:root {
    --udecic-navy: #0c2340;
    --udecic-navy-light: #163a66;
    --udecic-gold: #c69c2c;
    --udecic-gold-light: #e5be53;
    --bg-body: #f4f6f9;
    --bg-card: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --success-bg: #dcfce7;
    --success-text: #166534;
    --warning-bg: #fef9c3;
    --warning-text: #854d0e;
    --danger-bg: #fee2e2;
    --danger-text: #991b1b;
    --radius: 10px;
    --shadow-sm: 0 2px 6px rgba(12, 35, 64, 0.05);
    --shadow-md: 0 8px 24px rgba(12, 35, 64, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.5;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ==========================================================================
   HEADER INSTITUCIONAL
   ========================================================================== */
.site-header {
    background: linear-gradient(135deg, var(--udecic-navy) 0%, var(--udecic-navy-light) 100%);
    color: #ffffff;
    border-bottom: 4px solid var(--udecic-gold);
    box-shadow: var(--shadow-sm);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    text-decoration: none;
    color: #ffffff;
}

.brand-seal {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(198, 156, 44, 0.18);
    border: 2px solid var(--udecic-gold);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.05rem;
    color: var(--udecic-gold-light);
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

.brand-text h1 {
    margin: 0;
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: 0.3px;
}

.brand-text span {
    display: block;
    font-size: 0.82rem;
    color: #cbd5e1;
    font-weight: 400;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.nav-link {
    color: #e2e8f0;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.5rem 0.9rem;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
}

.nav-link-gold {
    background: var(--udecic-gold);
    color: #0c2340;
    font-weight: 600;
}

.nav-link-gold:hover {
    background: var(--udecic-gold-light);
    color: #0c2340;
}

/* ==========================================================================
   CONTENEDOR PRINCIPAL Y TARJETAS
   ========================================================================== */
.main-container {
    max-width: 1200px;
    width: 100%;
    margin: 2rem auto;
    padding: 0 1.5rem;
    flex: 1;
}

.hero-search {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 2.25rem;
    box-shadow: var(--shadow-md);
    border-top: 4px solid var(--udecic-navy);
    margin-bottom: 2rem;
}

.hero-search h2 {
    margin: 0 0 0.5rem 0;
    color: var(--udecic-navy);
    font-size: 1.55rem;
}

.hero-search p {
    margin: 0 0 1.5rem 0;
    color: var(--text-muted);
    font-size: 0.96rem;
}

.search-form {
    display: grid;
    grid-template-columns: 220px 1fr auto;
    gap: 0.85rem;
    align-items: stretch;
}

@media (max-width: 768px) {
    .search-form {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    padding-bottom: 1rem;
    margin-bottom: 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    margin: 0;
    font-size: 1.15rem;
    color: var(--udecic-navy);
    font-weight: 700;
}

/* ==========================================================================
   FORMULARIOS Y BOTONES
   ========================================================================== */
.form-group {
    margin-bottom: 1.1rem;
}

.form-label {
    display: block;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.4rem;
}

.form-control,
.form-select {
    width: 100%;
    padding: 0.7rem 0.9rem;
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--text-main);
    background-color: #ffffff;
    border: 1px solid #cbd5e1;
    border-radius: 7px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus,
.form-select:focus {
    outline: none;
    border-color: var(--udecic-navy-light);
    box-shadow: 0 0 0 3px rgba(22, 58, 102, 0.14);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    padding: 0.68rem 1.25rem;
    font-size: 0.92rem;
    font-weight: 600;
    font-family: inherit;
    border-radius: 7px;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.18s ease;
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--udecic-navy);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--udecic-navy-light);
}

.btn-gold {
    background-color: var(--udecic-gold);
    color: #0c2340;
}

.btn-gold:hover {
    background-color: var(--udecic-gold-light);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid #cbd5e1;
    color: var(--text-main);
}

.btn-outline:hover {
    background-color: #f8fafc;
    border-color: #94a3b8;
}

.btn-danger {
    background-color: #dc2626;
    color: #ffffff;
}

.btn-danger:hover {
    background-color: #b91c1c;
}

.btn-sm {
    padding: 0.4rem 0.75rem;
    font-size: 0.82rem;
}

/* ==========================================================================
   TABLAS Y ETIQUETAS (BADGES)
   ========================================================================== */
.table-responsive {
    width: 100%;
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}

.table th,
.table td {
    padding: 0.85rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.table th {
    background-color: #f8fafc;
    color: #475569;
    font-weight: 600;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.4px;
}

.table tr:hover td {
    background-color: #f8fafc;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    font-size: 0.78rem;
    font-weight: 600;
    border-radius: 999px;
}

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

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

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

.badge-navy {
    background-color: #e0e7ff;
    color: #1e3a8a;
}

.badge-gold {
    background-color: #fef3c7;
    color: #92400e;
}

/* ==========================================================================
   ALERTAS Y ESTADÍSTICAS
   ========================================================================== */
.alert {
    padding: 1rem 1.25rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.94rem;
    border-left: 4px solid transparent;
}

.alert-success {
    background-color: var(--success-bg);
    color: var(--success-text);
    border-left-color: #16a34a;
}

.alert-danger {
    background-color: var(--danger-bg);
    color: var(--danger-text);
    border-left-color: #dc2626;
}

.alert-warning {
    background-color: var(--warning-bg);
    color: var(--warning-text);
    border-left-color: #ca8a04;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 1.35rem 1.5rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--udecic-navy);
}

.stat-card.gold {
    border-left-color: var(--udecic-gold);
}

.stat-card .stat-label {
    font-size: 0.84rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
}

.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--udecic-navy);
    margin-top: 0.25rem;
}

/* ==========================================================================
   TARJETA DE ESTUDIANTE Y DOCUMENTOS EN RESULTADOS PÚBLICOS
   ========================================================================== */
.student-result-card {
    background: #ffffff;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.student-banner {
    background: #f8fafc;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.student-name {
    margin: 0;
    font-size: 1.2rem;
    color: var(--udecic-navy);
}

.student-meta {
    display: flex;
    gap: 1.25rem;
    flex-wrap: wrap;
    margin-top: 0.35rem;
    font-size: 0.88rem;
    color: var(--text-muted);
}

.student-meta strong {
    color: var(--text-main);
}

/* ==========================================================================
   MODAL VISOR DE PDF
   ========================================================================== */
.pdf-modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.75);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 1.25rem;
}

.pdf-modal-backdrop.open {
    display: flex;
}

.pdf-modal {
    background: #ffffff;
    width: 100%;
    max-width: 1020px;
    height: 88vh;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
}

.pdf-modal-header {
    padding: 0.9rem 1.25rem;
    background: var(--udecic-navy);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.pdf-modal-header h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
}

.pdf-modal-body {
    flex: 1;
    background: #334155;
}

.pdf-modal-body iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
    background: #ffffff;
    border-top: 1px solid var(--border-color);
    padding: 1.25rem 1.5rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: auto;
}