:root {
    --bg-body: #070b14;
    --bg-darker: #04070d;
    --bg-dark: #0a0f1d;
    --surface: #10182b;
    --surface-glass: rgba(16, 24, 43, 0.82);
    --surface-glass-hover: rgba(22, 33, 60, 0.95);
    --surface-solid: #0d1424;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dim: #64748b;
    /* Logodaki Kurumsal Kırmızı (Isıtma) ve Mavi (Soğutma) Renkleri */
    --brand-red: #e30613;
    --brand-red-light: #ff3847;
    --brand-red-dark: #b9050f;
    --brand-blue: #004b93;
    --brand-blue-light: #38bdf8;
    --brand-blue-accent: #2563eb;
    --whatsapp: #16a34a;
    --whatsapp-hover: #15803d;
    --primary: #e30613;
    --primary-glow: rgba(227, 6, 19, 0.35);
    --blue-glow: rgba(0, 75, 147, 0.35);
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.18);
    --radius: 16px;
    --shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 20px 45px -15px rgba(0, 0, 0, 0.7);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-main);
    background-color: var(--bg-body);
}

body {
    line-height: 1.6;
    overflow-x: hidden;
    background-color: var(--bg-body);
    color: var(--text-main);
    position: relative;
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.2s ease;
}

.container {
    width: 100%;
    max-width: 1220px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 2;
}

/* ========================================================
   Arka Plan: Kesintisiz Çift Renk Yerden Isıtma & Soğutma Deseni
   Sol Taraf: Sıcak Renk (Kırmızı Yerden Isıtma)
   Sağ Taraf: Soğuk Renk (Mavi Yerden Soğutma)
   Kesik kesik görüntü kaldırıldı; tam ekran, akıcı ve derinlikli
   ======================================================== */
.floor-heating-flanks {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.heating-flank {
    position: absolute;
    top: 0;
    bottom: 0;
    height: 100vh;
    transition: opacity 0.3s ease;
}

/* Sol Taraf: Sıcak Renk (Kırmızı Yerden Isıtma Boruları & Modüllü Strafor) */
.heating-flank.flank-left {
    left: 0;
    width: 52vw;
    background-image: url('yerden-isitma-pattern-dark.jpg');
    background-size: cover;
    background-position: left center;
    background-repeat: no-repeat;
    opacity: 0.62;
    filter: saturate(1.2) contrast(1.1);
    -webkit-mask-image: linear-gradient(to right, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 0.85) 45%, rgba(0, 0, 0, 0.2) 80%, transparent 100%);
    mask-image: linear-gradient(to right, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 0.85) 45%, rgba(0, 0, 0, 0.2) 80%, transparent 100%);
}

/* Sağ Taraf: Soğuk Renk (Mavi Soğutma Boruları & Modüllü Strafor) */
.heating-flank.flank-right {
    right: 0;
    width: 52vw;
    background-image: url('yerden-isitma-pattern-blue.jpg');
    background-size: cover;
    background-position: right center;
    background-repeat: no-repeat;
    opacity: 0.62;
    filter: saturate(1.2) contrast(1.1);
    -webkit-mask-image: linear-gradient(to left, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 0.85) 45%, rgba(0, 0, 0, 0.2) 80%, transparent 100%);
    mask-image: linear-gradient(to left, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 0.85) 45%, rgba(0, 0, 0, 0.2) 80%, transparent 100%);
}

/* Sol Taraf: Sıcak Kırmızı Termal Isıtma Işıması */
.flank-ambient-glow-left {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 45vw;
    background: radial-gradient(ellipse at 0% 50%, rgba(227, 6, 19, 0.28) 0%, rgba(227, 6, 19, 0.08) 55%, transparent 80%);
    pointer-events: none;
}

/* Sağ Taraf: Soğuk Mavi İklimlendirme / VRF Soğutma Işıması */
.flank-ambient-glow-right {
    position: absolute;
    top: 0;
    bottom: 0;
    right: 0;
    width: 45vw;
    background: radial-gradient(ellipse at 100% 50%, rgba(0, 110, 230, 0.32) 0%, rgba(56, 189, 248, 0.12) 55%, transparent 80%);
    pointer-events: none;
}

/* Sayfa Merkezinde Kart ve Metin Okunabilirliği İçin Yumuşak Karartma */
.center-ambient-vignette {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: radial-gradient(ellipse 70% 75% at 50% 50%, rgba(7, 11, 20, 0.6) 0%, rgba(7, 11, 20, 0.3) 65%, transparent 100%);
    pointer-events: none;
    z-index: 0;
}

/* Top Bar */
.topbar {
    background: var(--bg-darker);
    color: #cbd5e1;
    font-size: 0.84rem;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    position: relative;
    z-index: 10;
}

.topbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.topbar-left, .topbar-right {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 14px;
}

.divider {
    opacity: 0.25;
}

.topbar-phone {
    color: #38bdf8;
    font-weight: 700;
}

.topbar-phone:hover {
    color: #ffffff;
}

/* Navbar & Kurumsal Logo */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(8, 12, 22, 0.88);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
    transition: background 0.3s ease, border-color 0.3s ease;
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

.brand-logo {
    display: inline-flex;
    align-items: center;
}

.asberk-logo-svg {
    height: 60px;
    width: auto;
    display: block;
}

/* Koyu Temada ASBERK Yazısı Bembeyaz & Işıltılı */
.logo-title {
    fill: #ffffff;
    font-family: 'Plus Jakarta Sans', Arial, sans-serif;
    font-weight: 800;
}

.logo-subtitle {
    fill: #cbd5e1;
    font-family: 'Plus Jakarta Sans', Arial, sans-serif;
    font-weight: 600;
}

.logo-title-light {
    fill: #ffffff;
    font-family: 'Plus Jakarta Sans', Arial, sans-serif;
}

.logo-subtitle-light {
    fill: #94a3b8;
    font-family: 'Plus Jakarta Sans', Arial, sans-serif;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
    font-weight: 600;
    font-size: 0.93rem;
    color: var(--text-muted);
}

.nav-links a {
    position: relative;
    padding: 4px 0;
}

.nav-links a:hover {
    color: #ffffff;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--brand-red);
    transition: width 0.25s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    border: none;
    transition: all 0.25s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--brand-red), #ff2a36);
    color: #fff;
    box-shadow: 0 8px 22px -4px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px -4px rgba(227, 6, 19, 0.55);
}

.btn-whatsapp {
    background: linear-gradient(135deg, #22c55e, var(--whatsapp));
    color: #fff;
    box-shadow: 0 8px 20px -4px rgba(22, 163, 74, 0.35);
}

.btn-whatsapp:hover {
    transform: translateY(-2px);
    background: var(--whatsapp-hover);
    box-shadow: 0 12px 24px -4px rgba(22, 163, 74, 0.5);
}

.btn-outline {
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-lg {
    padding: 15px 28px;
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

/* Hero Section */
.hero {
    position: relative;
    z-index: 1;
    background: radial-gradient(circle at 20% 20%, rgba(22, 33, 56, 0.35) 0%, rgba(6, 9, 18, 0.55) 100%);
    color: #fff;
    padding: 84px 0 96px;
    overflow: hidden;
    border-bottom: 1px solid var(--border);
}

.hero-bg-glow-red {
    position: absolute;
    width: 550px;
    height: 550px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(227, 6, 19, 0.22) 0%, transparent 70%);
    top: -100px;
    left: -100px;
    pointer-events: none;
}

.hero-bg-glow-blue {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 75, 147, 0.32) 0%, transparent 70%);
    bottom: -140px;
    right: -100px;
    pointer-events: none;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 56px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    padding: 8px 16px;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
    color: #e2e8f0;
    margin-bottom: 24px;
}

.pulse-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--brand-red);
    box-shadow: 0 0 0 6px rgba(227, 6, 19, 0.3);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(227, 6, 19, 0.5); }
    70% { box-shadow: 0 0 0 10px rgba(227, 6, 19, 0); }
    100% { box-shadow: 0 0 0 0 rgba(227, 6, 19, 0); }
}

.hero h1 {
    font-size: clamp(2.2rem, 4vw, 3.4rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: 20px;
    color: #ffffff;
}

.gradient-text {
    background: linear-gradient(90deg, #ff4d57, #38bdf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    font-size: 1.1rem;
    color: #cbd5e1;
    margin-bottom: 32px;
    max-width: 580px;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 48px;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    max-width: 460px;
    gap: 24px;
    padding-top: 28px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-num {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    color: #fff;
}

.stat-label {
    font-size: 0.85rem;
    color: #94a3b8;
}

/* ========================================================
   Gelişmiş Akıllı İklimlendirme Kontrol Paneli (Thermostat)
   ======================================================== */
.thermostat-card {
    background: rgba(14, 22, 38, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 24px;
    padding: 24px 26px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.75);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.thermostat-card:hover {
    border-color: rgba(255, 255, 255, 0.22);
}

.thermostat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 18px;
}

.thermo-title-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.thermo-icon {
    font-size: 1.4rem;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.thermo-title-group strong {
    display: block;
    font-size: 0.95rem;
    color: #ffffff;
    font-weight: 700;
}

.thermo-title-group small {
    display: block;
    color: #94a3b8;
    font-size: 0.76rem;
}

.status-pill {
    background: rgba(227, 6, 19, 0.2);
    color: #fca5a5;
    padding: 6px 14px;
    border-radius: 99px;
    font-weight: 700;
    font-size: 0.78rem;
    border: 1px solid rgba(227, 6, 19, 0.3);
    white-space: nowrap;
    transition: all 0.3s ease;
}

/* Mod Değiştirme Sekmeleri */
.thermo-mode-tabs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    background: rgba(0, 0, 0, 0.45);
    padding: 5px;
    border-radius: 12px;
    margin-bottom: 20px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.mode-tab {
    padding: 9px 8px;
    border: none;
    background: transparent;
    color: #94a3b8;
    font-family: inherit;
    font-size: 0.82rem;
    font-weight: 700;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.mode-tab:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.05);
}

.mode-tab.active[data-mode="heat"] {
    background: linear-gradient(135deg, var(--brand-red), #ff2a36);
    color: #ffffff;
    box-shadow: 0 4px 16px rgba(227, 6, 19, 0.45);
}

.mode-tab.active[data-mode="cool"] {
    background: linear-gradient(135deg, #0284c7, #38bdf8);
    color: #ffffff;
    box-shadow: 0 4px 16px rgba(2, 132, 199, 0.45);
}

.mode-tab.active[data-mode="eco"] {
    background: linear-gradient(135deg, #16a34a, #22c55e);
    color: #ffffff;
    box-shadow: 0 4px 16px rgba(22, 163, 74, 0.45);
}

/* Kadran (Dial Ring) */
.thermostat-dial {
    display: flex;
    justify-content: center;
    margin: 16px 0 20px;
}

.dial-ring {
    width: 210px;
    height: 210px;
    border-radius: 50%;
    padding: 11px;
    background: conic-gradient(from 180deg, var(--brand-red), #ff4d57, var(--brand-red));
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 40px rgba(227, 6, 19, 0.35);
    transition: all 0.4s ease;
}

.dial-inner {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: #080d19;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.temp-label {
    font-size: 0.72rem;
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    font-weight: 700;
}

.temp-value {
    font-size: 2.8rem;
    font-weight: 800;
    color: #ffffff;
    line-height: 1.1;
    margin: 4px 0;
}

.temp-saving {
    font-size: 0.78rem;
    color: #4ade80;
    font-weight: 700;
}

/* Sıcaklık Kontrolleri & Preset Çipleri */
.thermostat-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 18px;
}

.ctrl-btn {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    background: rgba(255, 255, 255, 0.06);
    color: #ffffff;
    font-size: 1.4rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.ctrl-btn:hover {
    background: var(--brand-red);
    border-color: var(--brand-red);
    transform: scale(1.06);
}

.temp-presets {
    display: flex;
    gap: 6px;
    align-items: center;
    justify-content: center;
    flex: 1;
}

.preset-chip {
    padding: 7px 11px;
    border-radius: 99px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #cbd5e1;
    font-size: 0.78rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.preset-chip:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
}

.preset-chip.active {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    color: #ffffff;
}

/* Canlı Telemetri & Verimlilik Göstergesi */
.thermo-telemetry {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 12px 14px;
    margin-bottom: 16px;
}

.telemetry-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    margin-bottom: 8px;
    gap: 8px;
}

.tele-label {
    color: #94a3b8;
    font-size: 0.8rem;
}

.tele-val {
    color: #38bdf8;
    font-weight: 700;
    font-size: 0.84rem;
}

.telemetry-bar-wrap {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 99px;
    overflow: hidden;
}

.telemetry-bar {
    height: 100%;
    background: linear-gradient(90deg, #22c55e, #38bdf8);
    border-radius: 99px;
    transition: width 0.4s ease, background 0.4s ease;
}

/* Doğrudan Aksiyon CTA Butonu */
.btn-thermo-action {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 13px 20px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--brand-red), #ff2a36);
    color: #ffffff;
    font-weight: 700;
    font-size: 0.94rem;
    box-shadow: 0 8px 22px rgba(227, 6, 19, 0.35);
    margin-bottom: 16px;
    transition: all 0.25s ease;
}

.btn-thermo-action:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(227, 6, 19, 0.55);
    color: #ffffff;
}

.action-arrow {
    font-size: 1.15rem;
    transition: transform 0.2s ease;
}

.btn-thermo-action:hover .action-arrow {
    transform: translateX(4px);
}

/* Hızlı İletişim Numaraları (Sadece İki Numara) */
.thermo-phones-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    padding-top: 14px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.thermo-phone-card {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 10px;
    padding: 7px 10px;
    justify-content: space-between;
    gap: 6px;
    transition: all 0.2s ease;
}

.thermo-phone-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

.phone-direct-btn {
    color: #ffffff;
    font-weight: 700;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 4px;
}

.phone-direct-btn:hover {
    color: #38bdf8;
}

.wa-direct-btn {
    background: #22c55e;
    color: #ffffff;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(34, 197, 94, 0.4);
    transition: transform 0.2s ease, background 0.2s ease;
}

.wa-direct-btn:hover {
    transform: scale(1.1);
    background: #16a34a;
}

/* Brands Bar (Koyu Cam Bant) */
.brands-bar {
    position: relative;
    z-index: 1;
    background: rgba(10, 15, 28, 0.45);
    border-bottom: 1px solid var(--border);
    padding: 32px 0;
    backdrop-filter: blur(10px);
}

.brands-title {
    text-align: center;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 1.6px;
    color: #94a3b8;
    margin-bottom: 20px;
}

.brands-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
}

.brand-badge {
    padding: 10px 22px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.09);
    font-weight: 800;
    font-size: 0.88rem;
    letter-spacing: 0.8px;
    color: #e2e8f0;
    transition: all 0.25s ease;
}

.brand-badge:hover {
    background: rgba(227, 6, 19, 0.15);
    border-color: var(--brand-red);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(227, 6, 19, 0.25);
}

/* Sections */
.section {
    position: relative;
    z-index: 1;
    padding: 92px 0;
}

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 56px;
}

.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 1.5px;
    color: var(--brand-red-light);
    margin-bottom: 12px;
    background: rgba(227, 6, 19, 0.12);
    padding: 4px 12px;
    border-radius: 6px;
    border: 1px solid rgba(227, 6, 19, 0.25);
}

.section-header h2 {
    font-size: clamp(1.85rem, 3vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 14px;
    color: #ffffff;
    line-height: 1.2;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.05rem;
}

/* Services Grid (6 Faaliyet Alanı - Koyu Kartlar) */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
    gap: 28px;
}

.service-card {
    background: var(--surface-glass);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.service-card.card-heat:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px -10px rgba(227, 6, 19, 0.28);
    border-color: rgba(227, 6, 19, 0.5);
    background: var(--surface-glass-hover);
}

.service-card.card-cool:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px -10px rgba(0, 75, 147, 0.35);
    border-color: rgba(56, 189, 248, 0.5);
    background: var(--surface-glass-hover);
}

.service-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 20px;
}

.icon-red {
    background: rgba(227, 6, 19, 0.16);
    border: 1px solid rgba(227, 6, 19, 0.25);
}

.icon-blue {
    background: rgba(0, 75, 147, 0.22);
    border: 1px solid rgba(0, 75, 147, 0.35);
}

.service-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: #ffffff;
    font-weight: 700;
}

.service-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.service-bullets {
    list-style: none;
    margin-bottom: 20px;
    margin-top: auto;
    padding-top: 14px;
    border-top: 1px dashed rgba(255, 255, 255, 0.1);
    font-size: 0.88rem;
    color: #cbd5e1;
    font-weight: 600;
}

.service-bullets li + li {
    margin-top: 6px;
}

.service-link {
    font-weight: 700;
    font-size: 0.92rem;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.link-red {
    color: #ff4d57;
}

.link-red:hover {
    color: #ff8088;
    transform: translateX(4px);
}

.link-blue {
    color: #38bdf8;
}

.link-blue:hover {
    color: #7dd3fc;
    transform: translateX(4px);
}

/* Process Section (Çalışma Sürecimiz) */
.process-section {
    background: rgba(9, 14, 26, 0.45);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(10px);
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.process-step {
    background: var(--surface-glass);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    position: relative;
    backdrop-filter: blur(14px);
    transition: transform 0.25s ease, border-color 0.25s ease;
}

.process-step:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.18);
}

.step-num {
    font-size: 2.2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--brand-red-light), #38bdf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 12px;
    font-family: inherit;
}

.process-step h3 {
    font-size: 1.18rem;
    margin-bottom: 8px;
    color: #ffffff;
}

.process-step p {
    font-size: 0.92rem;
    color: var(--text-muted);
}

/* Portfolio / Tamamlanan Projeler */
.portfolio-filters {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 36px;
}

.filter-btn {
    padding: 10px 20px;
    border-radius: 99px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.04);
    font-family: inherit;
    font-weight: 700;
    font-size: 0.9rem;
    color: #cbd5e1;
    cursor: pointer;
    transition: all 0.2s ease;
}

.filter-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.2);
}

.filter-btn.active {
    background: var(--brand-red);
    color: #fff;
    border-color: var(--brand-red);
    box-shadow: 0 4px 16px rgba(227, 6, 19, 0.4);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 28px;
}

.portfolio-card {
    background: var(--surface-glass);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    backdrop-filter: blur(14px);
}

.portfolio-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(255, 255, 255, 0.18);
}

.portfolio-visual {
    height: 195px;
    padding: 22px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    color: #fff;
    position: relative;
}

.visual-heat {
    background: linear-gradient(135deg, #7f1d1d 0%, #b91c1c 50%, #e30613 100%);
}

.visual-cool {
    background: linear-gradient(135deg, #091325 0%, #004b93 100%);
}

.visual-mixed {
    background: linear-gradient(135deg, #881337 0%, #1e3a8a 100%);
}

.proj-badge {
    align-self: flex-start;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(8px);
    padding: 6px 14px;
    border-radius: 99px;
    font-size: 0.78rem;
    font-weight: 700;
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.visual-icon {
    font-size: 2.8rem;
}

.visual-meta {
    font-size: 0.85rem;
    font-weight: 600;
    opacity: 0.95;
    background: rgba(0, 0, 0, 0.35);
    padding: 4px 10px;
    border-radius: 6px;
    display: inline-block;
    align-self: flex-start;
}

.portfolio-body {
    padding: 24px;
}

.portfolio-body h3 {
    font-size: 1.18rem;
    margin-bottom: 8px;
    color: #ffffff;
}

.portfolio-body p {
    font-size: 0.92rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.proj-tags {
    display: flex;
    justify-content: space-between;
    font-size: 0.82rem;
    font-weight: 700;
    color: #cbd5e1;
    padding-top: 14px;
    border-top: 1px solid var(--border);
}

/* Dark Section / Calculator */
.section-dark {
    background: rgba(8, 12, 22, 0.45);
    color: #fff;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.why-grid {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 52px;
    align-items: center;
}

.why-content h2 {
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    margin-bottom: 16px;
    color: #ffffff;
}

.why-content > p {
    color: #cbd5e1;
    margin-bottom: 32px;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.feature-row {
    display: flex;
    gap: 16px;
}

.feat-check {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--brand-red), var(--brand-blue-accent));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(227, 6, 19, 0.3);
}

.feature-row h4 {
    font-size: 1.08rem;
    margin-bottom: 4px;
    color: #ffffff;
}

.feature-row p {
    color: #94a3b8;
    font-size: 0.92rem;
}

.calculator-box {
    background: rgba(16, 24, 43, 0.88);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 24px;
    padding: 34px;
    backdrop-filter: blur(18px);
    box-shadow: 0 25px 50px -15px rgba(0, 0, 0, 0.65);
}

.calculator-box h3 {
    font-size: 1.35rem;
    margin-bottom: 8px;
    color: #ffffff;
}

.calculator-box > p {
    color: #cbd5e1;
    font-size: 0.9rem;
    margin-bottom: 22px;
}

.calc-group {
    margin-bottom: 20px;
}

.calc-group label {
    display: block;
    font-size: 0.9rem;
    margin-bottom: 8px;
    color: #e2e8f0;
}

.calc-group input[type="range"] {
    width: 100%;
    accent-color: var(--brand-red);
    cursor: pointer;
}

.range-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: #94a3b8;
    margin-top: 4px;
}

.calc-group select {
    width: 100%;
    padding: 12px 14px;
    border-radius: 12px;
    background: #080d19;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.18);
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
}

.calc-group select:focus {
    border-color: #38bdf8;
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}

.calc-result {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    background: rgba(8, 12, 22, 0.8);
    padding: 18px;
    border-radius: 14px;
    margin: 20px 0 14px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.res-item span {
    display: block;
    font-size: 0.78rem;
    color: #94a3b8;
    margin-bottom: 4px;
}

.res-item strong {
    font-size: 1.2rem;
    color: #fff;
    display: block;
}

.res-item strong.highlight {
    color: #4ade80;
    font-size: 1.3rem;
}

.calc-note {
    background: rgba(37, 99, 235, 0.15);
    border-left: 3px solid #38bdf8;
    padding: 12px 14px;
    border-radius: 8px;
    font-size: 0.83rem;
    color: #e2e8f0;
    margin-bottom: 20px;
}

/* Testimonials */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 28px;
}

.testimonial-card {
    background: var(--surface-glass);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(14px);
    transition: transform 0.25s ease, border-color 0.25s ease;
}

.testimonial-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.16);
}

.stars {
    color: #f59e0b;
    font-size: 1.2rem;
    letter-spacing: 2px;
    margin-bottom: 14px;
}

.testimonial-text {
    color: #cbd5e1;
    font-size: 0.95rem;
    font-style: italic;
    line-height: 1.6;
    margin-bottom: 22px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--brand-red);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.9rem;
    box-shadow: 0 4px 10px rgba(227, 6, 19, 0.35);
}

.avatar-blue {
    background: var(--brand-blue-accent);
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.35);
}

.testimonial-author strong {
    display: block;
    font-size: 0.95rem;
    color: #ffffff;
}

.testimonial-author span {
    font-size: 0.8rem;
    color: #94a3b8;
}

/* FAQ Section */
.faq-section {
    background: rgba(9, 14, 26, 0.45);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(10px);
}

.faq-container {
    max-width: 860px;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.faq-item {
    background: var(--surface-glass);
    border: 1px solid var(--border);
    border-radius: 14px;
    overflow: hidden;
    backdrop-filter: blur(14px);
    transition: border-color 0.25s ease;
}

.faq-item:hover,
.faq-item.active {
    border-color: rgba(227, 6, 19, 0.4);
}

.faq-question {
    width: 100%;
    padding: 20px 24px;
    background: none;
    border: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    text-align: left;
    font-family: inherit;
    font-size: 1.02rem;
    font-weight: 700;
    color: #ffffff;
    cursor: pointer;
}

.faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(227, 6, 19, 0.18);
    color: var(--brand-red-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    flex-shrink: 0;
}

.faq-answer {
    display: none;
    padding: 0 24px 20px;
    color: #cbd5e1;
    font-size: 0.95rem;
    line-height: 1.6;
}

.faq-item.active .faq-answer {
    display: block;
}

/* Contact Section */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 56px;
    align-items: start;
}

.contact-info h2 {
    font-size: 2.1rem;
    margin-bottom: 14px;
    color: #ffffff;
}

.contact-info > p {
    color: var(--text-muted);
    margin-bottom: 32px;
}

.info-cards {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--surface-glass);
    padding: 20px 22px;
    border-radius: 16px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    backdrop-filter: blur(14px);
}

.info-icon {
    font-size: 1.6rem;
}

.person-details {
    flex: 1;
}

.person-details strong {
    font-size: 1.08rem;
    display: block;
    color: #ffffff;
}

.person-phone {
    font-size: 1.15rem;
    font-weight: 800;
    color: #38bdf8;
    margin: 2px 0 10px;
}

.person-phone a {
    color: #38bdf8;
}

.person-phone a:hover {
    color: #ffffff;
}

.person-actions {
    display: flex;
    gap: 10px;
}

.mini-btn {
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 0.82rem;
    font-weight: 700;
    color: #fff;
}

.mini-call {
    background: var(--brand-blue-accent);
}

.mini-call:hover {
    background: #1d4ed8;
}

.mini-wa {
    background: var(--whatsapp);
}

.mini-wa:hover {
    background: var(--whatsapp-hover);
}

.contact-form {
    background: rgba(16, 24, 43, 0.92);
    padding: 40px;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(20px);
}

.contact-form h3 {
    font-size: 1.4rem;
    margin-bottom: 24px;
    color: #ffffff;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.88rem;
    margin-bottom: 6px;
    color: #e2e8f0;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    background: #080d19;
    color: #ffffff;
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: all 0.2s ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #64748b;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: #38bdf8;
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

.form-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.form-status {
    margin-top: 14px;
    font-weight: 600;
    font-size: 0.92rem;
    text-align: center;
    color: #4ade80;
}

/* Footer (Derin Gece / Obsidyen) */
.footer {
    position: relative;
    z-index: 1;
    background: var(--bg-darker);
    color: #94a3b8;
    padding: 68px 0 28px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-inner {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1.1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand p {
    margin-top: 16px;
    max-width: 360px;
    font-size: 0.92rem;
    color: #cbd5e1;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links h4 {
    color: #fff;
    margin-bottom: 6px;
    font-size: 1.05rem;
}

.footer-links a {
    color: #94a3b8;
}

.footer-links a:hover {
    color: #38bdf8;
    transform: translateX(3px);
}

.footer-bottom {
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    font-size: 0.85rem;
    color: #64748b;
}

.footer-bottom strong {
    color: #cbd5e1;
}

/* Sağ Alt Sabit WhatsApp Butonları */
.floating-actions {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: flex-end;
}

.float-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 11px 16px;
    border-radius: 999px;
    color: #fff;
    font-weight: 700;
    font-size: 0.85rem;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.5);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.float-btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.6);
}

.float-wa {
    background: linear-gradient(135deg, #22c55e, #16a34a);
}

.float-call {
    background: linear-gradient(135deg, var(--brand-blue-accent), #0284c7);
}

.float-icon {
    font-size: 1.1rem;
}

/* Mobil Hamburger Menü */
.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}

.mobile-toggle span {
    display: block;
    width: 24px;
    height: 2.5px;
    background: #ffffff;
    border-radius: 2px;
}

/* Responsive Düzenlemeler */
@media (max-width: 1200px) {
    .heating-flank {
        opacity: 0.32;
        width: 180px;
    }
}

@media (max-width: 960px) {
    .hero-grid,
    .why-grid,
    .contact-wrapper,
    .footer-inner {
        grid-template-columns: 1fr;
    }

    .mobile-toggle {
        display: flex;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #0c1322;
        flex-direction: column;
        padding: 20px 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
    }

    .nav-links.open {
        display: flex;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .asberk-logo-svg {
        height: 48px;
    }

    .float-label {
        font-size: 0.78rem;
    }

    .heating-flank.flank-left,
    .heating-flank.flank-right {
        opacity: 0.45;
        width: 50vw;
    }
}

@media (max-width: 640px) {
    .heating-flank.flank-left,
    .heating-flank.flank-right {
        opacity: 0.35;
        width: 50vw;
    }
    
    .hero {
        padding: 60px 0 70px;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .thermostat-dial .dial-ring {
        width: 190px;
        height: 190px;
    }
    
    .temp-value {
        font-size: 2.2rem;
    }

    .floating-actions {
        right: 12px;
        bottom: 12px;
    }

    .float-btn {
        padding: 9px 13px;
        font-size: 0.78rem;
    }
}