/**
 * Phase 3-5: Visual Component Redesign & Refinements
 * Card system, loading states, empty states, and visual polish
 */

/* ============================================================================
   HERO SECTION (Redesigned)
   ============================================================================ */

.hero-section {
    background: var(--bg-secondary);
    border-bottom: var(--border-width) solid var(--border-color);
    padding: var(--space-48) var(--space-24);
}

.hero-content {
    max-width: 1000px;
    margin: 0 auto;
}

.hero-title {
    font-size: var(--h1);
    font-weight: var(--fw-bold);
    color: var(--text-primary);
    margin: 0 0 var(--space-8) 0;
    line-height: var(--lh-tight);
}

.hero-tagline {
    font-size: var(--body);
    color: var(--text-secondary);
    margin: 0 0 var(--space-32) 0;
    line-height: var(--lh-normal);
    max-width: 600px;
}

.hero-search-section {
    margin-bottom: var(--space-32);
}

.hero-search-box {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-primary);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-12) var(--space-16);
    max-width: 500px;
    transition: all var(--transition-base);
}

.hero-search-box:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-light);
}

.hero-search-box .material-icons-round {
    color: var(--text-tertiary);
    margin-right: var(--space-12);
    font-size: 20px;
}

.hero-search-input {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: var(--body-sm);
    outline: none;
}

.hero-search-input::placeholder {
    color: var(--text-tertiary);
}

.hero-chips-section {
    display: flex;
    align-items: center;
    gap: var(--space-12);
    flex-wrap: wrap;
}

.hero-chips-label {
    font-size: var(--caption);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: var(--ls-relaxed);
    font-weight: var(--fw-medium);
}

.hero-chips {
    display: flex;
    gap: var(--space-8);
    flex-wrap: wrap;
}

.hero-chip {
    background: var(--bg-tertiary);
    border: var(--border-width) solid var(--border-color);
    border-radius: 20px;
    padding: var(--space-8) var(--space-16);
    color: var(--text-primary);
    cursor: pointer;
    font-size: var(--caption);
    font-weight: var(--fw-medium);
    transition: all var(--transition-fast);
}

.hero-chip:hover {
    background: var(--accent-light);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* ============================================================================
   UNIFIED CARD SYSTEM
   ============================================================================ */

.card {
    background: var(--bg-secondary);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
    height: 100%;
    display: flex;
    flex-direction: column;
}

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

/* Card: Icon (Small - Category Grid) */

.card-icon {
    padding: var(--space-16);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-12);
}

.card-icon-container {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    position: relative;
}

.card-icon-container img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: var(--space-8);
    display: block;
    position: relative;
    z-index: 2;
}

.card-icon-container .icon-avatar-fallback {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

/* Avatar Initials */
.icon-avatar {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent), #0a84ff);
    border-radius: var(--radius-md);
    font-weight: var(--fw-bold);
    font-size: var(--h3);
    color: #ffffff;
    text-transform: uppercase;
}

.icon-avatar-small {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent), #0a84ff);
    border-radius: var(--radius-md);
    font-weight: var(--fw-semibold);
    font-size: var(--body-sm);
    color: #ffffff;
    text-transform: uppercase;
}

.icon-avatar-medium {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent), #0a84ff);
    border-radius: var(--radius-md);
    font-weight: var(--fw-bold);
    font-size: var(--h3);
    color: #ffffff;
    text-transform: uppercase;
}

/* Card: List Item (Medium) */

.card-list {
    padding: var(--space-20);
    display: flex;
    flex-direction: column;
    gap: var(--space-16);
}

.card-icon-small {
    width: 56px;
    height: 56px;
    min-width: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    position: relative;
}

.card-icon-small img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: var(--space-6);
    display: block;
    position: relative;
    z-index: 2;
}

.card-icon-small .icon-avatar-fallback {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

.card-content {
    flex: 1;
    min-width: 0;
}

.card-title {
    font-size: var(--body);
    font-weight: var(--fw-bold);
    color: var(--text-primary);
    margin: 0 0 var(--space-8) 0;
    line-height: var(--lh-tight);
}

.card-description {
    font-size: var(--caption);
    color: var(--text-secondary);
    margin: 0 0 var(--space-12) 0;
    line-height: var(--lh-relaxed);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-badge {
    display: inline-block;
    background: var(--accent-light);
    color: var(--accent-primary);
    font-size: 10px;
    font-weight: var(--fw-semibold);
    padding: var(--space-4) var(--space-8);
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-action {
    display: flex;
    align-items: center;
    width: 100%;
    margin-top: auto;
}

.card-visit-btn {
    display: block;
    width: 100%;
    padding: var(--space-12) var(--space-16);
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--body-sm);
    font-weight: var(--fw-semibold);
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-fast);
    text-align: center;
}

.card-visit-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(10, 132, 255, 0.3);
}

/* Card: Rich Card (Large - Search/Featured) */

.card-rich {
    padding: var(--space-20);
    display: flex;
    flex-direction: column;
    gap: var(--space-16);
}

.card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-12);
}

.card-icon-medium {
    width: 64px;
    height: 64px;
    min-width: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    position: relative;
}

.card-icon-medium img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: var(--space-8);
    display: block;
    position: relative;
    z-index: 2;
}

.card-icon-medium .icon-avatar-fallback {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

.card-meta {
    display: flex;
    gap: var(--space-8);
    flex-wrap: wrap;
    justify-content: flex-end;
}

.card-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.card-footer {
    display: flex;
    gap: var(--space-12);
    margin-top: auto;
}

.card-visit-btn-primary {
    display: block;
    width: 100%;
    padding: var(--space-12) var(--space-20);
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--body-sm);
    font-weight: var(--fw-semibold);
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-fast);
    text-align: center;
}

.card-visit-btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(10, 132, 255, 0.3);
}

.card-count {
    font-size: var(--caption);
    color: var(--text-tertiary);
    margin: 0;
}

/* ============================================================================
   SKELETON LOADERS (Animated)
   ============================================================================ */

.skeleton-container {
    display: grid;
    gap: var(--space-16);
}

.skeleton {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.skeleton-card {
    padding: var(--space-16);
    display: flex;
    flex-direction: column;
    gap: var(--space-12);
}

.skeleton-list {
    padding: var(--space-16);
    display: flex;
    gap: var(--space-12);
}

.skeleton-hero {
    padding: var(--space-32);
    display: flex;
    flex-direction: column;
    gap: var(--space-16);
}

.skeleton-box {
    background: linear-gradient(
        90deg,
        var(--bg-tertiary) 0%,
        var(--bg-primary) 50%,
        var(--bg-tertiary) 100%
    );
    background-size: 200% 100%;
    animation: skeletonLoadingAnimation 1.5s infinite;
    border-radius: var(--radius-sm);
}

.skeleton-icon,
.skeleton-icon-small,
.skeleton-icon-medium {
    height: 64px;
    width: 100%;
}

.skeleton-icon-small {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
}

.skeleton-title {
    height: 16px;
    width: 80%;
}

.skeleton-subtitle {
    height: 12px;
    width: 60%;
}

.skeleton-line-full {
    height: 14px;
    width: 100%;
}

.skeleton-line-short {
    height: 12px;
    width: 70%;
}

.skeleton-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

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

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

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-64) var(--space-24);
    text-align: center;
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-24);
}

.empty-state-icon .material-icons-round {
    font-size: 48px;
    color: var(--text-secondary);
}

.empty-state-title {
    font-size: var(--h2);
    font-weight: var(--fw-bold);
    color: var(--text-primary);
    margin: 0 0 var(--space-8) 0;
}

.empty-state-message {
    font-size: var(--body);
    color: var(--text-secondary);
    margin: 0;
    max-width: 400px;
    line-height: var(--lh-normal);
}

/* ============================================================================
   REFINED SCROLLBARS & VISUAL POLISH
   ============================================================================ */

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 5px;
    border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

/* ============================================================================
   SPACING & LAYOUT REFINEMENTS
   ============================================================================ */

/* Increase vertical rhythm */
.section {
    margin-bottom: var(--space-48);
}

.section-header {
    margin-bottom: var(--space-24);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.section-title {
    font-size: var(--h3);
    font-weight: var(--fw-bold);
    color: var(--text-primary);
    margin: 0;
}

.section-subtitle {
    font-size: var(--caption);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: var(--ls-relaxed);
    margin: 0;
}

.see-all-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--accent-primary);
    cursor: pointer;
    font-size: var(--body-sm);
    font-weight: var(--fw-semibold);
    display: flex;
    align-items: center;
    gap: var(--space-8);
    padding: var(--space-10) var(--space-16);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.see-all-btn:hover {
    background: var(--accent-light);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateX(4px);
}

/* Responsive grid adjustments */
.apps-grid {
    display: grid;
    gap: var(--space-20);
    margin-bottom: var(--space-24);
}

.apps-grid-4 {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}

.apps-grid-2 {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}

.apps-grid-1 {
    grid-template-columns: 1fr;
}

/* ============================================================================
   RESPONSIVE ADJUSTMENTS
   ============================================================================ */

@media (max-width: 1024px) {
    .hero-section {
        padding: var(--space-32) var(--space-16);
    }

    .hero-chips-label {
        display: none;
    }

    .hero-chips {
        width: 100%;
    }

    .hero-chip {
        flex: 1;
        min-width: 80px;
    }

    .apps-grid-4 {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }

    .apps-grid-2 {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
}

@media (max-width: 768px) {
    .hero-section {
        padding: var(--space-24) var(--space-12);
    }

    .hero-title {
        font-size: var(--h2);
    }

    .hero-tagline {
        font-size: var(--body-sm);
    }

    .hero-search-box {
        max-width: 100%;
    }

    .card-list {
        flex-direction: column;
        gap: var(--space-12);
    }

    .card-action {
        width: 100%;
    }

    .card-visit-btn {
        width: 100%;
        text-align: center;
    }

    .section {
        margin-bottom: var(--space-32);
    }

    .apps-grid-4,
    .apps-grid-2 {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-12);
    }

    .empty-state {
        padding: var(--space-48) var(--space-16);
    }
}

@media (max-width: 480px) {
    .hero-section {
        padding: var(--space-16) var(--space-12);
    }

    .hero-title {
        font-size: var(--h2);
        margin-bottom: var(--space-8);
    }

    .hero-tagline {
        font-size: var(--caption);
        margin-bottom: var(--space-20);
    }

    .hero-search-box {
        padding: var(--space-10) var(--space-12);
    }

    .hero-search-input {
        font-size: 16px;
    }

    .hero-chips-label {
        font-size: 10px;
    }

    .hero-chip {
        font-size: 11px;
        padding: var(--space-6) var(--space-10);
    }

    .card-icon-container,
    .card-icon-small,
    .card-icon-medium {
        width: 48px;
        height: 48px;
    }

    .card-title {
        font-size: var(--caption);
    }

    .card-description {
        font-size: 11px;
    }

    .card-visit-btn,
    .card-visit-btn-primary {
        font-size: 11px;
        padding: var(--space-8) var(--space-12);
    }

    .apps-grid-4,
    .apps-grid-2 {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }

    .empty-state {
        padding: var(--space-32) var(--space-16);
    }

    .empty-state-icon {
        width: 60px;
        height: 60px;
        margin-bottom: var(--space-16);
    }

    .empty-state-title {
        font-size: var(--h3);
    }
}