/* =============================================================
   assets/css/style.css — Main Stylesheet
   =============================================================
   Design: Clean card-based UI with subtle glassmorphism accents
   Palette: Deep indigo + warm off-white + slate accents
   Fonts:   Sora (headings) + Plus Jakarta Sans (body)
   ============================================================= */

/* ── CSS Custom Properties (Variables) ───────────────────────
   Change these to retheme the entire project instantly         */
:root {
    /* Brand colours */
    --color-primary:      #4f46e5;   /* Indigo */
    --color-primary-dark: #3730a3;
    --color-primary-light:#e0e7ff;
    --color-accent:       #06b6d4;   /* Cyan pop */

    /* Role badge colours */
    --color-admin:        #7c3aed;
    --color-user:         #059669;

    /* Neutrals */
    --color-bg:           #f0f2f9;
    --color-surface:      #ffffff;
    --color-surface-2:    #f8f9ff;
    --color-border:       #e2e5f1;
    --color-text:         #1e1b4b;
    --color-text-muted:   #6b7280;

    /* Status colours */
    --color-success:      #065f46;
    --color-success-bg:   #d1fae5;
    --color-error:        #991b1b;
    --color-error-bg:     #fee2e2;

    /* Spacing */
    --space-xs:  0.25rem;
    --space-sm:  0.5rem;
    --space-md:  1rem;
    --space-lg:  1.5rem;
    --space-xl:  2rem;
    --space-2xl: 3rem;

    /* Radii */
    --radius-sm:   6px;
    --radius-md:   12px;
    --radius-lg:   20px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm:  0 1px 3px rgba(79,70,229,.08), 0 1px 2px rgba(0,0,0,.06);
    --shadow-md:  0 4px 20px rgba(79,70,229,.12), 0 2px 8px rgba(0,0,0,.07);
    --shadow-lg:  0 10px 40px rgba(79,70,229,.15), 0 4px 16px rgba(0,0,0,.08);

    /* Typography */
    --font-display: 'Sora', sans-serif;
    --font-body:    'Plus Jakarta Sans', sans-serif;
    --font-mono:    'Courier New', monospace;
}

/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    /* Subtle dot-grid background texture */
    background-image: radial-gradient(circle, #c7d0f8 1px, transparent 1px);
    background-size: 28px 28px;
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1, h2, h3, h4, h5 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text);
}

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

a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ── Layout Utility ───────────────────────────────────────── */
.text-muted { color: var(--color-text-muted); font-size: 0.9rem; }
main { flex: 1; }

/* ── Navbar ───────────────────────────────────────────────── */
.navbar {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
}

.nav-logo {
    font-size: 1.4rem;
    line-height: 1;
}

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

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-decoration: none;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: color 0.2s, background 0.2s;
}

.nav-link:hover {
    color: var(--color-primary);
    background: var(--color-primary-light);
    text-decoration: none;
}

.nav-user {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
}

.nav-logout {
    color: #ef4444;
}

.nav-logout:hover {
    background: #fee2e2;
    color: #b91c1c;
}

/* ── Flash Messages ───────────────────────────────────────── */
.flash {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-xl);
    font-size: 0.9rem;
    font-weight: 500;
    border-bottom: 1px solid transparent;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from { transform: translateY(-100%); opacity: 0; }
    to   { transform: translateY(0);     opacity: 1; }
}

.flash-success {
    background: var(--color-success-bg);
    color: var(--color-success);
    border-color: #a7f3d0;
}

.flash-error {
    background: var(--color-error-bg);
    color: var(--color-error);
    border-color: #fca5a5;
}

.flash-info {
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    border-color: #a5b4fc;
}

.flash-close {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    color: inherit;
    opacity: 0.6;
    padding: 0 var(--space-sm);
    line-height: 1;
}

.flash-close:hover { opacity: 1; }

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.625rem 1.25rem;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 2px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(79,70,229,.3);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(79,70,229,.4);
    color: #fff;
    text-decoration: none;
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: #fff;
    text-decoration: none;
}

.btn-sm  { padding: 0.375rem 0.875rem; font-size: 0.85rem; }
.btn-lg  { padding: 0.75rem 1.75rem;   font-size: 1rem; }
.btn-full { width: 100%; }

/* ── Forms ────────────────────────────────────────────────── */
.form-group {
    margin-bottom: var(--space-lg);
}

label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.label-link {
    font-weight: 500;
    font-size: 0.8rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
select,
textarea {
    width: 100%;
    padding: 0.7rem 1rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--color-text);
    background: var(--color-surface-2);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
    -webkit-appearance: none;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--color-primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(79,70,229,.12);
}

input::placeholder { color: #adb5bd; }

select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
    cursor: pointer;
}

.form-hint {
    display: block;
    margin-top: var(--space-xs);
    font-size: 0.78rem;
    color: var(--color-text-muted);
    line-height: 1.4;
}

/* ── Alert Boxes ──────────────────────────────────────────── */
.alert {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    margin-bottom: var(--space-lg);
    line-height: 1.5;
}

.alert ul {
    list-style: disc;
    padding-left: 1.2em;
}

.alert ul li { margin-bottom: 0.2rem; }

.alert-error {
    background: var(--color-error-bg);
    color: var(--color-error);
    border: 1px solid #fca5a5;
}

.alert-success {
    background: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid #6ee7b7;
}

/* ── Auth Pages (Login, Register, etc.) ───────────────────── */
.auth-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 64px);
    padding: var(--space-xl) var(--space-md);
}

.auth-card {
    width: 100%;
    max-width: 440px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.8);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--space-2xl);
    animation: fadeUp 0.4s ease;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

.auth-card-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.auth-logo {
    font-size: 2.5rem;
    margin-bottom: var(--space-sm);
    display: block;
    animation: spin 8s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

.auth-card-header h1 {
    font-size: 1.6rem;
    margin-bottom: var(--space-xs);
}

.auth-card-header p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.auth-footer {
    text-align: center;
    margin-top: var(--space-lg);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.demo-box {
    margin-top: var(--space-lg);
    padding: var(--space-md);
    background: var(--color-surface-2);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.78rem;
    color: var(--color-text-muted);
    line-height: 1.7;
    text-align: center;
}

/* ── Dashboard Pages ──────────────────────────────────────── */
.dashboard-wrapper {
    max-width: 1100px;
    margin: 0 auto;
    padding: var(--space-xl);
}

.dashboard-hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, #7c3aed 100%);
    border-radius: var(--radius-lg);
    padding: var(--space-xl) var(--space-2xl);
    color: white;
    margin-bottom: var(--space-xl);
    box-shadow: var(--shadow-md);
    animation: fadeUp 0.4s ease;
}

.dashboard-hero--admin {
    background: linear-gradient(135deg, #7c3aed 0%, #db2777 100%);
}

.dashboard-hero-inner {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.dashboard-avatar {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-full);
    background: rgba(255,255,255,0.25);
    border: 3px solid rgba(255,255,255,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.dashboard-hero h1 { color: white; font-size: 1.5rem; }
.dashboard-hero p  { color: rgba(255,255,255,0.8); margin-top: 0.2rem; }
.dashboard-hero strong { color: white; }

/* ── Stat Cards ───────────────────────────────────────────── */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
    animation: fadeUp 0.5s ease both;
}

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

.stat-card--highlight {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.stat-icon  { font-size: 1.5rem; margin-bottom: var(--space-sm); }
.stat-label { font-size: 0.8rem; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.05em; font-weight: 600; }
.stat-value { font-size: 1rem; font-weight: 600; margin-top: var(--space-xs); }
.stat-value--large { font-size: 2rem; font-family: var(--font-display); color: var(--color-primary); }

/* ── Info Panel ───────────────────────────────────────────── */
.info-panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-sm);
}

.info-panel h2 { margin-bottom: var(--space-md); font-size: 1.2rem; }

.feature-list { margin-top: var(--space-md); display: flex; flex-direction: column; gap: var(--space-sm); }
.feature-list li { font-size: 0.9rem; }

.panel-actions { margin-top: var(--space-lg); }

/* ── Table ────────────────────────────────────────────────── */
.table-panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    margin-bottom: var(--space-lg);
}

.table-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) var(--space-xl);
    border-bottom: 1px solid var(--color-border);
}

.table-panel-header h2 { font-size: 1.1rem; }

.table-wrapper { overflow-x: auto; }

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.data-table th {
    padding: var(--space-sm) var(--space-lg);
    text-align: left;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    background: var(--color-surface-2);
    border-bottom: 1px solid var(--color-border);
}

.data-table td {
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
}

.data-table tbody tr:last-child td { border-bottom: none; }

.data-table tbody tr:hover { background: var(--color-surface-2); }

.row-current { background: #f5f3ff !important; }

/* ── Badges ───────────────────────────────────────────────── */
.badge {
    display: inline-block;
    padding: 0.2em 0.6em;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-radius: var(--radius-full);
    vertical-align: middle;
}

.badge-admin {
    background: #ede9fe;
    color: var(--color-admin);
}

.badge-user {
    background: #d1fae5;
    color: var(--color-user);
}

/* ── Learning Note ────────────────────────────────────────── */
.learning-note {
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-left: 4px solid #f59e0b;
    border-radius: var(--radius-sm);
    padding: var(--space-md) var(--space-lg);
    font-size: 0.85rem;
    color: #92400e;
    margin-bottom: var(--space-md);
    line-height: 1.5;
}

.learning-note code {
    font-family: var(--font-mono);
    background: rgba(0,0,0,0.07);
    padding: 0.1em 0.4em;
    border-radius: 3px;
    font-size: 0.9em;
}

/* ── Landing / Hero ───────────────────────────────────────── */
.hero {
    padding: 5rem var(--space-xl);
    text-align: center;
    position: relative;
}

.hero-inner {
    max-width: 640px;
    margin: 0 auto;
    animation: fadeUp 0.6s ease;
}

.hero-badge {
    display: inline-block;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 0.3rem 0.9rem;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-lg);
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.15;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

.features {
    padding: var(--space-2xl) var(--space-xl);
    background: rgba(255,255,255,0.5);
    border-top: 1px solid var(--color-border);
}

.features-inner {
    max-width: 1100px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: var(--space-xl);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.feature-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.feature-icon { font-size: 2rem; margin-bottom: var(--space-md); }
.feature-card h3 { font-size: 1rem; margin-bottom: var(--space-sm); }
.feature-card p  { font-size: 0.875rem; color: var(--color-text-muted); line-height: 1.6; }

/* ── Footer ───────────────────────────────────────────────── */
.footer {
    text-align: center;
    padding: var(--space-lg);
    font-size: 0.8rem;
    color: var(--color-text-muted);
    border-top: 1px solid var(--color-border);
    background: var(--color-surface);
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 600px) {
    .nav-inner   { padding: 0 var(--space-md); }
    .nav-links   { gap: var(--space-sm); }
    .nav-user    { display: none; } /* Hide name on small screens */

    .auth-card   { padding: var(--space-xl) var(--space-lg); }

    .dashboard-wrapper { padding: var(--space-md); }
    .dashboard-hero    { padding: var(--space-lg); }
    .dashboard-hero-inner { flex-direction: column; text-align: center; }

    .hero    { padding: 3rem var(--space-md); }
    .features { padding: var(--space-xl) var(--space-md); }

    .table-panel-header { flex-direction: column; align-items: flex-start; gap: var(--space-sm); }
}