/* ARKBEL Global — shared brand frame
 * Single source of truth for tokens, base typography, header, nav,
 * language switcher, mobile menu, hero, container, and buttons.
 *
 * Loaded by every public-facing page so the global frame stays constant
 * across the main site, blog, and landing pages. Page-specific styles
 * layer on top of this stylesheet.
 */

/* ---------------------------------------------------------------- *
 * Tokens
 * ---------------------------------------------------------------- */
:root {
    --bg-primary: #0C0C0E;
    --bg-secondary: #141418;
    --bg-elevated: #1A1A1F;
    --bg-hover: #222228;

    --text-primary: #F5F5F3;
    --text-secondary: #A0A0A0;
    --text-muted: #6B6B6B;

    --accent: #D4A254;
    --accent-light: #E8C078;
    --accent-dark: #B8862E;
    --accent-glow: rgba(212, 162, 84, 0.15);

    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);

    --font-display: 'Syne', sans-serif;
    --font-body: 'Instrument Sans', sans-serif;

    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 10rem;

    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

/* ---------------------------------------------------------------- *
 * Reset + base
 * ---------------------------------------------------------------- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

::selection {
    background: var(--accent);
    color: var(--bg-primary);
}

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--bg-hover); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ---------------------------------------------------------------- *
 * Container (page wrapper)
 * ---------------------------------------------------------------- */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-xl);
    }
}

/* ---------------------------------------------------------------- *
 * Header
 * ---------------------------------------------------------------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    transition: background 0.3s ease, backdrop-filter 0.3s ease, border-color 0.3s ease;
}

.header.scrolled {
    background: rgba(12, 12, 14, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

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

/* ---------------------------------------------------------------- *
 * Logo lockup
 * ---------------------------------------------------------------- */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: var(--text-primary);
}

.logo-icon {
    height: 40px;
    width: auto;
    transition: transform 0.3s ease;
}

.logo:hover .logo-icon {
    transform: scale(1.05);
}

.logo-text-group {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.4rem;
    letter-spacing: 0.08em;
    color: var(--accent);
}

.logo-slogan {
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 0.65rem;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    text-transform: uppercase;
}

/* ---------------------------------------------------------------- *
 * Primary nav
 * ---------------------------------------------------------------- */
.nav {
    display: none;
}

@media (min-width: 1024px) {
    .nav {
        display: flex;
        align-items: center;
        gap: var(--space-lg);
    }
}

.nav a,
.nav button.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    font-family: var(--font-body);
    transition: color 0.2s ease;
    position: relative;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.nav a::after,
.nav button.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s var(--ease-out);
}

.nav a:hover,
.nav button.nav-link:hover {
    color: var(--text-primary);
}

.nav a:hover::after,
.nav button.nav-link:hover::after,
.nav a.active::after {
    width: 100%;
}

.nav a.active {
    color: var(--text-primary);
}

/* ---------------------------------------------------------------- *
 * Header actions (lang switch + mobile menu trigger)
 * ---------------------------------------------------------------- */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.lang-switch {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 4px;
    margin-left: var(--space-md);
}

.lang-btn {
    padding: 0.4rem 0.6rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border-radius: 5px;
    transition: all 0.2s ease;
}

.lang-btn:hover { color: var(--text-primary); }
.lang-btn.active { background: var(--accent); color: var(--bg-primary); }

/* ---------------------------------------------------------------- *
 * Mobile menu (slide-from-right drawer)
 * ---------------------------------------------------------------- */
.mobile-menu-btn {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

@media (min-width: 1024px) {
    .mobile-menu-btn { display: none; }
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

.mobile-menu {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: 999;
    display: flex;
    flex-direction: column;
    padding: var(--space-3xl) var(--space-md);
    transform: translateX(100%);
    transition: transform 0.4s var(--ease-out);
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 2rem;
    cursor: pointer;
    padding: var(--space-xs);
}

.mobile-menu nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.mobile-menu nav a,
.mobile-menu nav button.mobile-nav-link {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s ease;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    text-align: left;
}

.mobile-menu nav a:hover,
.mobile-menu nav button.mobile-nav-link:hover {
    color: var(--accent);
}

.mobile-lang-switch {
    margin-top: auto;
    display: flex;
    gap: var(--space-sm);
}

/* ---------------------------------------------------------------- *
 * Hero
 * ---------------------------------------------------------------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-3xl) 0 var(--space-2xl);
    z-index: 1;
}

.hero-content {
    max-width: 900px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.5rem 1rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s var(--ease-out) 0.2s forwards;
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2s ease infinite;
}

.hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-lg);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s var(--ease-out) 0.4s forwards;
}

.hero h1 .accent { color: var(--accent); }

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: var(--space-xl);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s var(--ease-out) 0.6s forwards;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s var(--ease-out) 0.8s forwards;
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
        margin-bottom: var(--space-xl);
    }

    .hero-actions .btn {
        text-align: center;
        justify-content: center;
    }
}

/* ---------------------------------------------------------------- *
 * Buttons
 * ---------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.75rem 1.5rem;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all 0.3s var(--ease-out);
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-primary);
}

.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 40px -10px var(--accent);
}

.btn-ghost {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* ---------------------------------------------------------------- *
 * Shared animations
 * ---------------------------------------------------------------- */
@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ---------------------------------------------------------------- *
 * Accessibility
 * ---------------------------------------------------------------- */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}