/* ========================================
   Reset & Base
   ======================================== */

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

:root {
    /* Colors */
    --color-bg: #f3eee6;
    --color-panel: #fbf8f2;
    --color-text: #171717;
    --color-text-muted: #6f685f;
    --color-accent: #2410a3;
    --color-accent-tint: rgba(36, 16, 163, 0.08);
    --color-border: #e3dbcf;

    /* Typography - English */
    --font-serif: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
    --font-sans: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Typography - Khmer */
    --font-khmer-display: 'Kantumruy Pro', 'Battambang', 'Noto Serif Khmer', serif;
    --font-khmer-ui: 'Battambang', 'Noto Sans Khmer', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;

    /* Transitions */
    --transition-subtle: 0.25s ease-out;
}

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

body {
    font-family: var(--font-sans);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    min-height: 100vh;
}

/* Language-specific font stacks */
/* Khmer language content uses Khmer fonts */
html[lang="km"] body {
    font-family: var(--font-khmer-ui);
}

html[lang="km"] .hero-title,
html[lang="km"] .hero-tagline,
html[lang="km"] .about-heading {
    font-family: var(--font-khmer-display);
}

/* ========================================
   Page Layout
   ======================================== */

.page-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--spacing-xl);
}

/* ========================================
   Hero Panel
   ======================================== */

.hero-panel {
    width: min(920px, 88vw);
    min-height: 620px;
    background: var(--color-panel);
    border: 1px solid var(--color-border);
    border-radius: 18px;
    padding: var(--spacing-2xl) var(--spacing-xl);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(0, 0, 0, 0.03);
    opacity: 0;
    animation: fadeIn 0.6s ease-out forwards;
}

/* Top Row */
.panel-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.panel-location,
.panel-status {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

/* Khmer language overrides for top row */
html[lang="km"] .panel-location {
    font-family: var(--font-khmer-ui);
    text-transform: none;
    letter-spacing: 0;
}

/* ========================================
   Language Switcher Tabs
   ======================================== */

.lang-switcher {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px;
    background: rgba(0, 0, 0, 0.03);
    border-radius: 8px;
}

.lang-tab {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 48px;
    padding: 8px 14px;
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--color-text-muted);
    text-decoration: none;
    border-radius: 6px;
    transition: all var(--transition-subtle);
    cursor: pointer;
}

html[lang="km"] .lang-tab {
    font-family: var(--font-khmer-ui);
    min-width: 60px;
    font-size: 0.875rem;
}

.lang-tab:hover {
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.6);
}

.lang-tab--active {
    color: var(--color-accent);
    background: var(--color-panel);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.lang-tab:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: 4px;
}

/* Keyboard navigation skip hint */
.lang-switcher::before {
    content: '';
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Center Block */
.panel-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.hero-logo {
    max-width: 280px;
    width: auto;
    height: auto;
    object-fit: contain;
    margin-bottom: var(--spacing-lg);
}

.hero-title {
    font-family: var(--font-serif);
    font-size: 2.75rem;
    font-weight: 500;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.hero-tagline {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-weight: 400;
    line-height: 1.4;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.hero-subtitle {
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--color-text-muted);
}

/* Bottom Row */
.panel-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-email {
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-subtle), color var(--transition-subtle);
}

.panel-email:hover {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
}

.panel-email:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
    border-radius: 3px;
}

.panel-year {
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--color-text-muted);
}

html[lang="km"] .panel-year {
    font-family: var(--font-khmer-ui);
}

/* ========================================
   About Section
   ======================================== */

.about-section {
    width: 100%;
    max-width: 680px;
    margin-top: var(--spacing-2xl);
    text-align: center;
    opacity: 0;
    animation: fadeIn 0.6s ease-out 0.2s forwards;
}

.about-heading {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 500;
    letter-spacing: -0.01em;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.about-text {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

html[lang="km"] .about-text {
    font-family: var(--font-khmer-ui);
    line-height: 1.8;
}

.about-text:last-child {
    margin-bottom: 0;
}

/* ========================================
   Animations
   ======================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
    .page-wrapper {
        padding: var(--spacing-lg);
    }

    .hero-panel {
        padding: var(--spacing-xl) var(--spacing-lg);
        min-height: 540px;
    }

    .hero-logo {
        max-width: 220px;
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-tagline {
        font-size: 1.2rem;
    }

    .about-heading {
        font-size: 1.5rem;
    }

    .about-text {
        font-size: 0.9375rem;
    }
}

@media (max-width: 480px) {
    .page-wrapper {
        padding: var(--spacing-md);
    }

    .hero-panel {
        padding: var(--spacing-lg) var(--spacing-md);
        border-radius: 14px;
        min-height: 480px;
    }

    .panel-top {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }

    .panel-location,
    .panel-status {
        font-size: 0.6875rem;
    }

    .lang-switcher {
        order: -1;
        width: 100%;
        justify-content: center;
    }

    .lang-tab {
        min-width: 44px;
        padding: 6px 12px;
        font-size: 0.75rem;
    }

    html[lang="km"] .lang-tab {
        min-width: 52px;
        font-size: 0.8125rem;
    }

    .panel-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }

    .panel-email,
    .panel-year {
        font-size: 0.8125rem;
    }

    .hero-logo {
        max-width: 180px;
        margin-bottom: var(--spacing-md);
    }

    .hero-title {
        font-size: 1.875rem;
    }

    .hero-tagline {
        font-size: 1.05rem;
    }

    .hero-subtitle {
        font-size: 0.875rem;
    }

    .about-section {
        margin-top: var(--spacing-xl);
    }

    .about-heading {
        font-size: 1.35rem;
    }

    .about-text {
        font-size: 0.875rem;
    }
}

/* ========================================
   Accessibility
   ======================================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible enhancement for better keyboard navigation */
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}