/* ==========================================================================
   AZAK KLİMA | VRF/VRV İKLİMLENDİRME SİSTEMLERİ - 2026 MODERN B2B THEME
   Corporate Palette: AZAK Blue (#004085), Action Red (#E30613), Dark Slate (#0F172A)
   ========================================================================== */

:root {
    --azak-blue: #004085;
    --azak-blue-dark: #002b5c;
    --azak-blue-light: #0056b3;
    --azak-accent: #0ea5e9;
    --azak-red: #e30613;
    --azak-red-hover: #b8040e;
    --azak-slate-900: #0f172a;
    --azak-slate-800: #1e293b;
    --azak-slate-700: #334155;
    --azak-slate-600: #475569;
    --azak-slate-500: #64748b;
    --azak-slate-400: #94a3b8;
    --azak-slate-200: #e2e8f0;
    --azak-slate-100: #f1f5f9;
    --azak-slate-50: #f8fafc;
    --white: #ffffff;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
    --shadow-xl: 0 20px 30px -8px rgba(0, 64, 133, 0.15);
    --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    color: var(--azak-slate-800);
    background-color: var(--white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ==========================================================================
   TOPBAR & HEADER
   ========================================================================== */
.topbar {
    background-color: var(--azak-slate-900);
    color: var(--azak-slate-400);
    font-size: 0.85rem;
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.topbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}
.topbar-info {
    display: flex;
    align-items: center;
    gap: 20px;
}
.topbar-info a {
    color: var(--azak-slate-200);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.topbar-info a:hover {
    color: var(--white);
}
.topbar-badge {
    background: rgba(227, 6, 19, 0.2);
    color: #ff6b75;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    border: 1px solid rgba(227, 6, 19, 0.4);
}
.topbar-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Sticky Main Navigation - 2026 Modern Sleek Design */
.header-main {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(0, 64, 133, 0.08);
    box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
    transition: var(--transition);
}
.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 32px;
    max-width: 1480px;
    margin: 0 auto;
    gap: 24px;
}
.brand-logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    margin-right: 18px;
}
.brand-logo img {
    height: 48px;
    width: auto;
    object-fit: contain;
    transition: transform 0.2s ease;
}
.brand-logo:hover img {
    transform: scale(1.02);
}

.header-nav {
    display: flex;
    align-items: center;
    flex: 1;
    justify-content: center;
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
    margin: 0;
    padding: 0;
}
.nav-link {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--azak-slate-700);
    padding: 8px 14px;
    border-radius: 8px;
    white-space: nowrap;
    display: inline-block;
    transition: all 0.2s ease;
    letter-spacing: -0.2px;
    position: relative;
}
.nav-link:hover {
    color: var(--azak-blue);
    background: #f1f5f9;
}
.nav-link.active {
    color: var(--azak-blue);
    background: #eef5fc;
    font-weight: 700;
}
.nav-link::after {
    display: none;
}

.header-cta-group {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
}

/* Modern Hotline Badge */
.btn-hotline {
    display: flex;
    align-items: center;
    gap: 10px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    padding: 6px 16px 6px 8px;
    border-radius: 50px;
    text-decoration: none;
    transition: all 0.25s ease;
    white-space: nowrap;
}
.btn-hotline:hover {
    background: #eef5fc;
    border-color: #cbd5e1;
    box-shadow: 0 4px 12px rgba(0, 64, 133, 0.08);
    transform: translateY(-1px);
}
.btn-hotline-icon {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: rgba(227, 6, 19, 0.1);
    color: var(--azak-red);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    transition: all 0.25s ease;
}
.btn-hotline:hover .btn-hotline-icon {
    background: var(--azak-red);
    color: var(--white);
    transform: scale(1.05);
}
.btn-hotline-text {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
}
.hotline-label {
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--azak-slate-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.hotline-number {
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--azak-blue);
    letter-spacing: -0.3px;
}

/* Modern CTA Button */
.btn-cta-primary {
    background: linear-gradient(135deg, #e30613 0%, #c4040f 100%);
    color: var(--white);
    padding: 10px 22px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    box-shadow: 0 4px 14px rgba(227, 6, 19, 0.35);
    border: none;
    cursor: pointer;
    transition: all 0.25s ease;
    letter-spacing: 0.2px;
}
.btn-cta-primary:hover {
    background: linear-gradient(135deg, #f00817 0%, #aa030d 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 22px rgba(227, 6, 19, 0.45);
    color: var(--white);
}

.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--azak-slate-800);
    cursor: pointer;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
    position: relative;
    background: linear-gradient(135deg, #07172f 0%, #004085 65%, #002b5c 100%);
    color: var(--white);
    padding: 85px 0 95px;
    overflow: hidden;
}
.hero-pattern {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px);
    background-size: 32px 32px;
    opacity: 0.6;
    pointer-events: none;
}
.hero-glow {
    position: absolute;
    top: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.25) 0%, rgba(0, 64, 133, 0) 70%);
    border-radius: 50%;
    pointer-events: none;
}
.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 48px;
    align-items: center;
    position: relative;
    z-index: 2;
}
.hero-badge-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.25);
    padding: 6px 16px;
    border-radius: 30px;
    font-size: 0.82rem;
    font-weight: 600;
    color: #38bdf8;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.hero-title {
    font-size: 3.1rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -1px;
}
.hero-title span {
    color: #ff4d5a;
    background: linear-gradient(90deg, #ff4d5a, #ffa07a);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero-description {
    font-size: 1.12rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 34px;
    max-width: 580px;
}
.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 40px;
}
.btn-hero-primary {
    background: var(--azak-red);
    color: var(--white);
    padding: 14px 30px;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 8px 24px rgba(227, 6, 19, 0.4);
}
.btn-hero-primary:hover {
    background: var(--azak-red-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(227, 6, 19, 0.5);
    color: var(--white);
}
.btn-hero-secondary {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: var(--white);
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    backdrop-filter: blur(8px);
}
.btn-hero-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: var(--white);
    color: var(--white);
}

.hero-stats-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding-top: 28px;
}
.stat-item h3 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--white);
    line-height: 1;
    margin-bottom: 4px;
}
.stat-item p {
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hero-media-card {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-lg);
    padding: 24px;
    backdrop-filter: blur(16px);
    position: relative;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35);
}
.hero-media-card img {
    border-radius: var(--radius-md);
    width: 100%;
    height: 380px;
    object-fit: contain;
    background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, rgba(0,0,0,0.2) 100%);
}
.hero-floating-badge {
    position: absolute;
    bottom: -15px;
    left: -15px;
    background: var(--white);
    color: var(--azak-slate-900);
    padding: 14px 20px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 14px;
    border: 1px solid var(--azak-slate-200);
}
.floating-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: #e0f2fe;
    color: #0284c7;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}
.floating-text strong {
    display: block;
    font-size: 0.95rem;
    color: var(--azak-blue);
}
.floating-text span {
    font-size: 0.8rem;
    color: var(--azak-slate-600);
}

/* ==========================================================================
   INTERACTIVE CAPACITY CALCULATOR (B2B SIZING TOOL)
   ========================================================================== */
.calculator-section {
    padding: 80px 0;
    background: var(--azak-slate-50);
    position: relative;
}
.section-header {
    text-align: center;
    max-width: 780px;
    margin: 0 auto 50px;
}
.section-subtitle {
    display: inline-block;
    color: var(--azak-red);
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 10px;
}
.section-title {
    font-size: 2.35rem;
    font-weight: 800;
    color: var(--azak-slate-900);
    line-height: 1.25;
    margin-bottom: 14px;
    letter-spacing: -0.5px;
}
.section-desc {
    font-size: 1.05rem;
    color: var(--azak-slate-600);
    line-height: 1.6;
}

.calc-card-container {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--azak-slate-200);
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    overflow: hidden;
}
.calc-inputs-pane {
    padding: 42px;
}
.calc-field-group {
    margin-bottom: 28px;
}
.calc-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--azak-slate-800);
    margin-bottom: 10px;
}
.calc-label span.hint {
    font-weight: 400;
    font-size: 0.82rem;
    color: var(--azak-slate-500);
}

/* Building Type Selector Grid */
.building-types-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}
.building-type-btn {
    border: 2px solid var(--azak-slate-200);
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 14px 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}
.building-type-btn i {
    font-size: 1.4rem;
    color: var(--azak-blue);
    transition: var(--transition);
}
.building-type-btn span.type-title {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--azak-slate-800);
}
.building-type-btn span.type-sub {
    font-size: 0.72rem;
    color: var(--azak-slate-500);
}
.building-type-btn:hover {
    border-color: var(--azak-blue-light);
    background: #f0f7ff;
}
.building-type-btn.active {
    border-color: var(--azak-blue);
    background: #eef5fc;
    box-shadow: 0 0 0 3px rgba(0, 64, 133, 0.15);
}
.building-type-btn.active i {
    color: var(--azak-red);
    transform: scale(1.1);
}

/* Range Slider & Input */
.range-slider-wrapper {
    display: flex;
    align-items: center;
    gap: 18px;
}
.range-slider {
    flex: 1;
    -webkit-appearance: none;
    height: 8px;
    border-radius: 4px;
    background: var(--azak-slate-200);
    outline: none;
}
.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--azak-blue);
    border: 3px solid var(--white);
    box-shadow: 0 2px 6px rgba(0,0,0,0.25);
    cursor: pointer;
    transition: var(--transition);
}
.range-slider::-webkit-slider-thumb:hover {
    background: var(--azak-red);
    transform: scale(1.15);
}
.calc-num-input {
    width: 110px;
    padding: 10px 14px;
    border: 2px solid var(--azak-slate-200);
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 1rem;
    color: var(--azak-slate-900);
    text-align: right;
    outline: none;
}
.calc-num-input:focus {
    border-color: var(--azak-blue);
}

.calc-select-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.custom-select {
    width: 100%;
    padding: 12px 14px;
    border: 2px solid var(--azak-slate-200);
    border-radius: var(--radius-sm);
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--azak-slate-700);
    background: var(--white);
    outline: none;
    cursor: pointer;
}
.custom-select:focus {
    border-color: var(--azak-blue);
}

/* Results Output Pane */
.calc-results-pane {
    background: linear-gradient(145deg, #0b1f3c 0%, #004085 100%);
    color: var(--white);
    padding: 42px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
}
.results-header {
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    padding-bottom: 18px;
    margin-bottom: 24px;
}
.results-header span {
    color: #38bdf8;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.results-header h3 {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--white);
}

.result-metric-card {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-md);
    padding: 18px;
    margin-bottom: 16px;
}
.metric-label {
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 4px;
}
.metric-val {
    font-size: 2rem;
    font-weight: 800;
    color: var(--white);
    display: flex;
    align-items: baseline;
    gap: 6px;
}
.metric-val span.unit {
    font-size: 1rem;
    font-weight: 600;
    color: #ff6b75;
}
.metric-sub {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.75);
    margin-top: 4px;
}

.recommendation-box {
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-md);
    padding: 16px;
    margin-bottom: 24px;
}
.rec-row {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
}
.rec-row:last-child {
    margin-bottom: 0;
}
.rec-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.12);
    color: #38bdf8;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    flex-shrink: 0;
}
.rec-text strong {
    display: block;
    font-size: 0.88rem;
    color: var(--white);
}
.rec-text span {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.75);
}

.btn-use-capacity {
    background: var(--azak-red);
    color: var(--white);
    width: 100%;
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.98rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 6px 20px rgba(227, 6, 19, 0.4);
}
.btn-use-capacity:hover {
    background: var(--azak-red-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(227, 6, 19, 0.5);
    color: var(--white);
}

/* ==========================================================================
   SEKTÖREL ÇÖZÜMLER (VERTICALS)
   ========================================================================== */
.sectors-section {
    padding: 85px 0;
    background: var(--white);
}
.sectors-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.sector-card {
    background: var(--white);
    border: 1px solid var(--azak-slate-200);
    border-radius: var(--radius-lg);
    padding: 30px 24px;
    transition: var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
}
.sector-card:hover {
    transform: translateY(-6px);
    border-color: var(--azak-blue-light);
    box-shadow: var(--shadow-xl);
}
.sector-icon-wrap {
    width: 58px;
    height: 58px;
    border-radius: var(--radius-md);
    background: #eef5fc;
    color: var(--azak-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin-bottom: 22px;
    transition: var(--transition);
}
.sector-card:hover .sector-icon-wrap {
    background: var(--azak-red);
    color: var(--white);
}
.sector-title {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--azak-slate-900);
    margin-bottom: 12px;
}
.sector-desc {
    font-size: 0.92rem;
    color: var(--azak-slate-600);
    line-height: 1.65;
    margin-bottom: 20px;
    flex-grow: 1;
}
.sector-features {
    list-style: none;
    margin-bottom: 22px;
}
.sector-features li {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--azak-slate-700);
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}
.sector-features li i {
    color: #16a34a;
    font-size: 0.85rem;
}
.sector-link {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--azak-blue);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.sector-link:hover {
    color: var(--azak-red);
    gap: 10px;
}

/* ==========================================================================
   PRODUCT CATALOG (DINAMIK ÜRÜNLER)
   ========================================================================== */
.catalog-section {
    padding: 85px 0;
    background: var(--azak-slate-50);
}
.catalog-filter-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}
.cat-tab-btn {
    background: var(--white);
    border: 1px solid var(--azak-slate-200);
    padding: 10px 22px;
    border-radius: 30px;
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--azak-slate-700);
    cursor: pointer;
    transition: var(--transition);
}
.cat-tab-btn:hover {
    border-color: var(--azak-blue);
    color: var(--azak-blue);
}
.cat-tab-btn.active {
    background: var(--azak-blue);
    border-color: var(--azak-blue);
    color: var(--white);
    box-shadow: 0 4px 14px rgba(0, 64, 133, 0.25);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.product-card {
    background: var(--white);
    border: 1px solid var(--azak-slate-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}
.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(0, 64, 133, 0.3);
}
.product-image-box {
    position: relative;
    background: #ffffff;
    height: 250px;
    padding: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--azak-slate-100);
}
.product-image-box img {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
    transition: transform 0.3s ease;
}
.product-card:hover .product-image-box img {
    transform: scale(1.05);
}
.product-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    background: var(--azak-blue);
    color: var(--white);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}
.product-content {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}
.product-sku {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--azak-slate-400);
    margin-bottom: 6px;
    text-transform: uppercase;
}
.product-name {
    font-size: 1.18rem;
    font-weight: 800;
    color: var(--azak-slate-900);
    margin-bottom: 10px;
    line-height: 1.35;
}
.product-short-desc {
    font-size: 0.88rem;
    color: var(--azak-slate-600);
    line-height: 1.55;
    margin-bottom: 18px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.product-caps-preview {
    margin-top: auto;
    margin-bottom: 20px;
    padding-top: 14px;
    border-top: 1px dashed var(--azak-slate-200);
}
.caps-label {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--azak-slate-500);
    margin-bottom: 6px;
    display: block;
}
.caps-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.cap-badge {
    background: #eef2f6;
    color: var(--azak-blue);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 4px;
}

.product-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}
.btn-prod-quote {
    background: var(--azak-red);
    color: var(--white);
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.85rem;
    text-align: center;
    transition: var(--transition);
}
.btn-prod-quote:hover {
    background: var(--azak-red-hover);
    color: var(--white);
}
.btn-prod-detail {
    background: var(--white);
    border: 1px solid var(--azak-slate-300);
    color: var(--azak-slate-700);
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.85rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}
.btn-prod-detail:hover {
    background: var(--azak-slate-100);
    color: var(--azak-blue);
    border-color: var(--azak-blue);
}

/* ==========================================================================
   VRF vs VRV vs VRS COMPARISON MATRIX
   ========================================================================== */
.comparison-section {
    padding: 85px 0;
    background: var(--white);
}
.table-responsive {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--azak-slate-200);
}
.comparison-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}
.comparison-table th {
    background: var(--azak-slate-900);
    color: var(--white);
    padding: 18px 24px;
    font-size: 1rem;
    font-weight: 800;
}
.comparison-table th.col-vrf {
    background: var(--azak-blue);
    color: var(--white);
    border-top: 4px solid var(--azak-red);
}
.comparison-table td {
    padding: 18px 24px;
    border-bottom: 1px solid var(--azak-slate-200);
    font-size: 0.92rem;
    color: var(--azak-slate-700);
}
.comparison-table tr:nth-child(even) {
    background-color: var(--azak-slate-50);
}
.comparison-table tr:hover {
    background-color: #f0f7ff;
}
.comparison-table td.cell-highlight {
    background-color: rgba(0, 64, 133, 0.04);
    font-weight: 700;
    color: var(--azak-blue);
}

/* ==========================================================================
   ENGINEERING & KEŞİF TALEP FORMU (WITH DRAG & DROP DWG UPLOAD)
   ========================================================================== */
.form-section {
    padding: 85px 0;
    background: linear-gradient(135deg, #071830 0%, #004085 100%);
    color: var(--white);
    position: relative;
}
.form-card-container {
    max-width: 960px;
    margin: 0 auto;
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 50px;
    box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.4);
    color: var(--azak-slate-800);
}
.form-inner-header {
    text-align: center;
    margin-bottom: 36px;
}
.form-inner-header h3 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--azak-slate-900);
    margin-bottom: 10px;
}
.form-inner-header p {
    font-size: 0.98rem;
    color: var(--azak-slate-600);
}

.b2b-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.form-group-full {
    grid-column: span 2;
}
.form-input-label {
    display: block;
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--azak-slate-700);
    margin-bottom: 8px;
}
.form-control-input {
    width: 100%;
    padding: 13px 16px;
    border: 2px solid var(--azak-slate-200);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    color: var(--azak-slate-900);
    outline: none;
    transition: var(--transition);
}
.form-control-input:focus {
    border-color: var(--azak-blue);
    box-shadow: 0 0 0 3px rgba(0, 64, 133, 0.1);
}

/* File Upload Drag and Drop Zone */
.file-dropzone {
    border: 2px dashed #94a3b8;
    background: var(--azak-slate-50);
    border-radius: var(--radius-md);
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}
.file-dropzone:hover, .file-dropzone.dragover {
    border-color: var(--azak-blue);
    background: #eef5fc;
}
.dropzone-icon {
    font-size: 2.2rem;
    color: var(--azak-blue);
    margin-bottom: 10px;
}
.dropzone-title {
    font-weight: 700;
    font-size: 0.98rem;
    color: var(--azak-slate-800);
    margin-bottom: 4px;
}
.dropzone-hint {
    font-size: 0.8rem;
    color: var(--azak-slate-500);
}
.file-dropzone input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}
.selected-file-preview {
    margin-top: 12px;
    font-size: 0.85rem;
    font-weight: 700;
    color: #16a34a;
    display: none;
}

.btn-submit-kesif {
    background: var(--azak-red);
    color: var(--white);
    width: 100%;
    padding: 16px 24px;
    border-radius: var(--radius-sm);
    font-size: 1.1rem;
    font-weight: 800;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: var(--transition);
    box-shadow: 0 8px 24px rgba(227, 6, 19, 0.4);
    margin-top: 10px;
}
.btn-submit-kesif:hover {
    background: var(--azak-red-hover);
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(227, 6, 19, 0.5);
    color: var(--white);
}

.form-alert-box {
    display: none;
    padding: 16px;
    border-radius: var(--radius-sm);
    margin-top: 16px;
    font-weight: 600;
    font-size: 0.95rem;
    text-align: center;
}
.form-alert-success {
    background: #dcfce7;
    color: #15803d;
    border: 1px solid #86efac;
}
.form-alert-error {
    background: #fee2e2;
    color: #b91c1c;
    border: 1px solid #fca5a5;
}

/* ==========================================================================
   PRODUCT DETAIL MODAL
   ========================================================================== */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.75);
    backdrop-filter: blur(6px);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    padding: 24px;
}
.modal-container {
    background: var(--white);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 900px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
    padding: 40px;
}
.modal-close-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--azak-slate-100);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--azak-slate-700);
    cursor: pointer;
    transition: var(--transition);
}
.modal-close-btn:hover {
    background: var(--azak-red);
    color: var(--white);
}
.modal-body img {
    max-height: 300px;
    margin: 0 auto 20px;
    object-fit: contain;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer-main {
    background: var(--azak-slate-900);
    color: var(--azak-slate-400);
    padding: 70px 0 30px;
    border-top: 4px solid var(--azak-red);
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: 40px;
    margin-bottom: 50px;
}
.footer-col h4 {
    color: var(--white);
    font-size: 1.1rem;
    font-weight: 800;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}
.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 32px;
    height: 2px;
    background: var(--azak-red);
}
.footer-col ul {
    list-style: none;
}
.footer-col ul li {
    margin-bottom: 10px;
}
.footer-col ul li a {
    color: var(--azak-slate-400);
    font-size: 0.9rem;
}
.footer-col ul li a:hover {
    color: var(--white);
    padding-left: 4px;
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.85rem;
}

/* Responsive Styles - 2026 Mobile & Tablet Optimization */
@media (max-width: 1024px) {
    .hero-grid, .calc-card-container {
        grid-template-columns: 1fr;
    }
    .sectors-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .header-container {
        padding: 10px 20px;
        gap: 16px;
    }
}

@media (max-width: 991px) {
    /* Header Navigation - Mobile Drawer */
    .header-nav {
        display: none;
    }
    .header-nav.mobile-active {
        display: block !important;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: #ffffff;
        box-shadow: 0 16px 32px rgba(15, 23, 42, 0.15);
        border-top: 1px solid #e2e8f0;
        border-bottom: 3px solid var(--azak-red);
        padding: 16px 20px;
        z-index: 9999;
        animation: vrfSlideDown 0.25s ease-out;
    }
    @keyframes vrfSlideDown {
        from { opacity: 0; transform: translateY(-8px); }
        to { opacity: 1; transform: translateY(0); }
    }
    .header-nav.mobile-active .nav-links {
        display: flex !important;
        flex-direction: column;
        gap: 8px;
        width: 100%;
    }
    .header-nav.mobile-active .nav-link {
        display: block;
        padding: 10px 14px;
        background: #f8fafc;
        border-radius: 8px;
        font-size: 0.95rem;
        font-weight: 600;
        color: var(--azak-slate-800);
        border-left: 3px solid transparent;
        white-space: nowrap;
    }
    .header-nav.mobile-active .nav-link:hover,
    .header-nav.mobile-active .nav-link.active {
        background: #eef5fc;
        color: var(--azak-blue);
        border-left-color: var(--azak-red);
    }
    .nav-links, .btn-hotline {
        display: none;
    }
    .mobile-nav-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        background: #f1f5f9;
        border: 1px solid #cbd5e1;
        border-radius: 8px;
        color: var(--azak-slate-800);
        font-size: 1.25rem;
        cursor: pointer;
        flex-shrink: 0;
    }
}

@media (max-width: 768px) {
    /* Topbar Mobile Optimization - Eliminate overflow completely */
    .topbar {
        padding: 6px 0;
        font-size: 0.78rem;
    }
    .topbar-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        flex-wrap: nowrap;
        gap: 8px;
    }
    .topbar-info {
        gap: 8px;
        overflow: hidden;
        white-space: nowrap;
    }
    .topbar-badge,
    .topbar-info a[href^="mailto:"],
    .topbar-info a[href*="0541"] {
        display: none !important;
    }
    .topbar-actions a[href="/admin/"] {
        display: none !important;
    }
    .topbar-actions {
        gap: 8px;
        flex-shrink: 0;
    }
    .topbar-actions a {
        font-size: 0.78rem !important;
        white-space: nowrap;
    }

    /* Header Container Mobile */
    .header-container {
        padding: 8px 16px;
        gap: 10px;
    }
    .brand-logo {
        margin-right: 0;
    }
    .brand-logo img {
        height: 38px;
        max-width: 140px;
    }
    .header-cta-group {
        gap: 8px;
    }
    .btn-cta-primary {
        padding: 8px 12px;
        font-size: 0.78rem;
        white-space: nowrap;
        letter-spacing: 0;
        border-radius: 8px;
    }
    .btn-cta-primary i {
        margin-right: 2px;
    }

    /* Hero & Sections */
    .hero-title {
        font-size: 2.1rem;
    }
    .building-types-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .products-grid, .sectors-grid {
        grid-template-columns: 1fr;
    }
    .b2b-form-grid {
        grid-template-columns: 1fr;
    }
    .form-group-full {
        grid-column: span 1;
    }
    .form-card-container {
        padding: 20px 16px;
    }
    .calc-inputs-pane, .calc-results-pane {
        padding: 20px 16px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .header-container {
        padding: 8px 12px;
        gap: 6px;
    }
    .brand-logo img {
        height: 34px;
        max-width: 125px;
    }
    .btn-cta-primary {
        padding: 7px 10px;
        font-size: 0.74rem;
    }
    .mobile-nav-toggle {
        width: 36px;
        height: 36px;
        font-size: 1.1rem;
    }
}