/*
 * ============================================
 * KARABAĞ TAŞIMACILIK — Main Stylesheet
 * Sky-Azure Premium Design System
 * ============================================
 */

/* ===== FONT IMPORTS ===== */
@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,700;9..144,900&family=Manrope:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ===== ROOT VARIABLES — LIGHT THEME ===== */
:root {
    /* Sky & Azure Palette */
    --sky-50:  #f0f9ff;
    --sky-100: #e0f2fe;
    --sky-200: #bae6fd;
    --sky-300: #7dd3fc;
    --sky-400: #38bdf8;
    --sky-500: #0ea5e9;
    --sky-600: #0284c7;
    --sky-700: #0369a1;
    --sky-800: #075985;
    --sky-900: #0c4a6e;
    --sky-950: #082f49;

    /* Azure Accents */
    --azure-glow: #00d4ff;
    --azure-deep: #006eb8;
    --azure-mist: #c4e9ff;

    /* Gold Accent (premium) */
    --gold: #d4a574;
    --gold-soft: #f5e6d3;
    --gold-deep: #b8854a;

    /* Neutrals */
    --ink-0:   #ffffff;
    --ink-50:  #fafcff;
    --ink-100: #f4f8fc;
    --ink-200: #e6edf5;
    --ink-300: #cbd7e3;
    --ink-400: #94a3b8;
    --ink-500: #64748b;
    --ink-600: #475569;
    --ink-700: #334155;
    --ink-800: #1e293b;
    --ink-900: #0f172a;
    --ink-950: #020617;

    /* Semantic */
    --bg-primary:    var(--ink-50);
    --bg-secondary:  var(--ink-0);
    --bg-tertiary:   var(--sky-50);
    --bg-elevated:   #ffffff;
    --bg-overlay:    rgba(255, 255, 255, 0.85);
    --bg-gradient:   linear-gradient(135deg, var(--sky-50) 0%, var(--ink-0) 50%, var(--azure-mist) 100%);

    --text-primary:   var(--ink-900);
    --text-secondary: var(--ink-700);
    --text-tertiary:  var(--ink-500);
    --text-inverse:   var(--ink-0);
    --text-accent:    var(--sky-700);

    --border-light:  var(--ink-200);
    --border-medium: var(--ink-300);
    --border-strong: var(--ink-400);

    --accent-primary:   var(--sky-500);
    --accent-secondary: var(--azure-glow);
    --accent-hover:     var(--sky-600);

    /* Shadows — soft & layered */
    --shadow-xs: 0 1px 2px rgba(14, 165, 233, 0.04), 0 1px 3px rgba(15, 23, 42, 0.04);
    --shadow-sm: 0 2px 4px rgba(14, 165, 233, 0.05), 0 2px 8px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 4px 12px rgba(14, 165, 233, 0.08), 0 4px 16px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 10px 30px rgba(14, 165, 233, 0.10), 0 10px 40px rgba(15, 23, 42, 0.10);
    --shadow-xl: 0 20px 50px rgba(14, 165, 233, 0.15), 0 20px 60px rgba(15, 23, 42, 0.12);
    --shadow-glow: 0 0 40px rgba(14, 165, 233, 0.25), 0 0 80px rgba(0, 212, 255, 0.15);

    /* Gradients */
    --grad-sky:     linear-gradient(135deg, var(--sky-400) 0%, var(--sky-600) 100%);
    --grad-azure:   linear-gradient(135deg, var(--azure-glow) 0%, var(--sky-700) 100%);
    --grad-deep:    linear-gradient(135deg, var(--sky-700) 0%, var(--sky-950) 100%);
    --grad-mesh:    radial-gradient(at 0% 0%, var(--sky-200) 0%, transparent 50%),
                    radial-gradient(at 100% 0%, var(--azure-mist) 0%, transparent 50%),
                    radial-gradient(at 50% 100%, var(--sky-100) 0%, transparent 50%);
    --grad-text:    linear-gradient(135deg, var(--sky-600) 0%, var(--azure-glow) 50%, var(--sky-800) 100%);
    --grad-gold:    linear-gradient(135deg, var(--gold-soft) 0%, var(--gold) 50%, var(--gold-deep) 100%);

    /* Typography */
    --font-display: 'Fraunces', 'Georgia', serif;
    --font-body:    'Manrope', system-ui, sans-serif;
    --font-mono:    'JetBrains Mono', monospace;

    /* Spacing scale (8pt grid) */
    --space-1:  4px;
    --space-2:  8px;
    --space-3:  12px;
    --space-4:  16px;
    --space-5:  20px;
    --space-6:  24px;
    --space-8:  32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    --space-24: 96px;
    --space-32: 128px;

    /* Radii */
    --radius-xs:   4px;
    --radius-sm:   8px;
    --radius-md:   12px;
    --radius-lg:   20px;
    --radius-xl:   28px;
    --radius-2xl:  36px;
    --radius-full: 9999px;

    /* Transitions */
    --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --t-fast:   180ms;
    --t-normal: 320ms;
    --t-slow:   600ms;

    /* Layout */
    --container-xl: 1280px;
    --container-lg: 1120px;
    --container-md: 960px;
    --header-h:     84px;
    --z-header:     100;
    --z-overlay:    200;
    --z-modal:      300;
    --z-preloader:  999;
}

/* ===== DARK THEME ===== */
[data-theme="dark"] {
    --bg-primary:    #050b18;
    --bg-secondary:  #0a1424;
    --bg-tertiary:   #0f1d33;
    --bg-elevated:   #111e36;
    --bg-overlay:    rgba(10, 20, 36, 0.85);
    --bg-gradient:   linear-gradient(135deg, #050b18 0%, #0a1424 50%, #0f1d33 100%);

    --text-primary:   #e8f2ff;
    --text-secondary: #b8cce0;
    --text-tertiary:  #7d92ad;
    --text-inverse:   #050b18;
    --text-accent:    var(--sky-300);

    --border-light:  rgba(125, 211, 252, 0.12);
    --border-medium: rgba(125, 211, 252, 0.20);
    --border-strong: rgba(125, 211, 252, 0.32);

    --accent-primary:   var(--sky-400);
    --accent-secondary: var(--azure-glow);
    --accent-hover:     var(--sky-300);

    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.40), 0 0 0 1px rgba(125, 211, 252, 0.05);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.50), 0 0 0 1px rgba(125, 211, 252, 0.08);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.60), 0 0 0 1px rgba(125, 211, 252, 0.10);
    --shadow-glow: 0 0 60px rgba(56, 189, 248, 0.35), 0 0 120px rgba(0, 212, 255, 0.20);

    --grad-mesh: radial-gradient(at 0% 0%, rgba(14, 165, 233, 0.25) 0%, transparent 50%),
                 radial-gradient(at 100% 0%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
                 radial-gradient(at 50% 100%, rgba(56, 189, 248, 0.12) 0%, transparent 50%);
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    transition: background var(--t-normal) var(--ease-out), color var(--t-normal) var(--ease-out);
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--t-fast) var(--ease-out);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* ===== CONTAINER ===== */
.container {
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.container-narrow { max-width: var(--container-md); }
.container-medium { max-width: var(--container-lg); }

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

h1 { font-size: clamp(2.5rem, 6vw, 5rem); font-weight: 500; }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); }
h3 { font-size: clamp(1.5rem, 2.5vw, 2.25rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.75rem); }

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent-primary);
    padding: var(--space-2) var(--space-4);
    background: var(--sky-100);
    border-radius: var(--radius-full);
    border: 1px solid var(--sky-200);
}

[data-theme="dark"] .eyebrow {
    background: rgba(56, 189, 248, 0.08);
    border-color: rgba(56, 189, 248, 0.2);
}

.eyebrow::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-primary);
    box-shadow: 0 0 12px var(--accent-primary);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50%      { transform: scale(1.4); opacity: 0.6; }
}

.gradient-text {
    background: var(--grad-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.serif-italic {
    font-family: var(--font-display);
    font-style: italic;
    font-weight: 400;
}

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto var(--space-16);
}

.section-header .eyebrow { margin-bottom: var(--space-5); }
.section-header h2       { margin-bottom: var(--space-4); }
.section-header p        { color: var(--text-secondary); font-size: 1.125rem; }

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--t-normal) var(--ease-out);
    position: relative;
    overflow: hidden;
    text-decoration: none;
    white-space: nowrap;
    border: 1.5px solid transparent;
}

.btn-primary {
    background: var(--grad-sky);
    color: white;
    box-shadow: 0 4px 14px rgba(14, 165, 233, 0.35);
}

.btn-primary::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--grad-azure);
    opacity: 0;
    transition: opacity var(--t-normal) var(--ease-out);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(14, 165, 233, 0.45), 0 0 40px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover::before { opacity: 1; }

.btn-primary span { position: relative; z-index: 1; display: inline-flex; align-items: center; gap: var(--space-2); }

.btn-secondary {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border-color: var(--border-medium);
}

.btn-secondary:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-ghost {
    background: transparent;
    color: var(--text-primary);
    padding: var(--space-3) var(--space-5);
}

.btn-ghost:hover {
    color: var(--accent-primary);
    background: var(--sky-50);
}

[data-theme="dark"] .btn-ghost:hover {
    background: rgba(56, 189, 248, 0.08);
}

.btn-sm  { padding: var(--space-3) var(--space-5); font-size: 0.85rem; }
.btn-lg  { padding: var(--space-5) var(--space-10); font-size: 1.05rem; }

/* ===== UTILITY ===== */
.text-center { text-align: center; }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--sky-400), var(--sky-600));
    border-radius: var(--radius-full);
    border: 2px solid var(--bg-secondary);
}
::-webkit-scrollbar-thumb:hover { background: linear-gradient(180deg, var(--sky-500), var(--sky-700)); }

/* ===== SELECTION ===== */
::selection { background: var(--sky-300); color: var(--sky-950); }
[data-theme="dark"] ::selection { background: var(--sky-400); color: var(--ink-950); }

/* ===== NOISE TEXTURE ===== */
.noise-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: 0.04;
    z-index: 1;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' /%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' /%3E%3C/svg%3E");
    mix-blend-mode: overlay;
}

[data-theme="dark"] .noise-overlay { opacity: 0.06; mix-blend-mode: screen; }

/* ===== AOS ANIMATIONS (custom) ===== */
[data-reveal] {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 800ms var(--ease-out), transform 800ms var(--ease-out);
}

[data-reveal].revealed { opacity: 1; transform: translateY(0); }

[data-reveal="left"]  { transform: translateX(-40px); }
[data-reveal="right"] { transform: translateX(40px); }
[data-reveal="scale"] { transform: scale(0.9); }
[data-reveal].revealed { transform: translate(0, 0) scale(1); }

[data-reveal-delay="100"] { transition-delay: 100ms; }
[data-reveal-delay="200"] { transition-delay: 200ms; }
[data-reveal-delay="300"] { transition-delay: 300ms; }
[data-reveal-delay="400"] { transition-delay: 400ms; }
[data-reveal-delay="500"] { transition-delay: 500ms; }
[data-reveal-delay="600"] { transition-delay: 600ms; }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
    [data-reveal] { opacity: 1; transform: none; }
}