/* 
 * DESERT STONE DESIGN SYSTEM
 * Application Factory - Visual Standard v1.0
 */

:root {
    /* Light Mode (Desert Stone) */
    --bg-color: #E6DCCF;
    --text-main: #4F3F34;
    --text-muted: rgba(79, 63, 52, 0.6);
    --accent-color: #B87333;
    --accent-glow: rgba(184, 115, 51, 0.2);
    --glass-bg: rgba(255, 255, 255, 0.3);
    --glass-border: rgba(184, 115, 51, 0.3);
    --shadow: 0 12px 30px rgba(79, 63, 52, 0.1);
    --card-radius: 24px;
    --transition-smooth: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

[data-theme="dark"] {
    /* Dark Mode (Dark Desert) */
    --bg-color: #1F1C1A;
    --text-main: #E6DCCF;
    --text-muted: rgba(230, 220, 207, 0.6);
    --accent-color: #E68A4F;
    --accent-glow: rgba(230, 138, 79, 0.2);
    --glass-bg: rgba(31, 28, 26, 0.7);
    --glass-border: rgba(230, 138, 79, 0.3);
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    padding: 40px 20px;
    transition: background-color 0.5s ease, color 0.5s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* --- Global Navigation Sidebar --- */
.global-nav {
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    width: 70px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--glass-border);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 2000;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow);
}

.global-nav:hover {
    width: 260px;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 20px 22px;
    color: var(--text-main);
    text-decoration: none;
    transition: all 0.2s ease;
    white-space: nowrap;
    border-left: 3px solid transparent;
}

.nav-link:hover {
    background: var(--accent-glow);
    color: var(--accent-color);
    border-left-color: var(--accent-color);
}

.nav-link .icon {
    min-width: 24px;
    margin-right: 20px;
    font-size: 1.4rem;
    text-align: center;
    display: flex;
    justify-content: center;
}

.nav-link .label {
    opacity: 0;
    transition: opacity 0.2s ease;
    font-weight: 500;
    font-size: 1rem;
}

.global-nav:hover .label,
.global-nav.open .label {
    opacity: 1;
}

/* --- Header & Layout --- */
.sticky-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 15px;
}

.hamburger {
    display: none;
    cursor: pointer;
    padding: 5px;
    z-index: 2100;
}

.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-main);
    margin: 4px 0;
    transition: 0.3s;
}

.header-brand {
    font-weight: 800;
    font-size: 1.2rem;
    letter-spacing: -0.02em;
    color: var(--text-main);
    text-decoration: none;
    transition: color 0.3s ease;
}

.header-brand:hover {
    color: var(--accent-color);
}

/* --- Layout & Containers --- */

.container {
    width: 100%;
    max-width: 1200px;
    z-index: 1;
    margin-left: 0;
    transition: margin-left 0.3s ease;
}

.header-section {
    text-align: center;
    margin-bottom: 4rem;
}

.header-section h1 {
    font-weight: 800;
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin-bottom: 1rem;
    letter-spacing: -0.03em;
}

.header-section p {
    font-weight: 300;
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* --- Glassmorphism & Bento Grid --- */

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--card-radius);
    box-shadow: var(--shadow);
    transition: var(--transition-smooth);
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    grid-auto-rows: 240px;
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.featured-card {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
}

.featured-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-color);
    box-shadow: 0 15px 35px var(--accent-glow);
}

.card-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 1rem 1.5rem 0 1.5rem;
}

.category-tag {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 99px;
    background: var(--accent-glow);
    color: var(--accent-color);
    border: 1px solid var(--glass-border);
}

.featured-card .app-name {
    color: var(--text-main);
    font-weight: 700;
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.featured-card .app-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.featured-card .app-meta {
    font-size: 0.75rem;
    opacity: 0.6;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* --- Search & Filter --- */

.controls-bar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 3rem;
    align-items: center;
}

.search-wrapper {
    position: relative;
    width: 100%;
    max-width: 600px;
}

.search-input {
    width: 100%;
    padding: 1rem 1.5rem;
    padding-left: 3rem;
    border-radius: 100px;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

.search-icon {
    position: absolute;
    left: 1.2rem;
    top: 50%;
    transform: translateY(-50%);
    width: 1.2rem;
    height: 1.2rem;
    opacity: 0.5;
}

.category-tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
}

.tab {
    padding: 0.5rem 1.2rem;
    border-radius: 100px;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    color: var(--text-main);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.tab.active {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

/* --- Collapsible App List --- */

.apps-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
}

.collapsible-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
}

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

    .card-summary {
        padding: 0.8rem 1.5rem;
        display: flex;
        align-items: center;
        min-height: 48px; /* Mobile Touch Target */
    }

    .summary-info {
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 1rem;
    }

.summary-name {
    font-weight: 600;
    font-size: 1.1rem;
}

.summary-version {
    font-family: monospace;
    font-size: 0.8rem;
    opacity: 0.6;
}


.card-details {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.details-content {
    overflow: hidden;
    padding: 0 1.5rem;
    transition: padding 0.4s ease, opacity 0.3s ease;
    min-height: 0;
    opacity: 0;
    pointer-events: none;
}


.collapsible-card.expanded .card-details {
    grid-template-rows: 1fr;
}

.collapsible-card.expanded .details-content {
    padding: 1rem 1.5rem 2rem 1.5rem;
    opacity: 1;
    pointer-events: auto;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 2rem;
}

.detail-desc {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
    flex: 1;
}

.detail-date {
    font-size: 0.8rem;
    opacity: 0.5;
    text-align: right;
    white-space: nowrap;
}

/* --- Collapsible Card Action Link --- */

.card-action-link {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s ease;
    white-space: nowrap;
}

.card-action-link:hover {
    color: var(--text-main);
}

/* --- Sign In Button --- */

.btn-portal {
    background: var(--accent-color);
    color: white;
    padding: 8px 20px;
    border-radius: 14px;
    font-size: 0.85rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.btn-portal:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}

/* --- Mobile Adjustments --- */

@media (max-width: 768px) {
    .global-nav {
        width: 0;
        left: -260px;
        transition: left 0.3s ease, width 0.3s ease;
    }

    .global-nav.open {
        width: 260px;
        left: 0;
    }

    .hamburger {
        display: block;
    }

    .container {
        margin-left: 0;
    }

    .featured-grid {
        grid-template-columns: 1fr;
        grid-auto-rows: auto;
    }
    .card-wide, .card-tall {
        grid-column: span 1;
        grid-row: span 1;
    }
    .card-summary {
        grid-template-columns: 1fr;
        gap: 0.5rem;
        text-align: center;
        justify-items: center;
    }
}