/*!
 * BUSYTAP Premium Glass — Landing page design tokens
 *
 * Augments `landing-redesign.css` with the canonical glass system so every
 * section (hero, navbar, feature cards, footer, etc.) reads as one product.
 *
 * Subtle by design: 1px hairline borders + 8-12px radius + soft 2-layer shadow.
 * Backdrop-filter blur is reserved for navigation overlays only.
 *
 * Version: 1.0 — 2026-09-30
 */

:root {
    /* Brand */
    --glass-primary: #0A2540;
    --glass-primary-soft: #173A66;
    --glass-accent: #FF7A59;
    --glass-accent-soft: #FFB199;

    /* Surfaces (light) */
    --glass-surface: #F7F8FB;
    --glass-surface-elevated: #FFFFFF;
    --glass-fill: rgba(255, 255, 255, 0.78);
    --glass-fill-soft: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(10, 37, 64, 0.08);
    --glass-border-strong: rgba(10, 37, 64, 0.14);

    /* Text */
    --glass-text-primary: #0A2540;
    --glass-text-secondary: #4F5B6B;
    --glass-text-muted: #8A93A4;

    /* States */
    --glass-success: #16A34A;
    --glass-warning: #F59E0B;
    --glass-danger: #DC2626;
    --glass-info: #0EA5E9;

    /* Shadows (2-layer ambient + direct) */
    --glass-shadow-sm: 0 2px 6px rgba(10, 37, 64, 0.04), 0 1px 2px rgba(10, 37, 64, 0.08);
    --glass-shadow-md: 0 8px 24px rgba(10, 37, 64, 0.06), 0 2px 6px rgba(10, 37, 64, 0.08);
    --glass-shadow-lg: 0 16px 40px rgba(10, 37, 64, 0.08), 0 4px 12px rgba(10, 37, 64, 0.1);

    /* Radius */
    --glass-radius-input: 12px;
    --glass-radius-button: 10px;
    --glass-radius-card: 16px;
    --glass-radius-modal: 22px;

    /* Motion */
    --glass-ease: cubic-bezier(0.16, 1, 0.3, 1);
    --glass-dur-fast: 150ms;
    --glass-dur-normal: 220ms;
    --glass-dur-slow: 320ms;
}

/* Glass surface — applies the canonical layered look to .glass-card */
.glass-surface {
    background: var(--glass-fill);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--glass-radius-card);
    box-shadow: var(--glass-shadow-md);
    transition: transform var(--glass-dur-normal) var(--glass-ease),
                box-shadow var(--glass-dur-normal) var(--glass-ease);
}
.glass-surface:hover {
    box-shadow: var(--glass-shadow-lg);
    transform: translateY(-2px);
}

/* Tinted glass — accent variant for promotional surfaces */
.glass-surface--accent {
    background: linear-gradient(135deg,
                                rgba(255, 122, 89, 0.10),
                                rgba(255, 177, 153, 0.05));
    border-color: rgba(255, 122, 89, 0.20);
}
.glass-surface--primary {
    background: linear-gradient(135deg,
                                rgba(10, 37, 64, 0.95),
                                rgba(23, 58, 102, 0.92));
    color: #FFFFFF;
    border-color: rgba(255, 255, 255, 0.10);
}
.glass-surface--primary h1,
.glass-surface--primary h2,
.glass-surface--primary h3,
.glass-surface--primary p {
    color: #FFFFFF;
}

/* Glass button — outlined variant */
.glass-btn {
    background: var(--glass-fill);
    border: 1px solid var(--glass-border-strong);
    border-radius: var(--glass-radius-button);
    padding: 10px 18px;
    color: var(--glass-text-primary);
    font-weight: 600;
    transition: all var(--glass-dur-fast) var(--glass-ease);
}
.glass-btn:hover {
    background: var(--glass-surface-elevated);
    border-color: var(--glass-primary);
    color: var(--glass-primary);
    box-shadow: var(--glass-shadow-sm);
}
.glass-btn:active {
    transform: scale(0.98);
}

/* Glass input — matches the Flutter inputDecorationTheme */
.glass-input {
    background: #F4F6FA;
    border: 1px solid #E4E8F0;
    border-radius: var(--glass-radius-input);
    padding: 12px 16px;
    color: var(--glass-text-primary);
    transition: border-color var(--glass-dur-fast) var(--glass-ease),
                box-shadow var(--glass-dur-fast) var(--glass-ease);
    width: 100%;
    font: inherit;
}
.glass-input:focus {
    outline: none;
    border-color: var(--glass-primary);
    box-shadow: 0 0 0 3px rgba(10, 37, 64, 0.10);
}

/* Glass badge — small pill */
.glass-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--glass-fill);
    border: 1px solid var(--glass-border);
    font-size: 12px;
    font-weight: 600;
    color: var(--glass-text-secondary);
}
.glass-badge--accent {
    background: rgba(255, 122, 89, 0.10);
    border-color: rgba(255, 122, 89, 0.25);
    color: var(--glass-accent);
}
.glass-badge--primary {
    background: rgba(10, 37, 64, 0.08);
    border-color: rgba(10, 37, 64, 0.18);
    color: var(--glass-primary);
}

/* Glass navbar — used at the top of every landing section */
.glass-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--glass-fill-soft);
    -webkit-backdrop-filter: blur(20px) saturate(140%);
    backdrop-filter: blur(20px) saturate(140%);
    border-bottom: 1px solid var(--glass-border);
}

/* Hero — large title + subtitle + dual CTA */
.glass-hero-title {
    font-weight: 800;
    font-size: clamp(2.5rem, 5vw, 3.75rem);
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--glass-text-primary);
    margin: 0 0 16px;
}
.glass-hero-subtitle {
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    line-height: 1.6;
    color: var(--glass-text-secondary);
    margin: 0 0 24px;
    max-width: 56ch;
}
.glass-hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-top: 8px;
}

/* Section heading */
.glass-section-heading {
    font-weight: 700;
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    line-height: 1.2;
    letter-spacing: -0.01em;
    color: var(--glass-text-primary);
    margin: 0 0 8px;
}
.glass-section-subheading {
    font-size: 1rem;
    color: var(--glass-text-secondary);
    margin: 0 0 32px;
    max-width: 60ch;
}

/* Dialog / modal */
.glass-dialog {
    background: var(--glass-surface-elevated);
    border-radius: var(--glass-radius-modal);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow-lg);
    padding: 28px;
}

/* Alert variants */
.glass-alert {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--glass-radius-card);
    background: var(--glass-fill);
    border: 1px solid var(--glass-border);
    color: var(--glass-text-primary);
}
.glass-alert--success { border-left: 3px solid var(--glass-success); }
.glass-alert--warning { border-left: 3px solid var(--glass-warning); }
.glass-alert--danger  { border-left: 3px solid var(--glass-danger); }
.glass-alert--info    { border-left: 3px solid var(--glass-info); }

/* Tabs */
.glass-tab {
    padding: 10px 16px;
    border-radius: var(--glass-radius-button);
    color: var(--glass-text-secondary);
    font-weight: 500;
    transition: all var(--glass-dur-fast) var(--glass-ease);
    cursor: pointer;
}
.glass-tab:hover {
    background: var(--glass-fill);
    color: var(--glass-text-primary);
}
.glass-tab--active {
    background: var(--glass-primary);
    color: #FFFFFF;
}

/* Skeleton / loading */
.glass-skeleton {
    background: linear-gradient(90deg,
                                rgba(10, 37, 64, 0.05),
                                rgba(10, 37, 64, 0.10),
                                rgba(10, 37, 64, 0.05));
    background-size: 200% 100%;
    border-radius: var(--glass-radius-button);
    animation: glass-shimmer 1.6s linear infinite;
}
@keyframes glass-shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Empty state */
.glass-empty {
    text-align: center;
    padding: 56px 24px;
    color: var(--glass-text-muted);
}
.glass-empty-icon {
    font-size: 48px;
    color: var(--glass-text-muted);
    margin-bottom: 12px;
}

/* Error state — same shape, accent border */
.glass-error {
    border-left: 3px solid var(--glass-danger);
    background: rgba(220, 38, 38, 0.04);
}

/* Responsive — stack glass-nav padding on mobile */
@media (max-width: 768px) {
    .glass-hero-title { font-size: 2rem; }
    .glass-section-heading { font-size: 1.375rem; }
    .glass-surface { border-radius: 14px; }
}

/* Reduced motion — disable blur + animation when user prefers it */
@media (prefers-reduced-motion: reduce) {
    .glass-surface,
    .glass-btn,
    .glass-tab,
    .glass-skeleton,
    .glass-input {
        transition: none;
        animation: none;
        -webkit-backdrop-filter: none;
        backdrop-filter: none;
    }
}

/* Focus state — accessibility */
.glass-btn:focus-visible,
.glass-input:focus-visible,
.glass-tab:focus-visible {
    outline: 2px solid var(--glass-primary);
    outline-offset: 2px;
}