/* ===================== SCIENCE GOTHIC FONT ===================== */
@font-face {
    font-family: 'Science Gothic';
    /* Logo yazısı için küçültülmüş kopya (yalnızca gerekli harfler, 400–700 ağırlık) */
    src: url('science-gothic.woff2') format('woff2');
    font-weight: 400 700;
    font-style: normal;
    font-display: swap;
}

/* ===================== RESET & BASE ===================== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

:root {
    /* Renkler — derin mavi, koyu arduvaz (slate) ve metalik vurgular */
    --navy: #19375F;
    --navy-mid: #1e4070;
    --slate: #11284a;
    --slate-line: rgba(255,255,255,0.08);
    --blue: #4BAFE1;
    --blue-bright: #4BAFE1;
    --blue-bright-hover: #6fc0ea;
    --teal: #4BAFE1;
    --silver: #c5ced9;
    --metal: linear-gradient(135deg, #f1f4f8 0%, #b6c1ce 38%, #eef2f6 52%, #8f9cad 100%);
    --white: #ffffff;
    --off-white: #f3f7fb;
    --text: #19375F;
    --text-muted: #56657a;
    --border: #d8e5f0;
    /* Koyu zemin üzeri metin (WCAG AA ≥ 4.5:1) */
    --on-dark: rgba(255,255,255,0.92);
    --on-dark-muted: rgba(255,255,255,0.74);
    --on-dark-subtle: rgba(255,255,255,0.64);
    /* Tipografi ve ritim */
    --fs-eyebrow: 0.75rem;
    --fs-small: 0.875rem;
    --fs-body: 1rem;
    --fs-h2: clamp(2rem, 4vw, 3rem);
    --lh-body: 1.7;
    --section-y: 96px;
    --radius: 12px;
    --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
    --focus-ring: 0 0 0 3px rgba(75,175,225,0.55);
}

::selection { background: rgba(75,175,225,0.25); }
:focus-visible { outline: 2px solid var(--blue-bright); outline-offset: 3px; border-radius: 4px; }

body { font-family: 'Barlow', sans-serif; color: var(--text); background: var(--off-white); line-height: 1.6; }
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* ===================== HEADER ===================== */
header { background: var(--white); position: sticky; top: 0; z-index: 1000; border-bottom: 1px solid var(--border); box-shadow: 0 2px 12px rgba(27,54,93,0.08); }
nav { display: flex; justify-content: space-between; align-items: center; height: 64px; }

.logo { font-family: 'Science Gothic', 'Barlow Condensed', sans-serif; font-weight: 700; font-size: 1.4rem; color: #19375F; letter-spacing: 0.06em; text-decoration: none; display: flex; align-items: center; }
.logo span { color: #4BAFE1; font-weight: 400; margin-left: 2px; }
.logo-mark { width: 34px; height: 34px; margin-right: 10px; flex-shrink: 0; }
header .logo { color: #19375F; }

.nav-links { list-style: none; display: flex; gap: 36px; }
.nav-links a { position: relative; color: rgba(25,55,95,0.65); text-decoration: none; font-size: 0.85rem; font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; transition: color 0.2s; }
.nav-links a::after { content: ''; position: absolute; left: 0; right: 0; bottom: -4px; height: 2px; background: var(--blue-bright); border-radius: 2px; transform: scaleX(0); transform-origin: left; transition: transform 0.25s var(--ease); }
.nav-links a:hover { color: #19375F; }
.nav-links a:hover::after, .nav-links a.active-nav::after { transform: scaleX(1); }

.nav-right { display: flex; align-items: center; gap: 16px; }
.nav-cta { display: inline-flex; align-items: center; padding: 9px 18px; background: var(--navy); color: var(--white); text-decoration: none; font-size: 0.8rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; border-radius: 6px; transition: background 0.2s, transform 0.15s, box-shadow 0.2s; }
.nav-cta:hover { background: var(--navy-mid); box-shadow: 0 4px 14px rgba(25,55,95,0.25); }
.nav-cta:active { transform: translateY(1px); }

.lang-toggle { display: flex; align-items: center; gap: 6px; background: #f0f4f9; border: 1px solid var(--border); border-radius: 6px; padding: 4px 8px; }
.lang-btn { text-decoration: none; display: inline-block; line-height: 1.4; background: none; border: none; color: rgba(25,55,95,0.45); font-family: 'Barlow Condensed', sans-serif; font-size: 0.85rem; font-weight: 700; letter-spacing: 0.08em; cursor: pointer; padding: 2px 4px; border-radius: 3px; transition: color 0.2s, background 0.2s; }
.lang-btn.active { color: #19375F; background: rgba(75,175,225,0.15); }
.lang-btn:hover:not(.active) { color: rgba(25,55,95,0.75); }
.lang-divider { color: rgba(25,55,95,0.2); font-size: 0.75rem; user-select: none; }
.nav-toggle { display: none; flex-direction: column; justify-content: center; gap: 5px; width: 40px; height: 40px; padding: 0 9px; background: none; border: 1px solid var(--border); border-radius: 6px; cursor: pointer; }
.nav-toggle span { display: block; height: 2px; background: var(--navy); border-radius: 1px; transition: transform 0.2s, opacity 0.2s; }
nav.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
nav.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
nav.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===================== HERO ===================== */
.hero { min-height: 92vh; background: var(--navy); display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; padding: 80px 24px 60px; position: relative; overflow: hidden; }

.hero-bg-grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(75,175,225,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(75,175,225,0.04) 1px, transparent 1px); background-size: 60px 60px; pointer-events: none; }

.hero-particles { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 0; }

/* Radar animasyonu */
.hero-radar {
    position: absolute;
    right: -100px;
    top: 50%;
    transform: translateY(-50%);
    width: 600px;
    height: 600px;
    opacity: 0.12;
    pointer-events: none;
    z-index: 0;
}

.hero-radar svg { width: 100%; height: 100%; }

.radar-ring {
    fill: none;
    stroke: #4BAFE1;
    stroke-width: 1;
    animation: radarPulse 3s ease-out infinite;
}

@keyframes radarPulse {
    0%   { opacity: 0.8; stroke-width: 1.5; }
    100% { opacity: 0; stroke-width: 0.5; }
}

.radar-sweep {
    fill: url(#sweepGrad);
    animation: radarRotate 4s linear infinite;
    transform-origin: 300px 300px;
    fill: rgba(75,175,225,0.15);
}

.radar-sweep-line {
    stroke: #4BAFE1;
    stroke-width: 1.5;
    animation: radarRotate 4s linear infinite;
    transform-origin: 300px 300px;
    opacity: 0.6;
}

@keyframes radarRotate {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

.hero-content { position: relative; z-index: 1; max-width: 860px; }

.hero-tag { display: inline-block; font-size: var(--fs-eyebrow); font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--blue-bright); border: 1px solid rgba(197,206,217,0.35); background: rgba(255,255,255,0.03); padding: 6px 16px; border-radius: 20px; margin-bottom: 28px; }

.hero h1 { font-family: 'Barlow Condensed', sans-serif; font-size: clamp(2.8rem, 6vw, 5rem); font-weight: 800; color: var(--white); line-height: 1.05; margin-bottom: 24px; letter-spacing: -0.01em; }

.hero p { font-size: 1.1rem; color: var(--on-dark-muted); max-width: 660px; margin: 0 auto 36px; font-weight: 400; line-height: var(--lh-body); }
.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; }
.hero-points { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 28px; margin-top: 40px; padding-top: 28px; border-top: 1px solid var(--slate-line); }
.hero-points li { display: flex; align-items: center; gap: 8px; font-size: var(--fs-small); font-weight: 500; letter-spacing: 0.04em; color: var(--on-dark-muted); }
.hero-points li::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--metal); box-shadow: 0 0 0 3px rgba(197,206,217,0.12); }

.btn-primary, .btn-secondary { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 30px; min-height: 48px; text-decoration: none; font-weight: 700; font-size: 0.95rem; letter-spacing: 0.03em; border-radius: 8px; border: 1px solid transparent; cursor: pointer; transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.15s var(--ease), box-shadow 0.2s; }
/* Birincil eylem: marka mavisi zemin + lacivert metin (7.7:1) */
.btn-primary { background: var(--blue-bright); color: var(--navy); box-shadow: 0 6px 20px rgba(75,175,225,0.28); }
.btn-primary:hover { background: var(--blue-bright-hover); transform: translateY(-2px); box-shadow: 0 10px 28px rgba(75,175,225,0.38); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 3px 10px rgba(75,175,225,0.3); }
/* İkincil eylem: koyu zemin üzerinde çerçeveli */
.btn-secondary { background: transparent; color: var(--white); border-color: rgba(197,206,217,0.45); }
.btn-secondary:hover { background: rgba(255,255,255,0.08); border-color: var(--silver); transform: translateY(-2px); }
.btn-secondary:active { transform: translateY(0); }
.btn-primary:focus-visible, .btn-secondary:focus-visible { outline: none; box-shadow: var(--focus-ring); }

/* ===================== KURUMSAL ===================== */
/* ===================== NEDEN GANSAT ===================== */
.why-section {
    padding: calc(var(--section-y) * 0.75) 0 calc(var(--section-y) * 0.5);
    background: var(--navy);
    position: relative;
    z-index: 1;
}

.why-header {
    margin-bottom: 40px;
}

.why-title {
    color: var(--white);
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.why-card {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(197,206,217,0.14);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: background 0.25s, border-color 0.25s, transform 0.25s var(--ease), box-shadow 0.25s;
}

.why-card:hover {
    background: rgba(75,175,225,0.06);
    border-color: rgba(75,175,225,0.5);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.3), 0 0 20px rgba(75,175,225,0.1);
}

.why-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--blue-bright), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: 0 0 12px 12px;
}

.why-card { position: relative; }
.why-card:hover::after { opacity: 1; }

.why-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 20px;
}

.why-card h3 {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 12px;
    line-height: 1.3;
}

.why-card p {
    font-size: var(--fs-small);
    color: var(--on-dark-muted);
    line-height: var(--lh-body);
}

@media (max-width: 900px) {
    .why-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 520px) {
    .why-grid { grid-template-columns: 1fr; }
}

/* ===================== SAYAÇ BÖLÜMÜ ===================== */
.stats-section {
    padding: calc(var(--section-y) * 0.5) 0 calc(var(--section-y) * 0.5);
    background: var(--navy);
    position: relative;
    z-index: 1;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: rgba(197,206,217,0.12);
    border: 1px solid rgba(197,206,217,0.18);
    border-radius: 16px;
    overflow: hidden;
    position: relative;
}

/* Metalik üst kenar çizgisi */
.stats-grid::before { content: ''; position: absolute; top: 0; left: 8%; right: 8%; height: 1px; background: var(--metal); opacity: 0.7; }

.stat-card {
    background: rgba(0,10,30,0.6);
    padding: 40px 32px;
    text-align: center;
    transition: background 0.2s;
}

.stat-card:hover { background: rgba(75,175,225,0.06); }

.stat-card-num {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
    margin-bottom: 12px;
}

.counter {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 800;
    color: var(--white);
    line-height: 1;
}

.stat-card-suffix {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 600;
    color: var(--blue-bright);
}

.stat-card-text span {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 800;
    color: var(--blue-bright);
    line-height: 1;
}

.stat-card-label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--on-dark-muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    line-height: 1.4;
}

@media (max-width: 768px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .stat-card { padding: 28px 20px; }
}

@media (max-width: 400px) {
    .stats-grid { grid-template-columns: 1fr; }
}

.wave-divider {
    background: var(--navy);
    line-height: 0;
    margin-bottom: -2px;
}

.wave-divider svg {
    display: block;
    width: 100%;
    height: 80px;
}

#kurumsal, #cozumler, #iletisim,
#about, #products, #contact {
    scroll-margin-top: 64px;
}

.about-section { padding: 24px 0 calc(var(--section-y) * 0.75); background: var(--white); }
.about-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 80px; align-items: center; }

.section-tag { display: inline-block; font-size: var(--fs-eyebrow); font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--blue); border: 1px solid rgba(75,175,225,0.25); padding: 5px 14px; border-radius: 20px; margin-bottom: 16px; }
.section-tag.light { color: var(--on-dark-muted); border-color: rgba(197,206,217,0.3); }

/* Ortak bölüm başlığı ölçeği */
.solutions-title, .why-title, .about-left h2, .contact-title { font-family: 'Barlow Condensed', sans-serif; font-size: var(--fs-h2); font-weight: 800; line-height: 1.1; letter-spacing: -0.01em; }
.about-left h2 { color: var(--navy); }
.about-right p { font-size: var(--fs-body); color: var(--text-muted); line-height: 1.8; }

/* Scroll reveal */
.product-card, .gallery-item, .about-grid { opacity: 0; transform: translateY(24px); transition: opacity 0.5s ease, transform 0.5s ease; }
.product-card.visible, .gallery-item.visible, .about-grid.visible { opacity: 1; transform: none; }
.product-card:nth-child(2) { transition-delay: 0.08s; }
.product-card:nth-child(3) { transition-delay: 0.16s; }
.product-card:nth-child(4) { transition-delay: 0.24s; }

/* ===================== GALERİ ===================== */
.gallery-section { padding: 0 0 var(--section-y); background: var(--white); }
.gallery-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.gallery-item { position: relative; border-radius: var(--radius); overflow: hidden; aspect-ratio: 16/9; box-shadow: 0 1px 2px rgba(25,55,95,0.06), 0 8px 24px rgba(25,55,95,0.08); }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.4s ease; }
.gallery-item:hover img { transform: scale(1.03); }

/* ===================== ÇÖZÜMLER ===================== */
.solutions-section { 
    padding: var(--section-y) 0 0; 
    background: var(--navy);
    position: relative; 
    overflow: hidden; 
}

.solutions-section::after { content: none; }
.solutions-section::before { content: ''; position: absolute; inset: 0; background-image: linear-gradient(rgba(75,175,225,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(75,175,225,0.03) 1px, transparent 1px); background-size: 60px 60px; pointer-events: none; z-index: 0; }

.solutions-header { margin-bottom: 40px; position: relative; z-index: 1; }
.solutions-title { color: var(--white); }
.solutions-title em { font-style: normal; color: var(--blue-bright); }

.band-group { margin-bottom: 56px; position: relative; z-index: 1; }
.band-header { display: flex; align-items: center; gap: 12px; margin-bottom: 6px; }
.band-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.band-dot.ku { background: var(--blue-bright); box-shadow: 0 0 8px rgba(75,175,225,0.6); }
.band-dot.c  { background: var(--teal); box-shadow: 0 0 8px rgba(0,201,167,0.6); }
.band-label { font-family: 'Barlow Condensed', sans-serif; font-size: 1rem; font-weight: 700; letter-spacing: 0.12em; color: var(--on-dark); }
.band-freq { font-family: 'Barlow Condensed', sans-serif; font-size: 0.95rem; color: var(--on-dark-subtle); letter-spacing: 0.04em; }
.band-desc { font-size: var(--fs-small); color: var(--on-dark-subtle); margin: 0 0 24px 20px; letter-spacing: 0.02em; }

/* Kart ızgarası - 5'li grid */
.products-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; max-width: 1100px; }

/* Ürün kartı - dikey kare düzen */
.product-card {
    background: #f0f4f8;
    border-radius: 12px;
    cursor: pointer;
    transition: transform 0.22s ease, box-shadow 0.22s ease;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    overflow: hidden;
    position: relative;
    border: 1px solid rgba(27,54,93,0.1);
    min-height: 280px;
}

.product-card:hover, .product-card:focus-visible {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(27,54,93,0.25), 0 0 24px rgba(79,163,209,0.18);
    border-color: rgba(79,163,209,0.5);
}

/* Görsel alanı — şeffaf PNG için koyu arka plan */
.card-img-wrap {
    width: 100%;
    height: 160px;
    background: var(--navy-mid, #22406e);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 16px;
    overflow: hidden;
    clip-path: none;
    flex-shrink: 0;
}

.card-img-wrap img {
    max-width: 100%;
    max-height: 120px;
    width: auto;
    height: auto;
    object-fit: contain;
    transition: transform 0.3s ease;
    filter: drop-shadow(0 4px 16px rgba(0,0,0,0.4));
}

.product-card:hover .card-img-wrap img { transform: scale(1.06); }

.card-inner { padding: 14px 16px; flex: 1; display: flex; flex-direction: column; }

.card-watt { font-family: 'Barlow Condensed', sans-serif; font-size: 2.2rem; font-weight: 800; color: var(--navy); line-height: 1; margin-bottom: 6px; }
.card-watt span { font-size: 1.1rem; font-weight: 600; color: var(--text-muted); }

.card-quick-specs { display: flex; gap: 4px; flex-wrap: wrap; margin-bottom: 8px; }
.card-quick-specs span { font-size: 10px; font-weight: 600; color: var(--text-muted); background: #e8eef5; padding: 2px 6px; border-radius: 3px; }

.card-tag { display: inline-block; font-size: 9px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; padding: 2px 7px; border-radius: 4px; }
.card-tag.ku { background: #dceefb; color: #0a4a80; }
.card-tag.c  { background: #d0f5ee; color: #0a5a4a; }

.card-action {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 16px;
    font-size: 11px;
    font-weight: 700;
    color: var(--white);
    background: #1B365D;
    letter-spacing: 0.04em;
    border-top: none;
    width: 100%;
    transition: background 0.15s;
    white-space: nowrap;
    text-align: center;
    margin-top: auto;
    flex-shrink: 0;
}

.product-card:hover .card-action, .product-card:focus-visible .card-action { background: #4FA3D1; }
.product-card:focus-visible { outline: none; box-shadow: 0 16px 40px rgba(27,54,93,0.25), var(--focus-ring); }
.product-card:active { transform: translateY(-1px); }
.card-action svg { transition: transform 0.2s var(--ease); }
.product-card:hover .card-action svg, .product-card:focus-visible .card-action svg { transform: translateX(3px); }

.card-glow {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--blue-bright), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.product-card:hover .card-glow { opacity: 1; }

/* Kart üst kenarda parlama */
.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--blue-bright), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1;
}

.product-card:hover::before { opacity: 1; }

.solutions-footnote { font-size: var(--fs-small); color: var(--on-dark-subtle); border-top: 1px solid var(--slate-line); padding-top: 28px; margin-top: 8px; position: relative; z-index: 1; }
.solutions-footnote a { color: var(--blue-bright); text-decoration: none; font-weight: 600; text-underline-offset: 3px; }
.solutions-footnote a:hover { text-decoration: underline; }

/* ===================== MODAL ===================== */
.modal { display: none; position: fixed; inset: 0; z-index: 2000; background: rgba(0,15,35,0.85); backdrop-filter: blur(4px); align-items: center; justify-content: center; }
.modal.open { display: flex; animation: modalFade 0.2s ease; }

.modal-content { background: var(--white); border-radius: 14px; padding: 36px; width: 90%; max-width: 500px; position: relative; animation: modalIn 0.25s var(--ease); max-height: 90vh; overflow-y: auto; overscroll-behavior: contain; box-shadow: 0 30px 80px rgba(0,0,0,0.45); }

@keyframes modalFade { from { opacity: 0; } to { opacity: 1; } }
@keyframes modalIn { from { opacity: 0; transform: scale(0.96) translateY(12px); } to { opacity: 1; transform: scale(1) translateY(0); } }

.modal-close { position: absolute; top: 16px; right: 16px; background: #f0f2f5; border: none; border-radius: 50%; width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; cursor: pointer; color: #6b7a90; transition: background 0.15s, color 0.15s; }
.modal-close:hover { background: #e2e8f0; color: var(--navy); }

.modal-band-tag { display: inline-block; font-size: 10px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; padding: 4px 12px; border-radius: 4px; margin-bottom: 10px; }
.modal-band-tag.ku { background: #dceefb; color: #0a4a80; }
.modal-band-tag.c  { background: #d0f5ee; color: #0a5a4a; }

.modal-content h3 { font-family: 'Barlow Condensed', sans-serif; font-size: 2.2rem; font-weight: 800; color: var(--navy); margin-bottom: 8px; }
.modal-desc { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 20px; font-weight: 300; }

.modal-specs { display: flex; flex-direction: column; margin-bottom: 20px; }
.spec-row { display: flex; justify-content: space-between; align-items: center; padding: 11px 0; border-bottom: 1px solid #f0f2f5; font-size: 0.88rem; }
.spec-row:last-child { border-bottom: none; }
.spec-row span { color: var(--text-muted); }
.spec-row strong { color: var(--navy); font-weight: 600; }

/* Modal Tabs */
.modal-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.mtab {
    flex: 1;
    padding: 10px 14px;
    border: none;
    border-right: 1px solid var(--border);
    background: var(--off-white);
    font-family: 'Barlow', sans-serif;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.mtab:last-child { border-right: none; }

.mtab.active {
    background: var(--navy);
    color: var(--white);
}

.mtab:hover:not(.active) { background: var(--border); color: var(--navy); }

.modal-tab-content { display: none; }
.modal-tab-content.active { display: block; }

.modal-model-name {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--blue);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 12px;
    padding: 6px 10px;
    background: #f0f7ff;
    border-radius: 4px;
}

.modal-detail-btn { display: block; text-align: center; padding: 13px; background: var(--navy); color: var(--white); text-decoration: none; font-weight: 600; font-size: 0.9rem; letter-spacing: 0.04em; border-radius: 8px; transition: background 0.2s, color 0.2s; }
.modal-detail-btn:hover { background: var(--blue-bright); color: var(--navy); }

/* ===================== İLETİŞİM ===================== */
.contact-section { padding: var(--section-y) 0; background: var(--white); }
.contact-title { color: var(--navy); margin-bottom: 40px; }
.contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 60px; align-items: start; }

.info-item { margin-bottom: 28px; }
.info-label { display: block; font-size: var(--fs-eyebrow); font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--blue); margin-bottom: 6px; }
.contact-info p { font-size: 0.95rem; color: var(--text-muted); line-height: 1.6; }
.contact-info a { color: var(--blue); text-decoration: none; }
.contact-info a:hover { text-decoration: underline; }

.map-wrap { width: 100%; margin-top: 8px; border-radius: 8px; overflow: hidden; border: 1px solid var(--border); }

.contact-form-box { background: var(--off-white); border: 1px solid var(--border); border-radius: var(--radius); padding: 36px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 0.78rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 8px; }
.form-group input, .form-group textarea { width: 100%; padding: 12px 16px; background: var(--white); border: 1px solid var(--border); border-radius: 6px; font-family: 'Barlow', sans-serif; font-size: 0.95rem; color: var(--text); transition: border-color 0.2s; outline: none; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.form-group label.required::after { content: ' *'; color: #b42318; }
.form-group input:hover, .form-group textarea:hover { border-color: #c3ccd8; }
.form-group input[aria-invalid="true"], .form-group textarea[aria-invalid="true"] { border-color: #d92d20; box-shadow: 0 0 0 3px rgba(217,45,32,0.12); }
.field-error { margin-top: 6px; font-size: 0.8rem; font-weight: 500; color: #b42318; }
.form-note { margin-top: 14px; font-size: 0.8rem; color: var(--text-muted); text-align: center; }
/* Bal küpü alanı: ekranda ve ekran okuyucularda görünmez */
.hp-field { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.form-group input:focus, .form-group textarea:focus { border-color: var(--blue-bright); box-shadow: 0 0 0 3px rgba(75,175,225,0.18); }

.btn-submit { width: 100%; min-height: 48px; padding: 14px; background: var(--navy); color: var(--white); border: none; border-radius: 8px; font-family: 'Barlow', sans-serif; font-size: 0.95rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; cursor: pointer; transition: background 0.2s, color 0.2s, transform 0.15s; }
.btn-submit:hover { background: var(--blue-bright); color: var(--navy); }
.btn-submit:active { transform: translateY(1px); }
.btn-submit:disabled { opacity: 0.6; cursor: not-allowed; }

.form-msg {
    padding: 12px 16px;
    border-radius: 6px;
    font-size: 0.88rem;
    margin-bottom: 16px;
    line-height: 1.5;
}

.form-msg.success {
    background: #d0f5ee;
    color: #0a5a4a;
    border: 1px solid #a0e8d8;
}

.form-msg.error {
    background: #fde8e8;
    color: #8b1a1a;
    border: 1px solid #f5c0c0;
}

/* ===================== SCROLL TO TOP ===================== */
.scroll-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 44px;
    height: 44px;
    background: var(--blue-bright);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(75,175,225,0.4);
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.3s, transform 0.3s, background 0.2s;
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    transform: translateY(0);
}

.scroll-top:hover { background: var(--blue-bright-hover); }
.scroll-top svg { color: var(--navy); }

/* ===================== ACTIVE NAV ===================== */
.nav-links a.active-nav { color: #19375F; }

/* ===================== LOADING ===================== */
.loader {
    position: fixed;
    inset: 0;
    background: var(--navy);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader-hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-logo {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 2rem;
    font-weight: 800;
    color: var(--white);
    letter-spacing: 0.04em;
}

.loader-logo span {
    color: var(--blue-bright);
    font-weight: 400;
}

.loader-bar {
    width: 200px;
    height: 2px;
    background: rgba(255,255,255,0.1);
    border-radius: 2px;
    overflow: hidden;
}

.loader-fill {
    height: 100%;
    background: var(--blue-bright);
    border-radius: 2px;
    animation: loaderFill 1.2s ease forwards;
}

@keyframes loaderFill {
    from { width: 0%; }
    to   { width: 100%; }
}

/* ===================== SERTİFİKALAR ===================== */
.certs-section {
    padding: 36px 0;
    background: var(--slate);
    position: relative;
}
.certs-section::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: var(--metal); opacity: 0.35; }

.certs-label {
    font-size: var(--fs-eyebrow);
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--on-dark-subtle);
    margin-bottom: 20px;
    text-align: center;
}

.certs-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    flex-wrap: wrap;
}

.cert-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 32px;
}

.cert-item div {
    display: flex;
    flex-direction: column;
}

.cert-item strong {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--white);
    letter-spacing: 0.03em;
}

.cert-item span {
    font-size: 0.75rem;
    color: var(--on-dark-subtle);
    letter-spacing: 0.04em;
}

.cert-divider {
    width: 1px;
    height: 36px;
    background: var(--slate-line);
}

@media (max-width: 768px) {
    .certs-grid { flex-direction: column; gap: 12px; }
    .cert-divider { display: none; }
    .cert-item { padding: 8px 0; }
}

/* ===================== FOOTER ===================== */
footer { padding: 32px 0; background: var(--slate); border-top: 1px solid var(--slate-line); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; }
footer p { font-size: var(--fs-small); color: var(--on-dark-subtle); }
footer .logo { color: var(--white); }
/* Sosyal medya ikonları */
.social-links { display: flex; gap: 10px; }
.social-links a { width: 38px; height: 38px; display: inline-flex; align-items: center; justify-content: center; border-radius: 50%; border: 1px solid rgba(255,255,255,0.28); color: var(--white); transition: background 0.2s, border-color 0.2s, color 0.2s, transform 0.15s; }
.social-links a:hover { background: var(--blue-bright); border-color: var(--blue-bright); color: var(--navy); transform: translateY(-2px); }
/* İletişim bölümündeki ikonlu linkler */
.icon-link { display: inline-flex; align-items: center; gap: 8px; }
.icon-link svg { flex-shrink: 0; color: var(--blue-bright); }
.contact-social { display: flex; flex-wrap: wrap; gap: 8px 22px; }

/* ===================== MOBİL ===================== */
@media (max-width: 1100px) {
    /* Orta genişlikte menü aralıkları daralır (geniş logo yazısı için yer açar) */
    .nav-links { gap: 22px; }
    .nav-right { gap: 12px; }
}

@media (max-width: 1000px) {
    .products-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
    .products-grid { grid-template-columns: repeat(3, 1fr); }
    .about-grid { grid-template-columns: 1fr; gap: 32px; }
    .contact-grid { grid-template-columns: 1fr; }
    /* Mobil menü (☰) 900px altında devreye girer */
    nav { position: relative; gap: 12px; }
    .logo { margin-right: auto; white-space: nowrap; }
    /* Science Gothic geniş bir yazı tipi: küçük ekranlarda logo yazısı ekran genişliğiyle ölçeklenir */
    header .logo { font-size: min(1.4rem, 3.8vw); letter-spacing: 0.02em; }
    .lang-toggle { flex-shrink: 0; }
    .nav-right { gap: 10px; flex-shrink: 0; }
    .nav-toggle { display: flex; flex-shrink: 0; }
    .nav-links { display: flex; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--white); border-bottom: 1px solid var(--border); box-shadow: 0 8px 16px rgba(25,55,95,0.08); padding: 8px 24px 16px; opacity: 0; visibility: hidden; transform: translateY(-8px); transition: opacity 0.2s ease, transform 0.25s var(--ease), visibility 0s linear 0.25s; }
    nav.nav-open .nav-links { opacity: 1; visibility: visible; transform: none; transition: opacity 0.2s ease, transform 0.25s var(--ease), visibility 0s; }
    .nav-links a { display: block; padding: 12px 0; font-size: 0.95rem; }
    .nav-links a::after { display: none; }
    .nav-links a:active { color: var(--navy); }
    .nav-links li + li { border-top: 1px solid var(--border); }
    .nav-cta { display: none; }
    .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    :root { --section-y: 64px; }
    .hero { padding: 56px 24px 48px; }
    .hero-points { margin-top: 32px; padding-top: 24px; gap: 10px 20px; }
    .gallery-grid { grid-template-columns: 1fr; }
    .footer-inner { flex-direction: column; gap: 14px; text-align: center; }
    footer .logo { justify-content: center; }
}

@media (max-width: 600px) {
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .card-img-wrap { height: 130px; }
    .hero-actions { flex-direction: column; align-items: stretch; }
}

@media (max-width: 520px) {
    .modal-content { padding: 24px 18px; }
}

@media (max-width: 480px) {
    .container { padding: 0 16px; }
    nav { gap: 8px; }
    .nav-right { gap: 8px; }
    .logo-mark { width: 28px; height: 28px; margin-right: 8px; }
    .lang-toggle { padding: 3px 5px; gap: 3px; }
    .lang-btn { padding: 2px 3px; }
    .nav-toggle { width: 36px; height: 36px; padding: 0 8px; }
    .nav-links { padding: 8px 16px 16px; }
    .loader-logo { font-size: 1.6rem; }
    .hero h1 { font-size: clamp(2rem, 9.3vw, 2.8rem); }
}

@media (max-width: 350px) {
    .logo-mark { width: 24px; height: 24px; margin-right: 6px; }
    .lang-divider { display: none; }
}

/* ===================== HAREKET AZALTMA ===================== */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
    .product-card, .gallery-item, .about-grid { opacity: 1; transform: none; }
}