/**
 * Components
 * Reusable UI components with micro-interactions
 */

/* ═══════════════════════════════════════════
   BUTTONS
═══════════════════════════════════════════ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    line-height: 1;
    border-radius: var(--radius-md);
    transition: 
        background-color var(--transition-fast),
        color var(--transition-fast),
        transform var(--transition-fast),
        box-shadow var(--transition-fast);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.btn:hover::before {
    opacity: 1;
}

.btn:active {
    transform: scale(0.98);
}

.btn-icon {
    width: 1em;
    height: 1em;
    transition: transform var(--transition-normal);
}

.btn:hover .btn-icon {
    transform: translateX(3px);
}

/* Primary button */
.btn-primary {
    background: var(--gradient-accent);
    color: var(--color-text-primary);
    box-shadow: var(--shadow-glow-sm);
}

.btn-primary:hover {
    box-shadow: var(--shadow-glow-md);
}

/* Secondary button */
.btn-secondary {
    background: var(--color-bg-elevated);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border-default);
}

.btn-secondary:hover {
    background: var(--color-bg-surface);
    border-color: var(--color-border-strong);
}

/* Ghost button */
.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
}

.btn-ghost:hover {
    color: var(--color-text-primary);
    background: var(--color-bg-elevated);
}

/* Large button */
.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-base);
}

/* ═══════════════════════════════════════════
   BADGES & TAGS
═══════════════════════════════════════════ */

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    background: var(--gradient-accent-soft);
    border: 1px solid var(--color-border-accent);
    border-radius: var(--radius-full);
    color: var(--color-accent-tertiary);
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full);
    background: var(--color-accent-primary);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.9); }
}

.tag {
    display: inline-flex;
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-family: var(--font-mono);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    transition: 
        background-color var(--transition-fast),
        border-color var(--transition-fast);
}

.tag:hover {
    background: var(--color-bg-surface);
    border-color: var(--color-border-default);
}

/* ═══════════════════════════════════════════
   CARDS
═══════════════════════════════════════════ */

.card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    transition: 
        transform var(--transition-normal),
        border-color var(--transition-normal),
        box-shadow var(--transition-normal);
}

.card:hover {
    border-color: var(--color-border-default);
}

.card--interactive:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card--glow:hover {
    box-shadow: var(--shadow-glow-sm);
    border-color: var(--color-border-accent);
}

/* ═══════════════════════════════════════════
   SECTION COMPONENTS
═══════════════════════════════════════════ */

.section-label {
    display: inline-block;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    letter-spacing: var(--tracking-wider);
    text-transform: uppercase;
    color: var(--color-accent-primary);
    margin-bottom: var(--space-4);
}

.section-title {
    font-size: var(--text-4xl);
    font-weight: var(--font-semibold);
    line-height: var(--leading-tight);
    letter-spacing: var(--tracking-tight);
    margin-bottom: var(--space-6);
    text-wrap: balance;
}

.section-description {
    font-size: var(--text-lg);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
    max-width: 640px;
}

.section-header--centered {
    text-align: center;
}

.section-header--centered .section-description {
    margin-left: auto;
    margin-right: auto;
}

/* ═══════════════════════════════════════════
   BROWSER MOCKUP
═══════════════════════════════════════════ */

.project-browser {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-2xl);
}

.browser-header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-tertiary);
    border-bottom: 1px solid var(--color-border-subtle);
}

.browser-dots {
    display: flex;
    gap: var(--space-2);
}

.browser-dots span {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-full);
    background: var(--color-bg-elevated);
}

.browser-dots span:first-child { background: #ef4444; }
.browser-dots span:nth-child(2) { background: #f59e0b; }
.browser-dots span:nth-child(3) { background: #10b981; }

.browser-url {
    flex: 1;
    padding: var(--space-2) var(--space-4);
    background: var(--color-bg-primary);
    border-radius: var(--radius-md);
    font-size: var(--text-xs);
    font-family: var(--font-mono);
    color: var(--color-text-tertiary);
    text-align: center;
}

.browser-content {
    padding: var(--space-4);
    background: var(--color-bg-primary);
    min-height: 300px;
}

/* Mock Dashboard inside browser */
.mock-dashboard {
    display: flex;
    height: 280px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.mock-sidebar {
    width: 60px;
    background: var(--color-bg-tertiary);
    padding: var(--space-3);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.mock-logo {
    width: 36px;
    height: 36px;
    background: var(--gradient-accent);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
}

.mock-nav-item {
    width: 36px;
    height: 36px;
    background: var(--color-bg-elevated);
    border-radius: var(--radius-md);
    opacity: 0.5;
    transition: opacity var(--transition-fast);
}

.mock-nav-item.active {
    opacity: 1;
    background: var(--gradient-accent-soft);
    border: 1px solid var(--color-border-accent);
}

.mock-main {
    flex: 1;
    padding: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.mock-header-bar {
    height: 32px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
}

.mock-stats-row {
    display: flex;
    gap: var(--space-3);
}

.mock-stat-card {
    flex: 1;
    height: 60px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-subtle);
}

.mock-stat-card:first-child {
    background: var(--gradient-accent-soft);
    border-color: var(--color-border-accent);
}

.mock-table {
    flex: 1;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--space-3);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.mock-table-header {
    height: 24px;
    background: var(--color-bg-elevated);
    border-radius: var(--radius-sm);
    opacity: 0.7;
}

.mock-table-row {
    height: 32px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-sm);
}

/* Floating cards */
.project-floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    box-shadow: var(--shadow-lg);
    animation: float 6s ease-in-out infinite;
}

.project-floating-card svg {
    width: 18px;
    height: 18px;
    color: var(--color-accent-primary);
}

.card-sync {
    bottom: 20%;
    right: -5%;
    animation-delay: 0s;
}

.card-api {
    top: 10%;
    right: 5%;
    animation-delay: -3s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* ═══════════════════════════════════════════
   FORM ELEMENTS
═══════════════════════════════════════════ */

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-label {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-primary);
}

.form-optional {
    font-weight: var(--font-normal);
    color: var(--color-text-muted);
    font-size: var(--text-xs);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: var(--text-base);
    transition: 
        border-color var(--transition-fast),
        box-shadow var(--transition-fast);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-text-muted);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
    outline: none;
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

.form-hint {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

/* ═══════════════════════════════════════════
   DIVIDERS
═══════════════════════════════════════════ */

.divider {
    height: 1px;
    background: var(--color-border-subtle);
    border: none;
}

.divider--gradient {
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent 0%,
        var(--color-border-default) 50%,
        transparent 100%
    );
}

/* ═══════════════════════════════════════════
   BACK TO TOP BUTTON
═══════════════════════════════════════════ */

.back-to-top {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.9);
    transition: 
        opacity 0.4s var(--ease-expo-out),
        visibility 0.4s var(--ease-expo-out),
        transform 0.4s var(--ease-expo-out),
        background-color 0.2s var(--ease-smooth),
        border-color 0.2s var(--ease-smooth),
        color 0.2s var(--ease-smooth),
        box-shadow 0.2s var(--ease-smooth);
    z-index: var(--z-fixed);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.back-to-top:hover {
    background: var(--color-bg-surface);
    border-color: var(--color-border-accent);
    color: var(--color-accent-primary);
    box-shadow: var(--shadow-glow-md);
}

.back-to-top:active {
    transform: scale(0.92);
}

.back-to-top svg {
    width: 20px;
    height: 20px;
    transition: transform 0.3s var(--ease-expo-out);
}

.back-to-top:hover svg {
    transform: none;
}

/* Progress ring around button */
.back-to-top-progress {
    position: absolute;
    inset: -2px;
    border-radius: 50%;
}

.back-to-top-progress svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.back-to-top-progress circle {
    fill: none;
    stroke: var(--color-accent-primary);
    stroke-width: 2;
    stroke-linecap: round;
    opacity: 0.5;
    transition: stroke-dashoffset 0.1s linear;
}