/* ============================================
   LAYOUT
   ============================================ */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.container--narrow {
    max-width: var(--container-narrow);
}

.page-content {
    padding-top: calc(var(--header-height) + var(--space-xl));
    padding-bottom: var(--space-4xl);
    min-height: 100vh;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.6em 1.4em;
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    line-height: 1;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    white-space: nowrap;
    user-select: none;
}

.btn--primary {
    background: var(--color-accent);
    color: #fff;
}

.btn--primary:hover {
    background: var(--color-accent-hover);
    box-shadow: var(--shadow-glow);
    color: #fff;
}

.btn--secondary {
    background: var(--color-bg-card);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

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

.btn--ghost {
    color: var(--color-text-secondary);
    padding: 0.5em 0.8em;
}

.btn--ghost:hover {
    color: var(--color-text);
    background: var(--color-accent-subtle);
}

.btn--icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-sm);
}

.btn--lg {
    padding: 0.8em 2em;
    font-size: var(--text-base);
}

/* ============================================
   CARDS
   ============================================ */

.card {
    background: var(--color-bg-card);
    border-radius: var(--card-radius);
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.card__image-wrap {
    position: relative;
    overflow: hidden;
    background: var(--color-bg-elevated);
}

.card__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.card:hover .card__image {
    transform: scale(1.03);
}

.card__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-base);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--space-md);
}

.card:hover .card__overlay {
    opacity: 1;
}

.card__body {
    padding: var(--space-md);
}

.card__title {
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    margin-bottom: var(--space-xs);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.card__meta {
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
}

.card__palette {
    display: flex;
    gap: 2px;
    margin-top: var(--space-sm);
}

.card__palette-color {
    flex: 1;
    height: 4px;
    border-radius: 2px;
}

/* ============================================
   MASONRY GRID
   ============================================ */

.masonry {
    columns: var(--grid-cols-mobile);
    column-gap: var(--grid-gap);
}

.masonry__item {
    break-inside: avoid;
    margin-bottom: var(--grid-gap);
}

@media (min-width: 640px) {
    .masonry {
        columns: var(--grid-cols-tablet);
    }
}

@media (min-width: 1024px) {
    .masonry {
        columns: var(--grid-cols-desktop);
    }
}

@media (min-width: 1400px) {
    .masonry {
        columns: 5;
    }
}

/* ============================================
   TAGS
   ============================================ */

.tag {
    display: inline-flex;
    align-items: center;
    padding: 0.25em 0.75em;
    font-size: var(--text-xs);
    font-weight: var(--weight-medium);
    color: var(--color-text-secondary);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.tag:hover {
    color: var(--color-accent);
    background: var(--color-accent-subtle);
}

.tag--active {
    color: #fff;
    background: var(--color-accent);
}

.tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

/* ============================================
   INPUTS
   ============================================ */

.input {
    width: 100%;
    padding: 0.65em 1em;
    font-size: var(--text-sm);
    background: var(--color-bg-input);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

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

.search-box {
    position: relative;
}

.search-box__icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    pointer-events: none;
}

.search-box .input {
    padding-left: 40px;
}

/* ============================================
   SECTION HEADERS
   ============================================ */

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
    gap: var(--space-md);
}

.section-title {
    font-size: var(--text-2xl);
    font-weight: var(--weight-bold);
}

.section-subtitle {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
}

/* ============================================
   TOOL CARD (larger, interactive)
   ============================================ */

.tool-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--card-radius);
    padding: var(--space-xl);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.tool-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.tool-card__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-subtle);
    color: var(--color-accent);
    border-radius: var(--radius-sm);
    font-size: var(--text-xl);
}

.tool-card__title {
    font-size: var(--text-lg);
    font-weight: var(--weight-semibold);
}

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

/* ============================================
   SKELETON LOADING
   ============================================ */

.skeleton {
    background: var(--color-bg-elevated);
    border-radius: var(--radius-sm);
    position: relative;
    overflow: hidden;
}

.skeleton::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.04), transparent);
    animation: skeleton-shimmer 1.5s infinite;
}

@keyframes skeleton-shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.skeleton--image {
    aspect-ratio: 3/4;
    border-radius: var(--card-radius);
}

.skeleton--text {
    height: 14px;
    width: 80%;
    margin-bottom: var(--space-sm);
}

.skeleton--text-short {
    height: 14px;
    width: 50%;
}

/* ============================================
   COLOR DOTS (palette preview)
   ============================================ */

.color-dots {
    display: flex;
    gap: 4px;
}

.color-dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2px solid var(--color-bg-card);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.color-dot:hover {
    transform: scale(1.3);
}

/* ============================================
   BACK TO TOP
   ============================================ */

.back-to-top {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 44px;
    height: 44px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-base);
    z-index: var(--z-sticky);
}

.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
}

.back-to-top:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
}

/* ============================================
   RESPONSIVE UTILITIES
   ============================================ */

.hide-mobile {
    display: none;
}

@media (min-width: 768px) {
    .hide-mobile {
        display: initial;
    }
    .hide-desktop {
        display: none;
    }
}

/* ============================================
   EMPTY STATE
   ============================================ */

.empty-state {
    text-align: center;
    padding: var(--space-4xl) var(--space-xl);
    color: var(--color-text-muted);
}

.empty-state__icon {
    font-size: 3rem;
    margin-bottom: var(--space-lg);
    opacity: 0.5;
}

.empty-state__title {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
}

.empty-state__text {
    font-size: var(--text-sm);
    max-width: 400px;
    margin: 0 auto;
}