/* ============================================
   SiViNo 2 - Sistema de Visualização de Notas
   Estilos Principais
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
    --primary: #1a56db;
    --primary-dark: #1242a8;
    --primary-light: #e8eefb;
    --secondary: #059669;
    --accent: #f59e0b;
    --danger: #dc2626;
    --success: #16a34a;
    --warning: #ea580c;
    --bg: #f1f5f9;
    --bg-card: #ffffff;
    --text: #1e293b;
    --text-light: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -2px rgba(0,0,0,.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -4px rgba(0,0,0,.1);
    --radius: 10px;
    --radius-sm: 6px;
    --sidebar-width: 260px;
    --header-height: 64px;

    /* Cores do logo */
    --logo-s: #1a56db;
    --logo-i: #059669;
    --logo-v: #f59e0b;
    --logo-i2: #dc2626;
    --logo-n: #7c3aed;
    --logo-o: #059669;
    --logo-2: #ea580c;
}

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

body {
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14.5px;
    line-height: 1.6;
    min-height: 100vh;
}

/* ============== LOGO ============== */
.logo {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 28px;
    letter-spacing: -0.5px;
    display: inline-flex;
    align-items: baseline;
}
.logo .l-s { color: var(--logo-s); }
.logo .l-i { color: var(--logo-i); }
.logo .l-v { color: var(--logo-v); }
.logo .l-i2 { color: var(--logo-i2); }
.logo .l-n { color: var(--logo-n); }
.logo .l-o { color: var(--logo-o); }
.logo .l-2 { color: var(--logo-2); font-size: 0.7em; vertical-align: super; margin-left: 1px; }

.logo-sm { font-size: 22px; }
.logo-lg { font-size: 36px; }

.logo-subtitle {
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    font-weight: 500;
}

/* ============== LOGIN PAGE ============== */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1e293b 0%, #334155 50%, #1e293b 100%);
    padding: 20px;
}

.login-card {
    background: var(--bg-card);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 420px;
    padding: 48px 40px;
    text-align: center;
}

.login-card .logo { font-size: 38px; margin-bottom: 4px; }
.login-card .logo-subtitle { margin-bottom: 32px; display: block; }

.login-card h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text);
}

/* ============== FORMS ============== */
.form-group { margin-bottom: 18px; text-align: left; }
.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
}
.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    color: var(--text);
    background: #fff;
    transition: border-color .2s, box-shadow .2s;
    outline: none;
}
.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26,86,219,.15);
}
.form-control::placeholder { color: var(--text-muted); }

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

textarea.form-control { resize: vertical; min-height: 80px; }

.form-row { display: flex; gap: 16px; }
.form-row .form-group { flex: 1; }

.form-help {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ============== BUTTONS ============== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all .2s;
    text-decoration: none;
    line-height: 1.4;
    white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

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

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #15803d; color: #fff; }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; color: #fff; }

.btn-warning { background: var(--accent); color: #fff; }
.btn-warning:hover { background: #d97706; color: #fff; }

.btn-outline {
    background: transparent;
    border: 1.5px solid var(--border);
    color: var(--text);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }
.btn-block { width: 100%; }

.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

/* ============== LAYOUT: SIDEBAR + MAIN ============== */
.app-layout { display: flex; min-height: 100vh; }

.sidebar {
    width: var(--sidebar-width);
    background: #1e293b;
    color: #cbd5e1;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: transform .3s;
    overflow-y: auto;
}

.sidebar-header {
    padding: 24px 20px 16px;
    border-bottom: 1px solid rgba(255,255,255,.08);
}
.sidebar-header .logo { font-size: 24px; }
.sidebar-header .logo-subtitle { color: #94a3b8; font-size: 10px; display: block; margin-top: 2px; }

.sidebar-nav { padding: 12px 0; flex: 1; }
.sidebar-nav a, .sidebar-nav .nav-section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    color: #94a3b8;
    text-decoration: none;
    font-size: 13.5px;
    font-weight: 500;
    transition: all .15s;
    border-left: 3px solid transparent;
}
.sidebar-nav a:hover {
    color: #fff;
    background: rgba(255,255,255,.06);
}
.sidebar-nav a.active {
    color: #fff;
    background: rgba(26,86,219,.2);
    border-left-color: var(--primary);
}
.sidebar-nav .nav-section-title {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: #475569;
    margin-top: 16px;
    cursor: default;
    font-weight: 600;
}

.sidebar-nav a svg, .sidebar-nav a .nav-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    opacity: .75;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid rgba(255,255,255,.08);
    font-size: 13px;
}
.sidebar-footer .user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}
.sidebar-footer .user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
}
.sidebar-footer .user-name { font-weight: 600; color: #e2e8f0; }
.sidebar-footer .user-role { font-size: 11px; color: #64748b; }
.sidebar-footer a { color: #94a3b8; text-decoration: none; }
.sidebar-footer a:hover { color: #fff; }

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 0;
    min-height: 100vh;
}

.top-bar {
    height: var(--header-height);
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    position: sticky;
    top: 0;
    z-index: 50;
}
.top-bar h1 { font-size: 18px; font-weight: 700; color: var(--text); }
.top-bar .breadcrumb { font-size: 13px; color: var(--text-muted); }
.top-bar .breadcrumb a { color: var(--primary); text-decoration: none; }

.page-content { padding: 28px 30px; }

/* ============== CARDS ============== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    margin-bottom: 20px;
}
.card-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.card-header h2, .card-header h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
}
.card-body { padding: 24px; }
.card-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* ============== STAT CARDS ============== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    padding: 20px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
}
.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}
.stat-icon.blue { background: #dbeafe; color: #1d4ed8; }
.stat-icon.green { background: #dcfce7; color: #16a34a; }
.stat-icon.orange { background: #ffedd5; color: #ea580c; }
.stat-icon.purple { background: #f3e8ff; color: #7c3aed; }
.stat-icon.red { background: #fee2e2; color: #dc2626; }
.stat-info h3 { font-size: 26px; font-weight: 700; line-height: 1.2; }
.stat-info p { font-size: 13px; color: var(--text-light); font-weight: 500; }

/* ============== TABLES ============== */
.table-wrapper { overflow-x: auto; }

table {
    width: 100%;
    border-collapse: collapse;
}
table th, table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 13.5px;
}
table th {
    background: #f8fafc;
    font-weight: 600;
    color: var(--text-light);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .5px;
    white-space: nowrap;
}
table tbody tr:hover { background: #f8fafc; }
table td .actions { display: flex; gap: 6px; }

/* ============== BADGES ============== */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11.5px;
    font-weight: 600;
    line-height: 1.5;
}
.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-success { background: #dcfce7; color: #16a34a; }
.badge-danger { background: #fee2e2; color: #dc2626; }
.badge-warning { background: #ffedd5; color: #ea580c; }
.badge-info { background: #e0f2fe; color: #0284c7; }
.badge-purple { background: #f3e8ff; color: #7c3aed; }

/* ============== ALERTS ============== */
.alert {
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
}
.alert-success { background: #dcfce7; color: #15803d; border: 1px solid #bbf7d0; }
.alert-danger { background: #fee2e2; color: #b91c1c; border: 1px solid #fecaca; }
.alert-warning { background: #ffedd5; color: #c2410c; border: 1px solid #fed7aa; }
.alert-info { background: #dbeafe; color: #1d4ed8; border: 1px solid #bfdbfe; }

/* ============== MODAL ============== */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.modal-overlay.active { display: flex; }
.modal {
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 540px;
    max-height: 90vh;
    overflow-y: auto;
}
.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.modal-header h3 { font-size: 16px; font-weight: 700; }
.modal-close {
    background: none;
    border: none;
    font-size: 22px;
    cursor: pointer;
    color: var(--text-muted);
    padding: 4px;
}
.modal-body { padding: 24px; }
.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* ============== TABS ============== */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--border);
    margin-bottom: 24px;
}
.tab {
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all .15s;
    text-decoration: none;
    background: none;
    border-top: none;
    border-left: none;
    border-right: none;
    font-family: inherit;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }

.tab-content { display: none; }
.tab-content.active { display: block; }

/* ============== RESULTADO NOTAS ============== */
.resultado-badge {
    display: inline-block;
    padding: 6px 18px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: .3px;
}
.resultado-aprovado { background: #dcfce7; color: #15803d; border: 2px solid #86efac; }
.resultado-reprovado { background: #fee2e2; color: #b91c1c; border: 2px solid #fca5a5; }

/* ============== GRID DE NOTAS ============== */
.notas-input { width: 70px; text-align: center; }
.nota-cell { text-align: center; font-weight: 600; }
.nota-cell.boa { color: var(--success); }
.nota-cell.media { color: var(--accent); }
.nota-cell.fraca { color: var(--danger); }

/* ============== EMPTY STATE ============== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}
.empty-state .icon { font-size: 48px; margin-bottom: 16px; opacity: .5; }
.empty-state h3 { font-size: 18px; color: var(--text-light); margin-bottom: 8px; }
.empty-state p { font-size: 14px; max-width: 400px; margin: 0 auto 20px; }

/* ============== MOBILE ============== */
.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text);
    padding: 4px;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.4);
    z-index: 99;
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.open { transform: translateX(0); }
    .sidebar-overlay.open { display: block; }
    .sidebar-toggle { display: block; }
    .main-content { margin-left: 0; }
    .page-content { padding: 20px 16px; }
    .top-bar { padding: 0 16px; }
    .form-row { flex-direction: column; gap: 0; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .card-body { padding: 16px; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
    .login-card { padding: 32px 24px; }
}

/* ============== UTILITIES ============== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-small { font-size: 12px; }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.hidden { display: none !important; }
.w-100 { width: 100%; }

/* Animação de loading */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2.5px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin .6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }