/**
 * KIPP Delta Insights - Unified Design System
 *
 * Based on Dashboard v2 style with dark slate navigation
 * Used across all pages: homepage, dashboard, nightly, deep-dives
 */

/* ============================================
   CSS VARIABLES
   ============================================ */
:root {
    /* Colors - Primary */
    --slate: #1a1a2e;
    --slate-light: #2d2d44;
    --cream: #faf8f5;
    --cream-dark: #f0ebe3;
    --ink: #16213e;

    /* Colors - Brand */
    --amber: #E67E22;
    --amber-dark: #d35400;
    --amber-light: rgba(230, 126, 34, 0.15);

    /* Colors - Semantic */
    --success: #059669;
    --success-light: #d1fae5;
    --warning: #d97706;
    --warning-light: #fef3c7;
    --danger: #dc2626;
    --danger-light: #fee2e2;
    --info: #0284c7;
    --info-light: #e0f2fe;

    /* Colors - Text */
    --text-primary: #1a1a2e;
    --text-secondary: #5c5347;
    --text-muted: #6b7280;
    --text-light: rgba(255, 255, 255, 0.9);
    --text-light-muted: rgba(255, 255, 255, 0.7);

    /* Typography */
    --font-display: 'Cormorant Garamond', Georgia, serif;
    --font-body: 'Outfit', system-ui, sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;

    /* Layout */
    --nav-height: 64px;
    --content-width: 800px;
    --content-wide: 1100px;
    --content-max: 1400px;

    /* Borders & Shadows */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15);
}

/* ============================================
   RESET & BASE
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--cream);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; margin-top: var(--space-xl); margin-bottom: var(--space-md); }
h3 { font-size: 1.5rem; margin-top: var(--space-lg); margin-bottom: var(--space-sm); }
h4 { font-size: 1.25rem; }

p { margin-bottom: var(--space-md); }

a {
    color: var(--amber);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--amber-dark);
}

code, pre {
    font-family: var(--font-mono);
}

/* ============================================
   NAVIGATION - Dark Slate Header
   ============================================ */
.site-nav {
    background: var(--slate);
    color: var(--text-light);
    padding: 0 var(--space-md);
    height: var(--nav-height);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-inner {
    max-width: var(--content-max);
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Brand / Logo */
.nav-brand {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    line-height: 1.2;
}

.nav-brand-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--cream);
}

.nav-brand-title .highlight {
    color: var(--amber);
}

.nav-brand-org {
    font-family: var(--font-body);
    font-size: 0.7rem;
    color: var(--text-light-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Nav Links */
.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.nav-links a {
    color: var(--text-light-muted);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--cream);
    background: rgba(255, 255, 255, 0.1);
}

/* Mobile Hamburger */
.nav-hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    gap: 5px;
}

.nav-hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--cream);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* Hamburger Animation */
.nav-hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-hamburger.active span:nth-child(2) {
    opacity: 0;
}

.nav-hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Auth Container in Nav */
.auth-container {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-left: var(--space-md);
}

.sign-in-btn {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.5rem 1rem;
    background: var(--amber);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s ease;
}

.sign-in-btn:hover {
    background: var(--amber-dark);
}

.sign-in-btn svg {
    width: 18px;
    height: 18px;
}

.user-info {
    display: none;
    align-items: center;
    gap: var(--space-xs);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

.user-name {
    font-size: 0.875rem;
    color: var(--cream);
    font-weight: 500;
}

.sign-out-btn {
    padding: 0.25rem 0.75rem;
    background: transparent;
    color: var(--text-light-muted);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.sign-out-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--cream);
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.site-main {
    flex: 1;
}

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

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

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

/* ============================================
   CARDS
   ============================================ */
.card {
    background: white;
    border-radius: var(--radius-md);
    padding: var(--space-md);
    box-shadow: var(--shadow-sm);
}

.metric-card {
    background: white;
    border-radius: var(--radius-md);
    padding: var(--space-md);
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--amber);
}

.metric-card .metric-value {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

.metric-card .metric-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: var(--space-xs);
}

.metric-card .metric-delta {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    margin-top: var(--space-xs);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.625rem 1.25rem;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    border: none;
}

.btn-primary {
    background: var(--amber);
    color: white;
}

.btn-primary:hover {
    background: var(--amber-dark);
    color: white;
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--cream-dark);
}

.btn-secondary:hover {
    background: var(--cream-dark);
}

.btn-outline {
    background: transparent;
    color: var(--amber);
    border: 1px solid var(--amber);
}

.btn-outline:hover {
    background: var(--amber);
    color: white;
}

/* ============================================
   BADGES & STATUS
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-sm);
}

.badge-success {
    background: var(--success-light);
    color: var(--success);
}

.badge-warning {
    background: var(--warning-light);
    color: var(--warning);
}

.badge-danger {
    background: var(--danger-light);
    color: var(--danger);
}

.badge-info {
    background: var(--info-light);
    color: var(--info);
}

.badge-amber {
    background: var(--amber);
    color: white;
}

/* Status Badges */
.status-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.status-badge.strong {
    background-color: var(--success-light);
    color: #155724;
}

.status-badge.on-track {
    background-color: var(--warning-light);
    color: #856404;
}

.status-badge.watch {
    background-color: #ffe5d0;
    color: #d35400;
}

.status-badge.critical {
    background-color: var(--danger-light);
    color: #721c24;
}

/* Delta Indicators */
.delta {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 500;
}

.delta.positive {
    color: var(--success);
}

.delta.negative {
    color: var(--danger);
}

.delta.neutral {
    color: var(--text-muted);
}

/* ============================================
   TABLES
   ============================================ */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.data-table thead {
    background: var(--cream-dark);
}

.data-table th {
    font-family: var(--font-body);
    font-weight: 600;
    text-align: left;
    padding: var(--space-sm);
    border-bottom: 2px solid var(--amber);
    color: var(--text-primary);
}

.data-table td {
    padding: var(--space-sm);
    border-bottom: 1px solid var(--cream-dark);
}

.data-table td.num {
    text-align: right;
    font-family: var(--font-mono);
}

.data-table tbody tr:hover {
    background-color: var(--amber-light);
}

/* ============================================
   SECONDARY FILTER ROW (Deep-Dive Pages)
   ============================================ */
.filter-row {
    background: var(--slate-light);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.filter-row-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 2rem;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-group label {
    color: rgba(255,255,255,0.5);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.filter-select {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    color: white;
    padding: 0.5rem 2.25rem 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-family: var(--font-body);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='rgba(255,255,255,0.7)' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    min-width: 140px;
    transition: all 0.2s ease;
}

.filter-select:hover {
    background-color: rgba(255,255,255,0.15);
    border-color: rgba(255,255,255,0.3);
}

.filter-select:focus {
    outline: none;
    border-color: rgba(255,255,255,0.5);
}

.filter-select option {
    background: var(--slate);
    color: white;
}

.filter-select option:disabled {
    color: rgba(255,255,255,0.4);
}

.filter-select.school-select {
    min-width: 200px;
}

@media (max-width: 768px) {
    .filter-row-inner {
        padding: 0.5rem 1rem;
        gap: 1rem;
    }

    .filter-group label {
        display: none;
    }

    .filter-select,
    .filter-select.school-select {
        min-width: 0;
        flex: 1;
    }
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
    background: var(--slate);
    color: var(--text-light);
    padding: var(--space-lg) var(--space-md);
    margin-top: auto;
}

.footer-inner {
    max-width: var(--content-max);
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-md);
}

.footer-brand {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--cream);
}

.footer-nav {
    display: flex;
    gap: var(--space-md);
}

.footer-nav a {
    color: var(--text-light-muted);
    font-size: 0.875rem;
    transition: color 0.2s ease;
}

.footer-nav a:hover {
    color: var(--cream);
}

.footer-meta {
    font-size: 0.875rem;
    color: var(--text-light-muted);
}

/* ============================================
   LOGIN OVERLAY
   ============================================ */
#login-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 26, 46, 0.97);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

.login-overlay-content {
    background: white;
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    max-width: 400px;
}

.login-overlay-content h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.login-overlay-content p {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

/* ============================================
   AUTH ERROR
   ============================================ */
.auth-error {
    display: none;
    position: fixed;
    top: calc(var(--nav-height) + 1rem);
    left: 50%;
    transform: translateX(-50%);
    background: var(--danger-light);
    color: #721c24;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

/* ============================================
   RESPONSIVE - MOBILE
   ============================================ */
@media (max-width: 768px) {
    :root {
        --nav-height: 56px;
    }

    /* Show hamburger */
    .nav-hamburger {
        display: flex;
    }

    /* Mobile nav dropdown */
    .nav-links {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: var(--slate);
        flex-direction: column;
        padding: var(--space-sm);
        gap: 0;
        border-top: 1px solid var(--slate-light);
        box-shadow: var(--shadow-lg);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        padding: 0.75rem var(--space-sm);
        border-radius: 0;
        border-bottom: 1px solid var(--slate-light);
    }

    .nav-links a:last-child {
        border-bottom: none;
    }

    /* Auth in mobile */
    .auth-container {
        margin-left: auto;
        margin-right: var(--space-sm);
    }

    .user-name {
        display: none;
    }

    /* Typography */
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }

    /* Footer */
    .footer-inner {
        flex-direction: column;
        text-align: center;
    }

    .footer-nav {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    :root {
        --space-md: 1rem;
        --space-lg: 1.5rem;
    }

    h1 { font-size: 1.75rem; }

    .sign-in-btn span {
        display: none;
    }

    .sign-in-btn {
        padding: 0.5rem;
    }
}