/**
 * Chap Design System - Layout
 * App shell, grid, containers, sidebar, header
 */

/* ===== Containers ===== */
.container {
    width: 100%;
    max-width: var(--content-max-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

@media (min-width: 768px) {
    .container {
        padding-left: var(--space-6);
        padding-right: var(--space-6);
    }
}

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

.container-fluid {
    max-width: none;
}

/* ===== App Layout ===== */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* ===== Sidebar ===== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-primary);
    display: flex;
    flex-direction: column;
    z-index: var(--z-fixed);
    transition: transform var(--duration-slow) var(--ease-default),
                width var(--duration-slow) var(--ease-default);
}

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 var(--space-5);
    border-bottom: 1px solid var(--border-primary);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--text-primary);
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
}

.sidebar-logo-icon {
    width: 32px;
    height: 32px;
    color: var(--accent-blue);
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-4);
}

.sidebar-section {
    margin-bottom: var(--space-6);
}

.sidebar-section-title {
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0 var(--space-3);
    margin-bottom: var(--space-2);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2-5) var(--space-3);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    transition: var(--transition-all);
}

.sidebar-link:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.sidebar-link.active {
    background-color: var(--accent-blue-subtle);
    color: var(--accent-blue);
}

.sidebar-link-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: var(--space-4);
    border-top: 1px solid var(--border-primary);
}

.sidebar-team {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.sidebar-team-avatar {
    width: 32px;
    height: 32px;
    background-color: var(--accent-blue);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
}

.sidebar-team-name {
    flex: 1;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Sidebar Mobile */
@media (max-width: 1023px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .sidebar-overlay {
        position: fixed;
        inset: 0;
        background-color: rgba(0, 0, 0, 0.5);
        backdrop-filter: blur(4px);
        z-index: calc(var(--z-fixed) - 1);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-all);
    }
    
    .sidebar-overlay.open {
        opacity: 1;
        visibility: visible;
    }
}

/* ===== Main Content Area ===== */
.main-wrapper {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left var(--duration-slow) var(--ease-default);
}

@media (max-width: 1023px) {
    .main-wrapper {
        margin-left: 0;
    }
}

/* ===== Header ===== */
.header {
    position: sticky;
    top: 0;
    height: var(--header-height);
    background: var(--bg-glass-heavy);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-6);
    z-index: var(--z-sticky);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.header-menu-btn {
    display: none;
    padding: var(--space-2);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: var(--transition-all);
}

.header-menu-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

@media (max-width: 1023px) {
    .header-menu-btn {
        display: flex;
    }
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1);
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-full);
}

.theme-toggle-btn {
    padding: var(--space-1-5);
    border-radius: var(--radius-full);
    color: var(--text-tertiary);
    transition: var(--transition-all);
}

.theme-toggle-btn:hover {
    color: var(--text-primary);
}

.theme-toggle-btn.active {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.theme-toggle-btn svg {
    width: 16px;
    height: 16px;
}

/* User Menu */
.user-menu {
    position: relative;
}

.user-menu-trigger {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1-5) var(--space-2);
    border-radius: var(--radius-md);
    transition: var(--transition-all);
}

.user-menu-trigger:hover {
    background-color: var(--bg-tertiary);
}

.user-menu-name {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-primary);
}

.user-menu-chevron {
    width: 16px;
    height: 16px;
    color: var(--text-tertiary);
    transition: transform var(--duration-fast) var(--ease-default);
}

.user-menu.open .user-menu-chevron {
    transform: rotate(180deg);
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    padding: var(--space-6);
}

@media (max-width: 767px) {
    .main-content {
        padding: var(--space-4);
    }
}

/* ===== Page Header ===== */
.page-header {
    margin-bottom: var(--space-8);
}

.page-header-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-4);
    flex-wrap: wrap;
}

/* Allow the left block to shrink so truncation works (prevents overlap with actions). */
.page-header-top > .min-w-0 {
    flex: 1 1 auto;
}

.page-header-title {
    font-size: var(--text-3xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.page-header-description {
    font-size: var(--text-base);
    color: var(--text-secondary);
}

.page-header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-shrink: 0;
}

/* ===== Grid System ===== */
.grid {
    display: grid;
    gap: var(--space-6);
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (min-width: 640px) {
    .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .sm\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 768px) {
    .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
    .lg\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* Grid spans */
.col-span-1 { grid-column: span 1 / span 1; }
.col-span-2 { grid-column: span 2 / span 2; }
.col-span-3 { grid-column: span 3 / span 3; }
.col-span-full { grid-column: 1 / -1; }

@media (min-width: 768px) {
    .md\:col-span-2 { grid-column: span 2 / span 2; }
}

@media (min-width: 1024px) {
    .lg\:col-span-2 { grid-column: span 2 / span 2; }
    .lg\:col-span-3 { grid-column: span 3 / span 3; }
}

/* ===== Flex Utilities ===== */
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1 1 0%; }
.flex-shrink-0 { flex-shrink: 0; }

.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }

.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-5 { gap: var(--space-5); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* ===== Auth Layout ===== */
.auth-layout {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    background-color: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

/* Apple-glass style background layers */
.auth-layout::before {
    content: '';
    position: absolute;
    inset: -40%;
    background:
        radial-gradient(closest-side, rgba(10, 132, 255, 0.28), transparent 68%) 12% 18% / 55% 55% no-repeat,
        radial-gradient(closest-side, rgba(52, 199, 89, 0.18), transparent 70%) 82% 22% / 55% 55% no-repeat,
        radial-gradient(closest-side, rgba(255, 159, 10, 0.14), transparent 72%) 55% 85% / 65% 65% no-repeat;
    filter: blur(60px) saturate(160%);
    opacity: 0.85;
    pointer-events: none;
}

.auth-layout::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, rgba(0, 0, 0, 0.22), rgba(0, 0, 0, 0.55)),
        radial-gradient(1200px 800px at 50% 20%, rgba(255, 255, 255, 0.06), transparent 60%);
    pointer-events: none;
}

.auth-container {
    width: 100%;
    max-width: 440px;
    position: relative;
    z-index: 1;
}

.auth-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--space-8);
}

.auth-logo-mark {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    display: grid;
    place-items: center;
    margin-bottom: var(--space-3);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.10), rgba(255, 255, 255, 0.02)),
        var(--bg-glass);
    border: 1px solid var(--border-primary);
    box-shadow:
        0 18px 50px rgba(0, 0, 0, 0.35),
        inset 0 1px 0 rgba(255, 255, 255, 0.10);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
}

.auth-logo-icon {
    width: 28px;
    height: 28px;
    color: var(--accent-blue);
}

.auth-logo-text {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
}

.auth-logo-tagline {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-top: var(--space-1);
}

.auth-card {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.10), rgba(255, 255, 255, 0.02)),
        var(--bg-glass);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid var(--border-primary);
    border-radius: 20px;
    padding: calc(var(--space-8) + 2px);
    box-shadow:
        0 28px 80px rgba(0, 0, 0, 0.45),
        inset 0 1px 0 rgba(255, 255, 255, 0.10);
}

/* Auth form polish */
.auth-card .form-group {
    padding: 0;
}

.auth-card .input,
.auth-card .textarea,
.auth-card .select {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
    border-color: var(--border-primary);
}

.auth-card .input:focus,
.auth-card .textarea:focus,
.auth-card .select:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 4px rgba(10, 132, 255, 0.18);
}

.auth-title {
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-6);
}

.auth-divider {
    display: flex;
    align-items: center;
    margin: var(--space-6) 0;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background-color: var(--border-primary);
}

.auth-divider-text {
    padding: 0 var(--space-4);
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

.auth-footer {
    text-align: center;
    margin-top: var(--space-6);
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--accent-blue);
    font-weight: var(--font-medium);
}

/* ===== Guest/Landing Layout ===== */
.guest-layout {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.guest-header {
    position: sticky;
    top: 0;
    background: var(--bg-glass-heavy);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-primary);
    z-index: var(--z-sticky);
}

.guest-header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-4) var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.guest-nav {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.guest-main {
    flex: 1;
}

.guest-footer {
    border-top: 1px solid var(--border-primary);
    padding: var(--space-8) var(--space-6);
    text-align: center;
    color: var(--text-tertiary);
    font-size: var(--text-sm);
}

/* Hero Section */
.hero {
    position: relative;
    padding: var(--space-20) var(--space-6) var(--space-16);
    text-align: center;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: -200px -100px auto -100px;
    height: 520px;
    background:
        radial-gradient(closest-side, var(--accent-blue-subtle), transparent 70%),
        radial-gradient(closest-side, var(--accent-purple-subtle), transparent 70%),
        radial-gradient(closest-side, var(--accent-teal-subtle), transparent 70%);
    filter: blur(22px);
    opacity: 0.8;
    pointer-events: none;
}

.hero-inner {
    position: relative;
    max-width: 980px;
    margin: 0 auto;
}

.hero-title {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    margin-bottom: var(--space-6);
}

@media (min-width: 768px) {
    .hero-title {
        font-size: var(--text-5xl);
    }
}

.hero-title-accent {
    color: var(--accent-blue);
}

.hero-description {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-8);
    line-height: var(--leading-relaxed);
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}

@media (max-width: 639px) {
    .hero-actions {
        width: 100%;
    }

    .hero-actions .btn {
        width: 100%;
        max-width: 420px;
    }
}

/* Feature Section */
.features {
    padding: var(--space-20) var(--space-6);
}

.features-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    position: relative;
    overflow: hidden;
    background: var(--bg-glass);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-all);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 12px;
}

.feature-card:hover {
    border-color: var(--border-secondary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.features-list {
    padding-top: var(--space-12);
    border-top: 1px solid var(--border-primary);
}

/* ===== Stats Cards Row ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

@media (min-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.stat-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
}

.stat-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--space-3);
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.stat-value {
    font-size: var(--text-3xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
}

/* ===== Section ===== */
.section {
    margin-bottom: var(--space-8);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

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

/* ===== Two Column Layout ===== */
.two-column {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
}

@media (min-width: 1024px) {
    .two-column {
        grid-template-columns: 1fr 320px;
    }
}

.two-column-main {
    min-width: 0;
}

.two-column-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

/* ===== Three Column with Sidebar ===== */
.three-column {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
}

@media (min-width: 1024px) {
    .three-column {
        grid-template-columns: 2fr 1fr;
    }
}