/* ============================================================
   PDF Editor — Components (components.css)
   Cards, buttons, badges, modals, theme picker, upload zone
   ============================================================ */

/* ── Tool Card ───────────────────────────────────────────── */
.tool-card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: var(--space-6);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    cursor: pointer;
    overflow: hidden;
    transition: all var(--duration-normal) var(--ease-out-expo);
    text-decoration: none;
    color: inherit;
    backdrop-filter: blur(12px) saturate(130%);
    -webkit-backdrop-filter: blur(12px) saturate(130%);
}

/* Animated gradient border on hover */
.tool-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-xl);
    padding: 1px;
    background: conic-gradient(
        from var(--gradient-angle, 0deg),
        transparent 0%,
        var(--card-accent, var(--accent-primary)) 15%,
        transparent 30%,
        transparent 100%
    );
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease-out-expo);
    animation: rotate-gradient 4s linear infinite;
}

.tool-card:hover {
    transform: translateY(-4px) scale(1.01);
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    box-shadow:
        0 8px 32px rgba(0, 0, 0, 0.12),
        0 0 0 1px var(--glass-border-hover),
        0 0 40px -10px var(--card-accent, var(--accent-glow));
}

.tool-card:hover::before {
    opacity: 1;
}

.tool-card:active {
    transform: translateY(-2px) scale(0.99);
}

@keyframes rotate-gradient {
    to { --gradient-angle: 360deg; }
}

.tool-card__icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-4);
    font-size: 1.4rem;
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.tool-card:hover .tool-card__icon {
    transform: scale(1.08);
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

.tool-card__title {
    font-size: var(--text-base);
    font-weight: var(--weight-semibold);
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.tool-card__desc {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    line-height: var(--leading-relaxed);
    flex: 1;
}

.tool-card__arrow {
    position: absolute;
    top: var(--space-5);
    right: var(--space-5);
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: translateX(-8px);
    transition: all var(--duration-normal) var(--ease-out-expo);
    color: var(--text-tertiary);
}

.tool-card:hover .tool-card__arrow {
    opacity: 1;
    transform: translateX(0);
}

/* Category-specific accent colors */
.tool-card[data-category="organize"] { --card-accent: var(--cat-organize); }
.tool-card[data-category="organize"] .tool-card__icon { background: var(--cat-organize-bg); color: var(--cat-organize); }
.tool-card[data-category="convert"] { --card-accent: var(--cat-convert); }
.tool-card[data-category="convert"] .tool-card__icon { background: var(--cat-convert-bg); color: var(--cat-convert); }
.tool-card[data-category="edit"] { --card-accent: var(--cat-edit); }
.tool-card[data-category="edit"] .tool-card__icon { background: var(--cat-edit-bg); color: var(--cat-edit); }
.tool-card[data-category="optimize"] { --card-accent: var(--cat-optimize); }
.tool-card[data-category="optimize"] .tool-card__icon { background: var(--cat-optimize-bg); color: var(--cat-optimize); }
.tool-card[data-category="security"] { --card-accent: var(--cat-security); }
.tool-card[data-category="security"] .tool-card__icon { background: var(--cat-security-bg); color: var(--cat-security); }
.tool-card[data-category="scan"] { --card-accent: var(--cat-scan); }
.tool-card[data-category="scan"] .tool-card__icon { background: var(--cat-scan-bg); color: var(--cat-scan); }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-lg);
    font-family: var(--font-primary);
    font-size: var(--text-sm);
    font-weight: var(--weight-semibold);
    cursor: pointer;
    border: none;
    transition: all var(--duration-normal) var(--ease-out-expo);
    position: relative;
    overflow: hidden;
    user-select: none;
    text-decoration: none;
}

/* Ripple effect */
.btn::after {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.5s, height 0.5s;
}
.btn:active::after {
    width: 300px;
    height: 300px;
}

.btn--primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 16px var(--accent-glow);
}
.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--accent-glow);
}

.btn--secondary {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(8px);
}
.btn--secondary:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    transform: translateY(-1px);
}

.btn--ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: var(--space-2) var(--space-3);
}
.btn--ghost:hover {
    background: var(--glass-bg);
    color: var(--text-primary);
}

.btn--icon {
    padding: var(--space-2);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    backdrop-filter: blur(8px);
}
.btn--icon:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    color: var(--text-primary);
}

.btn--large {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-base);
    border-radius: var(--radius-xl);
}

/* ── Badge ───────────────────────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: var(--weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge--success { background: var(--success-bg); color: var(--success); }
.badge--warning { background: var(--warning-bg); color: var(--warning); }
.badge--danger { background: var(--danger-bg); color: var(--danger); }
.badge--info { background: var(--info-bg); color: var(--info); }
.badge--accent { background: var(--accent-soft); color: var(--accent-primary); }

/* ── Theme Picker ────────────────────────────────────────── */
.theme-picker-toggle {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-lg);
    transition: all var(--duration-normal) var(--ease-out-expo);
    backdrop-filter: blur(8px);
    position: relative;
}
.theme-picker-toggle:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    color: var(--text-primary);
    transform: rotate(30deg);
}

.theme-picker {
    position: fixed;
    top: 0;
    right: -360px;
    width: 340px;
    height: 100vh;
    z-index: var(--z-modal);
    background: var(--bg-secondary);
    border-left: 1px solid var(--glass-border);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    padding: var(--space-6);
    transition: right var(--duration-slow) var(--ease-out-expo);
    overflow-y: auto;
    box-shadow: -8px 0 40px rgba(0, 0, 0, 0.2);
}

.theme-picker.open {
    right: 0;
}

.theme-picker__overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: calc(var(--z-modal) - 1);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--duration-normal);
    backdrop-filter: blur(2px);
}

.theme-picker__overlay.open {
    opacity: 1;
    pointer-events: all;
}

.theme-picker__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
}

.theme-picker__title {
    font-size: var(--text-lg);
    font-weight: var(--weight-semibold);
}

.theme-picker__close {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-lg);
    transition: all var(--duration-fast);
}
.theme-picker__close:hover {
    background: var(--danger-bg);
    color: var(--danger);
}

.theme-picker__section-label {
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-tertiary);
    margin: var(--space-6) 0 var(--space-3);
}

.theme-picker__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
}

.theme-swatch {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    cursor: pointer;
    background: var(--glass-bg);
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.theme-swatch:hover {
    background: var(--glass-bg-hover);
    transform: translateY(-1px);
}

.theme-swatch.active {
    border-color: var(--accent-primary);
    box-shadow: 0 0 16px var(--accent-glow);
}

.theme-swatch__color {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
}

.theme-swatch__name {
    font-size: var(--text-xs);
    font-weight: var(--weight-medium);
    color: var(--text-primary);
    line-height: var(--leading-snug);
}

/* ── Toast / Notification ────────────────────────────────── */
.toast {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    padding: var(--space-4) var(--space-6);
    background: var(--bg-elevated);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    color: var(--text-primary);
    font-size: var(--text-sm);
    z-index: var(--z-toast);
    backdrop-filter: blur(var(--glass-blur));
    box-shadow: var(--shadow-xl);
    transform: translateY(100px);
    opacity: 0;
    transition: all var(--duration-slow) var(--ease-spring);
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

/* ── Progress Bar ────────────────────────────────────────── */
.progress {
    width: 100%;
    height: 6px;
    background: var(--glass-bg);
    border-radius: var(--radius-full);
    overflow: hidden;
    position: relative;
}

.progress__bar {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
    transition: width var(--duration-normal) var(--ease-out-expo);
    position: relative;
}

.progress__bar::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 40px;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3));
    animation: progress-shimmer 1.5s ease-in-out infinite;
}

@keyframes progress-shimmer {
    0% { opacity: 0; transform: translateX(-100%); }
    50% { opacity: 1; }
    100% { opacity: 0; transform: translateX(100%); }
}

/* ── Modal ───────────────────────────────────────────────── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--duration-normal);
    backdrop-filter: blur(4px);
}

.modal-overlay.open {
    opacity: 1;
    pointer-events: all;
}

.modal {
    background: var(--bg-elevated);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    max-width: 500px;
    width: 90%;
    transform: scale(0.9) translateY(20px);
    transition: transform var(--duration-slow) var(--ease-spring);
    box-shadow: var(--shadow-2xl);
}

.modal-overlay.open .modal {
    transform: scale(1) translateY(0);
}

/* ── Skeleton Loading ────────────────────────────────────── */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--glass-bg) 25%,
        var(--glass-bg-hover) 50%,
        var(--glass-bg) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

@keyframes skeleton-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}