/**
 * Первый Вагон — Components
 * Базовые UI компоненты в стиле Linear.app
 */

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    line-height: 1;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    border: 1px solid transparent;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Primary Button - Monochrome White */
.btn-primary {
    background-color: var(--brand-primary);
    color: #000000 !important;
    /* FORCE BLACK TEXT to fix visibility bug */
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow:
        0 1px 2px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.5);
    /* Stronger highlight */
    transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.2s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.2s ease;
    /* Removed 'all' transition to prevents potential color glitches during load */
    font-weight: 600;
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--brand-primary-hover);
    box-shadow:
        0 4px 12px rgba(0, 0, 0, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.6),
        0 0 20px rgba(255, 255, 255, 0.15);
    /* White Glow */
    transform: translateY(-2px);
    color: #000000 !important;
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
    background-color: var(--brand-secondary);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* Secondary Button - Subtle Outline */
.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-default);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-secondary:hover:not(:disabled) {
    background-color: rgba(255, 255, 255, 0.08);
    border-color: var(--text-secondary);
    color: #FFF;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* Ghost Button - Transparent */
.btn-ghost {
    background-color: transparent;
    color: var(--text-secondary);
    border: 1px solid transparent;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-ghost:hover:not(:disabled) {
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
    transform: translateY(-2px);
}

/* Brand Button - Gradient with Glow */
.btn-brand {
    background: var(--brand-gradient);
    color: var(--text-on-brand);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--glow-primary);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-brand:hover:not(:disabled) {
    box-shadow: var(--glow-primary-intense);
    transform: translateY(-2px);
    filter: brightness(1.1);
}

/* Button Sizes */
.btn-sm {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--text-xs);
}

.btn-lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--text-base);
    border-radius: var(--radius-lg);
}

.btn-xl {
    padding: var(--spacing-5) var(--spacing-10);
    font-size: var(--text-lg);
    border-radius: var(--radius-lg);
}

/* Button with icon */
.btn-icon {
    padding: var(--spacing-3);
}

.btn-icon.btn-sm {
    padding: var(--spacing-2);
}

/* ========================================
   CARDS
   ======================================== */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    transition: all var(--transition-base);
}

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

.card-elevated {
    box-shadow: var(--shadow-card);
}

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

.card-header {
    margin-bottom: var(--spacing-4);
}

.card-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
}

.card-description {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-top: var(--spacing-1);
}

.card-content {
    color: var(--text-secondary);
}

.card-footer {
    margin-top: var(--spacing-4);
    padding-top: var(--spacing-4);
    border-top: 1px solid var(--border-subtle);
}

/* Feature card (Linear style) */
.feature-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-8);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at top, rgba(99, 102, 241, 0.05), transparent 70%);
    pointer-events: none;
}

.feature-card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-4);
    color: var(--brand-primary);
}

.feature-card-title {
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
    margin-bottom: var(--spacing-2);
}

.feature-card-text {
    color: var(--text-secondary);
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
}

/* ========================================
   INPUTS
   ======================================== */
.input-wrapper {
    position: relative;
    width: 100%;
}

.input-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2);
}

.input {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    background-color: var(--bg-input);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--text-sm);
    transition: all var(--transition-base);
}

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

.input:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.input-error {
    border-color: var(--error);
}

.input-error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.input-hint {
    font-size: var(--text-xs);
    color: var(--text-muted);
    margin-top: var(--spacing-1);
}

.input-error-message {
    font-size: var(--text-xs);
    color: var(--error);
    margin-top: var(--spacing-1);
}

/* Textarea */
.textarea {
    min-height: 120px;
    resize: vertical;
}

/* Select */
.select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23A1A1AA' viewBox='0 0 16 16'%3E%3Cpath d='M8 10.5l-4-4h8l-4 4z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-3) center;
    padding-right: var(--spacing-10);
}

/* ========================================
   BADGES
   ======================================== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.badge-default {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
}

.badge-primary {
    background-color: rgba(99, 102, 241, 0.15);
    color: var(--brand-primary);
}

.badge-success {
    background-color: var(--status-open-bg);
    color: var(--status-open);
}

.badge-warning {
    background-color: var(--status-radar-bg);
    color: var(--status-radar);
}

.badge-error {
    background-color: var(--status-closed-bg);
    color: var(--status-closed);
}

/* Status badges for trends */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    border-radius: var(--radius-md);
}

.status-badge-open {
    background-color: var(--status-open-bg);
    color: var(--status-open);
}

.status-badge-radar {
    background-color: var(--status-radar-bg);
    color: var(--status-radar);
}

.status-badge-closed {
    background-color: var(--status-closed-bg);
    color: var(--status-closed);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: currentColor;
}

/* ========================================
   LINKS
   ======================================== */
.link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-base);
}

.link:hover {
    color: var(--text-primary);
}

.link-brand {
    color: var(--brand-primary);
}

.link-brand:hover {
    color: var(--brand-primary-hover);
}

.link-underline {
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* ========================================
   DIVIDERS
   ======================================== */
.divider {
    width: 100%;
    height: 1px;
    background-color: var(--border-subtle);
    margin: var(--spacing-6) 0;
}

.divider-vertical {
    width: 1px;
    height: 100%;
    background-color: var(--border-subtle);
    margin: 0 var(--spacing-4);
}

/* ========================================
   AVATARS
   ======================================== */
.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-medium);
    color: var(--text-secondary);
    overflow: hidden;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-sm {
    width: 32px;
    height: 32px;
    font-size: var(--text-sm);
}

.avatar-lg {
    width: 56px;
    height: 56px;
    font-size: var(--text-xl);
}

.avatar-xl {
    width: 80px;
    height: 80px;
    font-size: var(--text-3xl);
}

/* ========================================
   TAGS (Module tags)
   ======================================== */
.tag {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-1) var(--spacing-2);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    border-radius: var(--radius-sm);
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tag-tovarка {
    background-color: rgba(59, 130, 246, 0.15);
    color: #3B82F6;
}

.tag-content {
    background-color: rgba(139, 92, 246, 0.15);
    color: #8B5CF6;
}

.tag-arbitrage {
    background-color: rgba(34, 197, 94, 0.15);
    color: #22C55E;
}

.tag-services {
    background-color: rgba(249, 115, 22, 0.15);
    color: #F97316;
}

.tag-offline {
    background-color: rgba(236, 72, 153, 0.15);
    color: #EC4899;
}

/* ========================================
   PROGRESS BAR
   ======================================== */
.progress {
    width: 100%;
    height: 8px;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--brand-gradient);
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

.progress-sm {
    height: 4px;
}

.progress-lg {
    height: 12px;
}

/* ========================================
   TOOLTIPS
   ======================================== */
.tooltip {
    position: relative;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    padding: var(--spacing-2) var(--spacing-3);
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    font-size: var(--text-xs);
    color: var(--text-primary);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base), transform var(--transition-base);
    z-index: var(--z-tooltip);
}

.tooltip:hover::after {
    opacity: 1;
    transform: translateX(-50%) translateY(-4px);
}

/* ========================================
   SKELETONS (Loading states)
   ======================================== */
.skeleton {
    background: linear-gradient(90deg,
            var(--bg-tertiary) 25%,
            var(--bg-card-hover) 50%,
            var(--bg-tertiary) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--radius-md);
}

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

    100% {
        background-position: -200% 0;
    }
}

.skeleton-text {
    height: 1em;
    width: 100%;
}

.skeleton-title {
    height: 1.5em;
    width: 60%;
}

.skeleton-avatar {
    border-radius: 50%;
}

/* ========================================
   ICONS (Placeholder styles)
   ======================================== */
.icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1em;
    height: 1em;
}

.icon-sm {
    font-size: 16px;
}

.icon-md {
    font-size: 20px;
}

.icon-lg {
    font-size: 24px;
}

.icon-xl {
    font-size: 32px;
}

/* ========================================
   STICKY BACK BUTTON (bottom-left, matches scroll-to-top style)
   ======================================== */
.back-btn-fixed {
    position: fixed;
    bottom: 24px;
    left: 24px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--brand-gradient);
    color: #000;
    border: none;
    cursor: pointer;
    z-index: 999;
    font-size: var(--text-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    text-decoration: none;
    transition: transform 0.3s;
}

.back-btn-fixed:hover {
    transform: translateY(-2px);
    color: #000;
}

/* Mobile adjustments for back button */
@media (max-width: 768px) {
    .back-btn-fixed {
        bottom: 16px;
        left: 16px;
        width: 44px;
        height: 44px;
        font-size: var(--text-lg);
    }
}

/* ========================================
   TOOLTIPS
   ======================================== */
.tooltip-container {
    position: relative;
    display: inline-flex;
    align-items: center;
    cursor: help;
}

.tooltip-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    color: var(--text-muted);
    font-size: 10px;
    margin-left: var(--spacing-2);
    border: 1px solid var(--border-subtle);
    transition: all var(--transition-fast);
}

.tooltip-container:hover .tooltip-icon {
    color: var(--text-primary);
    border-color: var(--text-muted);
}

.tooltip-content {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    width: max-content;
    max-width: 280px;
    padding: var(--spacing-3);
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--text-xs);
    line-height: var(--leading-normal);
    text-align: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: var(--z-tooltip);
    box-shadow: var(--shadow-lg);
    pointer-events: none;
    margin-bottom: var(--spacing-2);
}

.tooltip-container:hover .tooltip-content {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.tooltip-content::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: var(--bg-elevated) transparent transparent transparent;
}