info {
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex: 1;
}
.preview-item-cat {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-light);
}
.preview-item-title {
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
}
.preview-item-desc {
  font-size: 12px;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ===== ÜRÜNLER ===== */
/* Category colour system */
.product-card { --cat-color: rgb(7,102,171); --cat-glow: rgba(7,102,171,0.3); }
.product-card[data-cat="HVAC"] { --cat-color: rgb(7,102,171); --cat-glow: rgba(7,102,171,0.3); }
.product-card[data-cat="BMS"]  { --cat-color: rgb(7,102,171); --cat-glow: rgba(7,102,171,0.3); }
.product-card[data-cat="Pano"] { --cat-color: rgb(7,102,171);  --cat-glow: rgba(7,102,171,0.3); }

.product-card {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.06);
  box-shadow: 0 4px 24px rgba(0,0,0,0.25);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 0 48px var(--cat-glow), 0 16px 40px rgba(0,0,0,0.3);
  border-color: var(--cat-color);
}

.product-card .card-img-wrap {
  position: relative;
  height: 240px;
  overflow: hidden;
  flex-shrink: 0;
  background: rgba(7,102,171,0.1);
}
.product-card .card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.product-card:hover .card-img { transform: scale(1.07); }
.product-card .card-img-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(transparent 55%, rgba(13,35,64,0.6) 100%);
  pointer-events: none;
}

/* Product number badge on image */
.product-num {
  position: absolute;
  top: 14px;
  left: 14px;
  font-size: 10px;
  font-weight: 800;
  color: rgba(255,255,255,0.5);
  letter-spacing: 3px;
  z-index: 2;
  font-family: 'Courier New', monospace;
}

/* White info section — creates dark/light contrast */
.product-card .card-body {
  background: #ffffff;
  padding: 20px 22px 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 9px;
  border-top: 3px solid var(--cat-color);
}

.product-category-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 10px;
  font-weight: 700;
  background: color-mix(in srgb, var(--cat-color) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--cat-color) 40%, transparent);
  color: var(--cat-color);
  letter-spacing: 0.6px;
  text-transform: uppercase;
  align-self: flex-start;
}

.product-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: #111827;
  line-height: 1.35;
}
.product-card p {
  font-size: 13px;
  color: #6b7280;
  line-height: 1.65;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.product-card .card-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-top: 11px;
  border-top: 1px solid #f0f0f0;
  margin-top: auto;
}
.product-card .card-cta {
  font-size: 12px;
  font-weight: 700;
  color: var(--cat-color);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--transition);
}
.product-card:hover .card-cta { gap: 10px; }
.card-cta-arrow { display: inline-block; transition: transform var(--transition); }
.product-card:hover .card-cta-arrow { transform: translateX(4px); }

/* ===== REFERANSLAR ===== */
.ref-card {
  overflow: hidden;
  cursor: default;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.06);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
a.ref-card {
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}
.ref-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 0 32px rgba(7,102,171,0.3);
  border-color: rgba(134,185,201,0.4);
}
.ref-card .ref-img-wrap {
  position: relative;
  height: 180px;
  overflow: hidden;
  flex-shrink: 0;
}
.ref-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s ease;
  background: rgba(7,102,171,0.2);
}
.ref-card:hover img { transform: scale(1.07); }
.ref-cat-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 3px 9px;
  border-radius: 12px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  background: rgba(13,35,64,0.78);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(134,185,201,0.3);
  color: var(--color-light);
  line-height: 1.5;
}
/* White info section for referanslar */
.ref-card-body {
  padding: 13px 15px 15px;
  flex-shrink: 0;
  background: #ffffff;
  border-top: 2px solid var(--color-primary);
}
.ref-card-name {
  font-size: 13px;
  font-weight: 600;
  color: #111827;
  line-height: 1.4;
}

/* ===== BASIN ===== */
.video-wrapper {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
}
.video-wrapper iframe {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  border: none;
}
.basin-award {
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 16px;
}
.basin-award img {
  width: 100%;
  border-radius: var(--radius-sm);
  object-fit: cover;
}
.basin-award h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-light);
}
.basin-award p { font-size: 14px; color: var(--color-text-muted); }

.basin-articles { display: flex; flex-direction: column; gap: 20px; }
.article-card { overflow: hidden; cursor: pointer; }
.article-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  transition: transform 0.35s ease;
}
.article-card:hover img { transform: scale(1.04); }

.video-play-badge {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 62px;
  height: 62px;
  border-radius: 50%;
  background: rgba(13,35,64,0.72);
  border: 2px solid rgba(232,244,248,0.85);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  transition: transform var(--transition), background var(--transition);
}
.video-play-badge::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 54%;
  transform: translate(-50%, -50%);
  border-style: solid;
  border-width: 12px 0 12px 20px;
  border-color: transparent transparent transparent #e8f4f8;
}
.basin-tur-badge {
  flex-shrink: 0;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  background: rgba(7,102,171,0.25);
  border: 1px solid var(--color-border);
  color: var(--color-light);
}
.basin-galeri-title {
  grid-column: 1 / -1;
  font-size: 20px;
  font-weight: 700;
  color: var(--color-light);
  margin-bottom: 20px;
}
.basin-watch-layout {
  display: grid;
  grid-template-columns: minmax(0, 2.2fr) minmax(280px, 1fr);
  gap: 28px;
  align-items: start;
}

.basin-player-media-wrap {
  position: relative;
  width: 100%;
}
.basin-player-media {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  background: #000;
}
.basin-player-media video,
.basin-player-media img,
.basin-player-media iframe {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  border: none;
}
.basin-player-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: rgba(0,0,0,0.45);
  backdrop-filter: blur(4px);
  color: #fff;
  font-size: 28px;
  line-height: 1;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition), opacity var(--transition);
  opacity: 0.75;
}
.basin-player-arrow:hover { background: rgba(7,102,171,0.85); opacity: 1; }
.basin-player-arrow[hidden] { display: none !important; }
.basin-player-prev { left: 12px; }
.basin-player-next { right: 12px; }

.basin-player-info { padding: 18px 4px 0; }
.basin-player-info h3 {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-text);
  margin: 10px 0 6px;
}
.basin-player-info p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.basin-player-gallery {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 16px;
}
.basin-player-gallery:empty { display: none; }
.basin-gallery-thumb {
  position: relative;
  width: 96px;
  height: 72px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  cursor: pointer;
  border: 2px solid transparent;
  flex-shrink: 0;
  transition: border-color var(--transition), transform var(--transition);
}
.basin-gallery-thumb:hover { transform: scale(1.04); }
.basin-gallery-thumb.active { border-color: var(--color-primary); }
.basin-gallery-thumb img,
.basin-gallery-thumb video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.basin-gallery-thumb .video-play-badge { width: 26px; height: 26px; }
.basin-gallery-thumb .video-play-badge::after { border-width: 6px 0 6px 9px; }

.basin-sidebar {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 640px;
  overflow-y: auto;
  scrollbar-width: thin;
  padding-right: 4px;
}
.basin-sidebar-item {
  display: flex;
  gap: 12px;
  padding: 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition);
}
.basin-sidebar-item:hover { background: rgba(7,102,171,0.1); }
.basin-sidebar-item.active {
  background: rgba(7,102,171,0.15);
  border-color: var(--color-border-hover);
}
.basin-sidebar-thumb {
  position: relative;
  width: 112px;
  height: 68px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #000;
}
.basin-sidebar-thumb img,
.basin-sidebar-thumb video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.basin-sidebar-info {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
  justify-content: center;
}
.basin-sidebar-info h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card > p {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ===== SERTİFİKALAR ===== */
.sert-card {
  overflow: hidden;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.06);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.sert-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 0 32px rgba(7,102,171,0.35);
  border-color: rgba(7,102,171,0.6);
}
.sert-card .sert-img-wrap {
  position: relative;
  height: 220px;
  overflow: hidden;
  background: #f8fafc;
  flex-shrink: 0;
}
.sert-card img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: top center;
  padding: 8px;
  transition: transform 0.35s ease;
}
.sert-card:hover img { transform: scale(1.04); }
.sert-zoom-hint {
  position: absolute;
  bottom: 10px;
  right: 10px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(13,35,64,0.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(134,185,201,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  opacity: 0;
  transform: scale(0.8);
  transition: opacity var(--transition), transform var(--transition);
}
.sert-card:hover .sert-zoom-hint {
  opacity: 1;
  transform: scale(1);
}
/* White info section */
.sert-card .sert-info {
  padding: 13px 15px 15px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  background: #ffffff;
  border-top: 2px solid var(--color-primary);
}
.sert-kurum-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.4px;
  background: rgba(7,102,171,0.1);
  border: 1px solid rgba(7,102,171,0.3);
  color: var(--color-primary);
  align-self: flex-start;
  line-height: 1.5;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}
.sert-card h3 {
  font-size: 13px;
  font-weight: 600;
  color: #111827;
  line-height: 1.4;
}

/* ===== PRODUCT MODAL ===== */
.product-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
}
.product-modal[hidden] { display: none; }
.product-modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(6px);
}
.product-modal-wrapper {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  animation: fadeSlideUp 0.25s ease;
}
.product-modal-content {
  width: min(920px, 92vw);
  max-height: 90vh;
  background: #ffffff;
  border-radius: 20px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 32px 80px rgba(0,0,0,0.5), 0 0 60px rgba(7,102,171,0.2);
}
.product-modal-close {
  margin-bottom: 8px;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: #fff;
  font-size: 24px;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition);
}
.product-modal-close:hover { background: rgba(139,38,46,0.5); }
.product-modal-gallery {
  position: relative;
  height: min(58vh, 520px);
  flex-shrink: 0;
  background: #0d1f33;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.gallery-main-wrap {
  flex: 1;
  height: 100%;
  overflow: hidden;
}
.gallery-main-wrap img {
  width: 100%; height: 100%;
  object-fit: contain;
  transition: opacity 0.2s ease;
}
.gallery-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: rgba(0,0,0,0.45);
  backdrop-filter: blur(4px);
  color: #fff;
  font-size: 28px;
  line-height: 1;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition), opacity var(--transition);
  opacity: 0.75;
}
.gallery-arrow:hover { background: rgba(7,102,171,0.85); opacity: 1; }
.gallery-arrow[hidden] { display: none !important; }
.gallery-prev { left: 12px; }
.gallery-next { right: 12px; }
.gallery-thumbs {
  display: flex;
  gap: 8px;
  padding: 10px 16px;
  overflow-x: auto;
  background: #f1f5f9;
  flex-shrink: 0;
  scrollbar-width: thin;
}
.gallery-thumbs:empty { display: none; }
.gallery-thumb {
  width: 68px; height: 52px;
  flex-shrink: 0;
  border-radius: 6px;
  overflow: hidden;
  border: 2px solid transparent;
  cursor: pointer;
  transition: border-color var(--transition), transform var(--transition);
}
.gallery-thumb:hover { transform: scale(1.05); }
.gallery-thumb.active { border-color: var(--color-primary); }
.gallery-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.product-modal-body {
  padding: 28px 32px 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
  color: #111827;
}
.product-modal-body .product-category-badge {
  color: var(--pm-cat-color, var(--color-primary));
  background: color-mix(in srgb, var(--pm-cat-color, var(--color-primary)) 10%, transparent);
  border-color: color-mix(in srgb, var(--pm-cat-color, var(--color-primary)) 35%, transparent);
}
#pm-title {
  font-size: 24px;
  font-weight: 800;
  color: #111827;
  line-height: 1.25;
}
#pm-desc {
  font-size: 15px;
  color: #4b5563;
  line-height: 1.75;
}

/* ===== LIGHTBOX ===== */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lightbox[hidden] { display: none; }
.lightbox-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.88);
  backdrop-filter: blur(4px);
}
.lightbox-content {
  position: relative;
  z-index: 1;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  animation: fadeSlideUp 0.25s ease;
}
.lightbox-img-wrap {
  width: min(85vw, 860px);
  height: min(75vh, 700px);
  overflow: hidden;
  border-radius: var(--radius-sm);
  box-shadow: 0 0 60px rgba(7,102,171,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: grab;
  user-select: none;
  background: linear-gradient(135deg, rgba(7,102,171,0.15) 0%, rgba(13,35,64,0.8) 100%);
  border: 1px solid rgba(134,185,201,0.15);
}
.lightbox-img-wrap.dragging { cursor: grabbing; }
.lightbox-img-wrap img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transform-origin: center center;
  transition: transform 0.15s ease;
  pointer-events: none;
}
.lightbox-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(8px);
  border-radius: 24px;
  padding: 6px 14px;
}
.lb-zoom-btn {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  color: #fff;
  font-size: 18px;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition);
}
.lb-zoom-btn:hover { background: rgba(7,102,171,0.7); }
#lb-zoom-level {
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  min-width: 44px;
  text-align: center;
}
#lightbox-caption {
  color: var(--color-text-muted);
  font-size: 14px;
  text-align: center;
}
.lightbox-close {
  position: absolute;
  top: -40px; right: 0;
  font-size: 24px;
  color: var(--color-text);
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  transition: background var(--transition);
}
.lightbox-close:hover { background: rgba(139,38,46,0.5); }

/* ===== HAKKIMIZDA ===== */
.hk-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  margin-bottom: 64px;
}
.hk-intro-text h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
}
.hk-intro-text p {
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1.75;
  margin-bottom: 12px;
}
.hk-intro-logos {
  display: flex;
  flex-direction: column;
  gap: 20px;
  justify-content: center;
}
.hk-intro-logo-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 28px 36px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.04);
  transition: border-color var(--transition);
}
.hk-intro-logo-card:hover {
  border-color: var(--color-border-hover);
}
.hk-intro-logo-light {
  background: rgba(255,255,255,0.96);
  border-color: rgba(255,255,255,0.15);
}
.hk-intro-logo-light:hover {
  border-color: rgba(255,255,255,0.3);
}
.hk-intro-logo-card span {
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.hk-intro-logo-light p {
  font-size: 13px;
  font-weight: 600;
  color: #1a2e50;
  line-height: 1.5;
  text-align: center;
  max-width: 200px;
}

.hk-sustain {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  margin-bottom: 64px;
}
.hk-sustain-photo {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0,0,0,0.4);
}
.hk-sustain-photo img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  object-position: center top;
  display: block;
}
.hk-sustain-text h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
}
.hk-sustain-text p {
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1.75;
  margin-bottom: 12px;
}

.hk-mv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 56px;
}
.hk-mv-card {
  padding: 36px 28px;
  text-align: center;
}
.hk-mv-icon {
  font-size: 32px;
  color: var(--color-primary);
  margin-bottom: 16px;
  line-height: 1;
}
.hk-mv-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}
.hk-mv-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
  text-align: left;
}
.hk-values-list {
  list-style: none;
  padding: 0;
  margin: 0;
  text-align: left;
}
.hk-values-list li {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.6;
  padding: 5px 0 5px 18px;
  position: relative;
}
.hk-values-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-size: 11px;
}

.hk-accreditations {
  text-align: center;
  padding: 48px 32px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}
.hk-accreditations h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 40px;
}
.hk-accred-logos {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
}
.hk-accred-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 32px 44px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.04);
  min-width: 260px;
  transition: border-color var(--transition);
}
.hk-accred-card:hover {
  border-color: var(--color-border-hover);
}
.hk-accred-card-light {
  background: rgba(255,255,255,0.96);
  border-color: rgba(255,255,255,0.15);
}
.hk-accred-card-light:hover {
  border-color: rgba(255,255,255,0.3);
}
.hk-accred-teknokent {
  height: 56px;
  width: auto;
  filter: brightness(0) invert(1);
  opacity: 0.88;
  transition: opacity var(--transition);
}
.hk-accred-card:hover .hk-accred-teknokent {
  opacity: 1;
}
.hk-accred-kosgeb-logo {
  width: 200px;
  height: auto;
}
.hk-accred-card span {
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.hk-accred-card-light p {
  font-size: 13px;
  font-weight: 600;
  color: #1a2e50;
  line-height: 1.5;
  text-align: center;
  max-width: 200px;
}

@media (max-width: 900px) {
  .hk-intro { grid-template-columns: 1fr; gap: 32px; }
  .hk-intro-logos { flex-direction: row; flex-wrap: wrap; justify-content: center; }
  .hk-intro-logo-card { flex: 1; min-width: 220px; }
  .hk-sustain { grid-template-columns: 1fr; gap: 32px; }
  .hk-sustain-photo { order: -1; }
  .hk-mv-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .hk-accred-logos { gap: 32px; }
}

/* ===== İLETİŞİM ===== */
.iletisim-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 28px;
  align-items: start;
}
.iletisim-addresses {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.address-card {
  padding: 28px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: stretch;
}
.address-info { display: flex; flex-direction: column; }
.address-icon { font-size: 28px; margin-bottom: 12px; }
.address-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-light);
  margin-bottom: 10px;
}
.address-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 6px;
}
.address-card a { color: var(--color-light); transition: color var(--transition); }
.address-card a:hover { color: var(--color-text); }

.map-wrapper { border-radius: var(--radius); overflow: hidden; height: 240px; }
.map-wrapper iframe { width: 100%; height: 100%; border: none; }

.iletisim-form { padding: 32px; }
.iletisim-form h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-light);
  margin-bottom: 24px;
}
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 20px; }
.form-group label { font-size: 13px; font-weight: 500; color: var(--color-text-muted); }
.form-group input,
.form-group textarea {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--color-text);
  font-family: var(--font);
  font-size: 14px;
  outline: none;
  resize: vertical;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(7,102,171,0.15);
}
.form-group input.error,
.form-group textarea.error { border-color: var(--color-accent); }
.field-error { font-size: 12px; color: var(--color-accent); min-height: 16px; }

.form-success {
  margin-top: 16px;
  padding: 14px 18px;
  background: rgba(7,102,171,0.15);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  color: var(--color-light);
  font-size: 14px;
  animation: fadeSlideUp 0.3s ease;
}

.form-error {
  margin-top: 16px;
  padding: 14px 18px;
  background: rgba(220,38,38,0.1);
  border: 1px solid rgba(220,38,38,0.4);
  border-radius: var(--radius-sm);
  color: #fca5a5;
  font-size: 14px;
  animation: fadeSlideUp 0.3s ease;
}
.form-error a { color: #fca5a5; text-decoration: underline; }

.form-rate-limit {
  margin-top: 12px;
  font-size: 13px;
  color: var(--color-text-muted);
}

/* KVKK checkbox */
.kvkk-group {
  margin-bottom: 20px;
  background: rgba(13, 35, 64, 0.55);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
}
.kvkk-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.5;
  cursor: pointer;
}
.kvkk-label input[type="checkbox"] {
  flex-shrink: 0;
  margin-top: 2px;
  accent-color: var(--color-primary);
  width: 16px;
  height: 16px;
  cursor: pointer;
  transition: none;
  isolation: isolate;
}

/* btn-secondary */
.btn-secondary {
  display: inline-block;
  padding: 12px 28px;
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition);
}
.btn-secondary:hover {
  border-color: var(--color-text-muted);
  color: var(--color-light);
}

/* Onay Modalı */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  align-items: center;
  justify-content: center;
  z-index: 2000;
  backdrop-filter: blur(4px);
}
.modal-overlay:not([hidden]) {
  display: flex;
  animation: fadeIn 0.2s ease;
}
.modal-dialog {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 36px 40px;
  max-width: 420px;
  width: 90%;
  box-shadow: 0 24px 64px rgba(0,0,0,0.5);
  animation: slideUp 0.2s ease;
}
.modal-dialog h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-light);
  margin-bottom: 12px;
}
.modal-sender {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 28px;
  word-break: break-all;
}
.modal-sender span { color: var(--color-light); }
.modal-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

@keyframes fadeIn  { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { transform: translateY(12px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* ===== FOOTER ===== */
#site-footer {
  position: relative;
  z-index: 1;
  background: #f0f4f8;
  border-top: 1px solid #dde3ea;
  padding: 40px 80px;
}
.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 16px;
  color: #111827;
}
.footer-logo-wrap {
  height: 36px; width: 36px;
  background: rgba(7,102,171,0.08);
  border: 1px solid rgba(7,102,171,0.2);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden; flex-shrink: 0;
}
.footer-logo { height: 30px; width: 30px; object-fit: contain; display: block; }
.footer-nav {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
}
.footer-nav a {
  font-size: 13px;
  font-weight: 500;
  color: #4b5563;
  transition: color var(--transition);
}
.footer-nav a:hover { color: var(--color-primary); }
.footer-copy {
  font-size: 13px;
  color: #9ca3af;
  width: 100%;
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid #dde3ea;
  margin-top: 8px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hamburger { display: flex; }

  #main-nav {
    position: fixed;
    top: var(--header-h);
    right: -100%;
    width: 260px;
    height: calc(100vh - var(--header-h));
    background: #ffffff;
    box-shadow: -4px 0 24px rgba(0,0,0,0.1);
    flex-direction: column;
    align-items: flex-start;
    padding: 32px 28px;
    gap: 28px;
    border-left: 1px solid #e8edf2;
    transition: right 0.35s ease;
    z-index: 999;
  }
  #main-nav.nav-open { right: 0; }
  .nav-link { font-size: 16px; color: #1f2937; }
}

@media (max-width: 1024px) {
  .page-section { padding: calc(var(--header-h) + 40px) 40px 60px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .home-previews { grid-template-columns: 1fr; }
  .basin-watch-layout { grid-template-columns: 1.6fr 1fr; }
  .iletisim-layout { grid-template-columns: 1fr; }
  .address-card { grid-template-columns: 1fr; }
  .map-wrapper { height: 220px; }
  .stats-bar { gap: 32px; }

  /* Showcase: 2-col on tablet */
  .grid-showcase { grid-template-columns: repeat(2, 1fr); }
  .product-featured { height: 300px; }
  .product-featured-body { flex-direction: column; align-items: flex-start; gap: 16px; padding: 24px; }
  .product-featured-text h2 { font-size: 22px; }

  /* Referanslar: 2-col on tablet */
  .grid-mosaic { grid-template-columns: repeat(2, 1fr); }

  /* Sertifikalar: 2-col */
  .grid-sert { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .page-section { padding: calc(var(--header-h) + 24px) 20px 40px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-showcase, .grid-mosaic, .grid-sert { grid-template-columns: 1fr; }
  .product-featured { height: 260px; }
  .basin-watch-layout { grid-template-columns: 1fr; }
  .basin-sidebar { max-height: 420px; }
  .product-featured-text h2 { font-size: 18px; }
  .hero-title { font-size: clamp(28px, 8vw, 48px); }
  .section-title { font-size: 30px; }
  .stats-bar { flex-direction: column; gap: 24px; }
  .stat-number { font-size: 42px; }
  .footer-inner { flex-direction: column; align-items: center; text-align: center; }
  .footer-nav { justify-content: center; }
  #site-footer { padding: 32px 20px; }
  .header-inner { padding: 0 20px; }
}

@media (max-width: 480px) {
  .grid-4 { grid-template-columns: 1fr; }
  .hero-logo { height: 80px; }
  .product-modal-content { width: 95vw; }
  .product-modal-gallery { height: min(42vh, 280px); }
  .product-modal-body { padding: 20px; }
}

/* ===== VISUAL POLISH ===== */
@keyframes glowPulse {
  0%, 100% { box-shadow: 0 0 20px var(--color-glow); }
  50%       { box-shadow: 0 0 40px var(--color-glow-strong), 0 0 80px rgba(7,102,171,0.2); }
}
.hero-cta { animation: glowPulse 3s ease-in-out infinite; }
.hero-cta:hover { animation: none; }

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 2px;
  margin: 12px auto 0;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--color-primary-dim); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-primary); }

::selection { background: rgba(7,102,171,0.4); color: #fff; }

@keyframes shimmer {
  0% { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}
img[loading="lazy"] {
  background: linear-gradient(90deg,
    rgba(7,102,171,0.1) 25%,
    rgba(134,185,201,0.15) 50%,
    rgba(7,102,171,0.1) 75%);
  background-size: 400px 100%;
  animation: shimmer 1.5s infinite;
}
img[loading="lazy"].loaded { animation: none; background: none; }