/* ═══════════════════════════════════════════
   CORE UI UTILITIES (.card, .btn, .glass, .reveal)
   Shared Across All Pages
   ═══════════════════════════════════════════ */

/* --- LAYOUT UTILITIES --- */
.container {
    width: min(92%, var(--container, 1200px));
    margin-inline: auto;
    padding-inline: var(--space-4, 1rem);
}

.flex {
    display: flex;
}

.flex--center {
    justify-content: center;
    align-items: center;
}

.grid {
    display: grid;
    gap: var(--space-4, 1rem);
}

.grid--2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

/* --- GLASSMORPHISM --- */
.glass {
    background: var(--color-bg-glass, rgba(255, 250, 242, 0.88));
    border: 1px solid var(--color-border, rgba(29, 36, 48, 0.1));
    border-radius: var(--radius-lg, 24px);
    box-shadow: var(--shadow-sm, 0 20px 50px rgba(52, 57, 68, 0.08));
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.glass--hover {
    transition:
        transform var(--duration-normal) var(--ease-out),
        border-color var(--duration-normal) var(--ease-out),
        box-shadow var(--duration-normal) var(--ease-out),
        background-color var(--duration-normal) ease;
}

.glass--hover:hover,
.glass--hover:focus-visible {
    transform: translateY(-2px);
    border-color: var(--color-border-strong, rgba(29, 36, 48, 0.16));
    box-shadow: var(--shadow-md, 0 18px 42px rgba(52, 57, 68, 0.12));
}

/* --- CARDS --- */
.card {
    position: relative;
    overflow: hidden;
    padding: clamp(1.35rem, 1.1rem + 0.8vw, 1.9rem);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg-elevated);
    box-shadow: var(--shadow-md);
}

.card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.22), transparent 44%);
    pointer-events: none;
}

.card--interactive {
    transition:
        transform var(--duration-normal) var(--ease-out),
        box-shadow var(--duration-normal) var(--ease-out),
        border-color var(--duration-normal) var(--ease-out),
        background-color var(--duration-normal) ease;
}

.card--interactive:hover,
.card--interactive:focus-visible {
    transform: translateY(-4px);
    border-color: var(--color-border-strong);
    box-shadow: var(--shadow-lg);
}

/* --- BUTTONS --- */
.btn,
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 50px;
    padding: 0 22px;
    border: 1px solid transparent;
    border-radius: var(--radius-full, 9999px);
    font-weight: 700;
    background: var(--color-text, #1d2430);
    color: var(--color-surface, #fffaf2);
    transition:
        transform var(--duration-fast) ease,
        background-color var(--duration-fast) ease,
        border-color var(--duration-fast) ease,
        color var(--duration-fast) ease;
    cursor: pointer;
    text-decoration: none;
}

.btn:hover,
.btn:focus-visible,
.button:hover,
.button:focus-visible {
    transform: translateY(-2px);
}

.btn--primary {
    background: var(--color-text);
    color: var(--color-surface);
}

.btn--ghost,
.btn--outline,
.button--ghost {
    background: transparent;
    border: 1px solid var(--color-border-strong);
    color: var(--color-text);
}

.btn--ghost:hover,
.btn--outline:hover,
.button--ghost:hover {
    background: rgba(255, 255, 255, 0.08);
}

[data-theme="light"] .btn--ghost:hover,
[data-theme="light"] .btn--outline:hover {
    background: rgba(29, 36, 48, 0.04);
}

.btn--glow::before,
.btn::after {
    display: none;
}

/* --- REVEAL ANIMATIONS --- */
.reveal {
    opacity: 0;
    transform: translateY(22px);
    transition:
        opacity 600ms var(--ease-out),
        transform 600ms var(--ease-out);
}

.reveal--left {
    transform: translateX(-26px);
}

.reveal--right {
    transform: translateX(26px);
}

.reveal.is-visible,
.reveal.active {
    opacity: 1;
    transform: none;
}

.reveal-delay-1 {
    transition-delay: 70ms;
}

.reveal-delay-2 {
    transition-delay: 140ms;
}

@media (prefers-reduced-motion: reduce) {

    .reveal,
    .card--interactive,
    .glass--hover,
    .btn,
    .button {
        transition: none !important;
        transform: none !important;
        opacity: 1 !important;
    }
}