/* ==========================================
   NIDBEST Voice AI — Premium Dark Green/Gold Theme
   Mobile-First, Fully Responsive
   ========================================== */
:root {
    --bg-dark: #0a1a14;
    --bg-card: #132e22;
    --gold: #d4a537;
    --gold-light: #e8c068;
    --gold-dark: #b8892e;
    --text-primary: #f0f0f0;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;
    --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
}

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

html { font-size: 16px; }

body {
    font-family: var(--font-main);
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

.site-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #2a4a3a;
    background: rgba(10, 26, 20, 0.95);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 10;
}

.brand {
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    color: var(--gold);
}

.hero-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1.5rem;
}

.hero-card {
    background: var(--bg-card);
    border: 1px solid #2a4a3a;
    border-radius: 16px;
    padding: 2rem;
    max-width: 600px;
    width: 100%;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

.hero-title {
    font-size: 1.8rem;
    line-height: 1.25;
    margin-bottom: 1rem;
    font-weight: 700;
}

.gold-text { color: var(--gold); }

.hero-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 2rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-family: var(--font-main);
    font-weight: 600;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--gold), var(--gold-dark));
    color: #0a1a14;
    box-shadow: 0 4px 16px rgba(212, 165, 55, 0.2);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--gold-light), var(--gold));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(212, 165, 55, 0.3);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    min-height: 52px; /* Touch-friendly */
    width: 100%;
}

.subtle-text {
    margin-top: 1.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    opacity: 0.8;
}

.site-footer {
    padding: 1.5rem;
    text-align: center;
    border-top: 1px solid #2a4a3a;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ==========================================
   Responsive Breakpoints
   ========================================== */
@media (min-width: 481px) {
    .hero-title { font-size: 2.2rem; }
    .hero-card { padding: 2.5rem; }
}

@media (min-width: 769px) {
    .hero-container { padding: 3rem; }
    .hero-title { font-size: 2.6rem; }
    .hero-subtitle { font-size: 1.1rem; }
    .btn-large { width: auto; padding: 1.1rem 3.5rem; }
}

/* Accessibility & Mobile Optimization */
@media (max-width: 480px) {
    .btn-primary { min-height: 56px; font-size: 1rem; }
    .hero-card { padding: 1.5rem; }
}

*:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { transition: none !important; animation: none !important; }
}