/* ============================================================
   Stepalyn AI — Global Stylesheet
   Design: Modern, Clean, Gamified-Edu
   Font: Plus Jakarta Sans
   ============================================================ */

/* ── Design Tokens ── */
:root {
    --primary:        #6C63FF;
    --primary-dark:   #554FCC;
    --primary-light:  #EEF0FF;
    --secondary:      #FF6584;
    --accent:         #43C6AC;
    --warning:        #FFB830;
    --success:        #3ECF8E;
    --danger:         #FF4E6A;

    --bg-base:        #F4F6FC;
    --bg-card:        #FFFFFF;
    --bg-dark:        #1A1D2E;
    --bg-dark-card:   #242740;

    --text-primary:   #1A1D2E;
    --text-muted:     #6B7280;
    --text-light:     #9CA3AF;

    --border:         #E5E7EB;
    --border-radius:  14px;
    --border-radius-sm: 8px;
    --border-radius-lg: 20px;

    --shadow-sm: 0 2px 8px rgba(108, 99, 255, 0.08);
    --shadow-md: 0 4px 24px rgba(108, 99, 255, 0.12);
    --shadow-lg: 0 8px 40px rgba(108, 99, 255, 0.16);

    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-base);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
}

.main-content {
    flex: 1;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }

/* ── Navbar ── */
.navbar-stepalyn {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    padding: 0.75rem 0;
}

.navbar-stepalyn .navbar-brand { font-weight: 800; font-size: 1.25rem; color: var(--text-primary) !important; }
.brand-icon { font-size: 1.5rem; }
.brand-name { background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

.navbar-stepalyn .nav-link {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-muted) !important;
    padding: 0.5rem 0.85rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
}
.navbar-stepalyn .nav-link:hover,
.navbar-stepalyn .nav-link.active {
    background: var(--primary-light);
    color: var(--primary) !important;
}

.xp-badge {
    background: linear-gradient(135deg, #FFB830, #FF6584);
    color: #fff;
    font-weight: 700;
    font-size: 0.8rem;
    padding: 0.3rem 0.85rem;
    border-radius: 100px;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.avatar-circle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px; height: 32px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    font-weight: 700;
    font-size: 0.85rem;
    border-radius: 50%;
    margin-right: 0.35rem;
}

.btn-profile {
    background: transparent;
    border: 2px solid var(--border);
    border-radius: 100px;
    padding: 0.3rem 0.85rem;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.3rem;
    transition: var(--transition);
}
.btn-profile:hover { border-color: var(--primary); color: var(--primary); }

.role-badge {
    font-size: 0.78rem;
    font-weight: 700;
    padding: 0.3rem 0.85rem;
    border-radius: 100px;
    display: inline-flex;
    align-items: center;
}
.role-admin   { background: rgba(108,99,255,0.1); color: var(--primary); }
.role-teacher { background: rgba(67,198,172,0.1); color: var(--accent); }

/* ── Cards ── */
.card {
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    background: var(--bg-card);
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card-header {
    background: transparent;
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.25rem;
    font-weight: 700;
}

/* ── Stat Cards ── */
.stat-card {
    border-radius: var(--border-radius);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border: none;
    transition: var(--transition);
}
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.stat-card .stat-icon {
    width: 56px; height: 56px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}
.stat-card .stat-value { font-size: 1.75rem; font-weight: 800; line-height: 1.1; }
.stat-card .stat-label { font-size: 0.8rem; font-weight: 600; color: rgba(255,255,255,0.8); margin-top: 0.2rem; }

.stat-purple { background: linear-gradient(135deg, #6C63FF, #8B84FF); color: #fff; }
.stat-teal   { background: linear-gradient(135deg, #43C6AC, #2DD4BF); color: #fff; }
.stat-orange { background: linear-gradient(135deg, #FFB830, #FF6584); color: #fff; }
.stat-green  { background: linear-gradient(135deg, #3ECF8E, #26A97A); color: #fff; }
.stat-blue   { background: linear-gradient(135deg, #4F9CF9, #3B82F6); color: #fff; }

.stat-purple .stat-icon { background: rgba(255,255,255,0.2); }
.stat-teal   .stat-icon { background: rgba(255,255,255,0.2); }
.stat-orange .stat-icon { background: rgba(255,255,255,0.2); }
.stat-green  .stat-icon { background: rgba(255,255,255,0.2); }
.stat-blue   .stat-icon { background: rgba(255,255,255,0.2); }

/* ── Buttons ── */
.btn {
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    padding: 0.5rem 1.25rem;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: none;
    color: #fff;
}
.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), #4540aa);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(108,99,255,0.4);
    color: #fff;
}
.btn-success {
    background: linear-gradient(135deg, var(--success), #26A97A);
    border: none; color: #fff;
}
.btn-success:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(62,207,142,0.4); color:#fff; }

.btn-outline-primary { border-color: var(--primary); color: var(--primary); }
.btn-outline-primary:hover { background: var(--primary); color: #fff; }

/* ── Progress Bars ── */
.progress {
    border-radius: 100px;
    background: var(--primary-light);
    height: 10px;
    overflow: hidden;
}
.progress-bar {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 100px;
    transition: width 0.8s ease;
}

/* ── Level Cards (Learning Path) ── */
.level-card {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    position: relative;
    cursor: pointer;
    transition: var(--transition);
}
.level-card.locked { opacity: 0.65; cursor: not-allowed; }
.level-card.locked::after {
    content: '🔒';
    position: absolute;
    top: 1rem; right: 1rem;
    font-size: 1.5rem;
}
.level-card:not(.locked):hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.level-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 0.75rem;
    border-radius: 100px;
    background: rgba(255,255,255,0.25);
    color: #fff;
    backdrop-filter: blur(4px);
}

/* ── Forms ── */
.form-control, .form-select {
    border-radius: var(--border-radius-sm);
    border: 2px solid var(--border);
    padding: 0.6rem 0.9rem;
    font-family: inherit;
    font-weight: 500;
    transition: var(--transition);
}
.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(108,99,255,0.15);
}
.form-label {
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
}

/* ── Tables ── */
.table {
    border-collapse: separate;
    border-spacing: 0;
}
.table thead th {
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    border-bottom: 2px solid var(--border);
    padding: 0.875rem 1rem;
    background: var(--bg-base);
}
.table tbody td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
    vertical-align: middle;
}
.table tbody tr:hover { background: var(--primary-light); }
.table tbody tr:last-child td { border-bottom: none; }

/* ── Badges / Pills ── */
.badge-difficulty {
    font-size: 0.72rem;
    font-weight: 700;
    padding: 0.3rem 0.75rem;
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.badge-easy   { background: rgba(62,207,142,0.15);  color: var(--success); }
.badge-medium { background: rgba(255,184,48,0.15);  color: var(--warning); }
.badge-hard   { background: rgba(255,78,106,0.15);  color: var(--danger);  }

.badge-status-active   { background: rgba(62,207,142,0.15); color: var(--success); }
.badge-status-inactive { background: rgba(107,114,128,0.15); color: var(--text-muted); }

/* ── Result / Score ── */
.score-circle {
    width: 120px; height: 120px;
    border-radius: 50%;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    margin: 0 auto;
    border: 6px solid;
    transition: var(--transition);
}
.score-correct   { border-color: var(--success); background: rgba(62,207,142,0.08); }
.score-incorrect { border-color: var(--danger);  background: rgba(255,78,106,0.08); }
.score-value { font-size: 2rem; font-weight: 800; line-height: 1; }
.score-label { font-size: 0.7rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; }

/* ── Step Analysis ── */
.step-item {
    border-radius: var(--border-radius-sm);
    padding: 0.875rem 1rem;
    margin-bottom: 0.5rem;
    border-left: 4px solid;
    background: var(--bg-base);
    font-size: 0.9rem;
}
.step-correct   { border-color: var(--success); }
.step-incorrect { border-color: var(--danger);  }
.step-partial   { border-color: var(--warning); }

/* ── Page Header ── */
.page-header {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    padding: 2.5rem 0;
    margin-bottom: 2rem;
    border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
}
.page-header h1 { font-weight: 800; font-size: 1.75rem; margin-bottom: 0.25rem; }
.page-header p  { opacity: 0.85; margin-bottom: 0; }

/* ── Empty State ── */
.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
}
.empty-state .empty-icon { font-size: 3.5rem; margin-bottom: 1rem; }
.empty-state h5 { font-weight: 700; margin-bottom: 0.5rem; }
.empty-state p  { color: var(--text-muted); margin-bottom: 1.5rem; }

/* ── Loading Spinner ── */
.spinner-overlay {
    position: fixed; inset: 0;
    background: rgba(26,29,46,0.5);
    display: flex; align-items: center; justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(4px);
}

/* ── Alerts ── */
.alert {
    border-radius: var(--border-radius-sm);
    border: none;
    font-weight: 500;
    padding: 0.875rem 1.125rem;
}
.alert-success { background: rgba(62,207,142,0.12); color: #166534; }
.alert-danger  { background: rgba(255,78,106,0.12);  color: #991B1B; }
.alert-warning { background: rgba(255,184,48,0.12);  color: #92400E; }
.alert-info    { background: rgba(79,156,249,0.12);  color: #1E40AF; }

/* ── Site Footer ── */
.site-footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    margin-top: auto;
}

/* ── Auth Pages ── */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #6C63FF 0%, #43C6AC 100%);
    padding: 2rem;
}
.auth-card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 2.5rem;
    width: 100%;
    max-width: 440px;
}
.auth-logo { font-size: 2.5rem; margin-bottom: 0.25rem; }
.auth-title { font-weight: 800; font-size: 1.5rem; }

/* ── Animations ── */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}
.fade-in-up { animation: fadeInUp 0.4s ease forwards; }

@keyframes pulse-xp {
    0%   { transform: scale(1); }
    50%  { transform: scale(1.15); }
    100% { transform: scale(1); }
}
.pulse-xp { animation: pulse-xp 0.6s ease; }

/* ── Utilities ── */
.text-gradient {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.fw-800 { font-weight: 800; }
.rounded-xl { border-radius: var(--border-radius-lg) !important; }
.gap-section { margin-bottom: 2rem; }

/* ── Responsive ── */
@media (max-width: 768px) {
    .page-header { padding: 1.75rem 0; }
    .page-header h1 { font-size: 1.4rem; }
    .stat-card { padding: 1.25rem; }
    .stat-card .stat-value { font-size: 1.5rem; }
    .auth-card { padding: 1.75rem; }
}

/* ── Role Badges ── */
.role-badge {
    display: inline-flex;
    align-items: center;
    font-size: 0.78rem;
    font-weight: 700;
    padding: 0.3rem 0.75rem;
    border-radius: 100px;
    gap: 0.25rem;
}
.role-admin   { background: #FEF3C7; color: #92400E; }
.role-teacher { background: #D1FAE5; color: #065F46; }
.role-student { background: #EDE9FE; color: #5B21B6; }

/* ── Stat Cards Additional Colors ── */
.stat-blue  { background: linear-gradient(135deg, #3B82F6, #1D4ED8); color: #fff; }
.stat-blue  .stat-value { color: #fff; }
.stat-blue  .stat-label { color: rgba(255,255,255,0.85); }

/* ── Vertical Step Analysis ── */
.step-analysis-container {
    display: flex;
    flex-direction: column;
    align-items: stretch;
}
.step-card-vertical {
    border-radius: var(--border-radius);
    padding: 1.25rem;
    border: 1.5px solid var(--border);
    background: white;
    box-shadow: var(--shadow-sm);
    margin-bottom: 0;
    transition: var(--transition);
}
.step-card-vertical:hover { box-shadow: var(--shadow-md); }
.step-card-correct  { border-left: 4px solid var(--success); }
.step-card-incorrect{ border-left: 4px solid var(--danger); }
.step-card-partial  { border-left: 4px solid var(--warning); }
.step-number-badge  {
    display: flex;
    align-items: center;
    font-weight: 800;
    font-size: 0.88rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
}
.step-description   { color: var(--text-primary); margin-bottom: 0.4rem; }
.step-work          {
    background: var(--bg-base);
    border-radius: var(--border-radius-sm);
    padding: 0.5rem 0.85rem;
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 700;
    margin-bottom: 0.4rem;
    font-family: 'Courier New', monospace;
}
.step-ai-note       { font-size: 0.82rem; color: var(--text-muted); font-style: italic; margin-top: 0.25rem; }
.step-arrow         { text-align: center; font-size: 1.5rem; color: var(--primary); font-weight: 700; padding: 0.4rem 0; }

/* ── Upload Area ── */
.upload-area {
    border: 2px dashed var(--border);
    border-radius: var(--border-radius);
    transition: var(--transition);
}
.upload-area:hover {
    border-color: var(--primary);
    background: var(--primary-light);
}

/* ── Assignment Card Status Badges ── */
.bg-purple-subtle { background: rgba(108,99,255,0.1) !important; }
.text-purple      { color: var(--primary) !important; }

/* ── Role Tab Buttons on Register ── */
.role-tab-btn {
    background: transparent;
    color: var(--text-muted);
    transition: var(--transition);
}
.role-tab-btn.active {
    background: var(--primary);
    color: #fff !important;
    box-shadow: var(--shadow-md);
}

/* ── Stat Card Blue ── */
.stat-blue { background: linear-gradient(135deg,#3B82F6,#1D4ED8); color:#fff; }