/* ============================================
   SISTEMA DE LICITACIONES - CSS COMPLETO
   Tipografia: Montserrat
   Colores: Negro / Blanco / Amarillo (Gold)
   ============================================ */

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

/* Variables */
:root {
    --black: #000000;
    --white: #ffffff;
    --gold: #ffd700;
    --gold-dark: #e6c200;
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #eeeeee;
    --gray-300: #cccccc;
    --gray-400: #999999;
    --gray-500: #666666;
    --gray-600: #333333;
    --success: #28a745;
    --success-bg: #d4edda;
    --success-text: #155724;
    --danger: #dc3545;
    --danger-bg: #f8d7da;
    --danger-text: #721c24;
    --warning: #ffc107;
    --warning-bg: #fff3cd;
    --warning-text: #856404;
    --info: #17a2b8;
    --info-bg: #d1ecf1;
    --info-text: #0c5460;
    --radius: 6px;
    --shadow: 0 2px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 4px 24px rgba(0,0,0,0.12);
    --transition: 0.2s ease;
}

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

body {
    font-family: 'Montserrat', sans-serif;
    background-color: var(--gray-100);
    color: var(--black);
    line-height: 1.6;
    min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    color: var(--black);
    line-height: 1.3;
}

a { color: var(--black); text-decoration: none; }

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
    background-color: var(--black);
    color: var(--white);
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 60px;
}

.navbar-brand a {
    font-family: 'Montserrat', sans-serif;
    font-weight: 800;
    font-size: 1.15rem;
    color: var(--gold);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.navbar-link {
    color: var(--white);
    padding: 0.5rem 0.85rem;
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: var(--radius);
    transition: background var(--transition), color var(--transition);
}

.navbar-link:hover {
    background-color: rgba(255,255,255,0.1);
    color: var(--gold);
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: 1rem;
    padding-left: 1rem;
    border-left: 1px solid rgba(255,255,255,0.2);
}

.navbar-notif { position: relative; }

.notif-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--danger);
    color: var(--white);
    font-size: 0.65rem;
    font-weight: 700;
    padding: 1px 5px;
    border-radius: 10px;
    transform: translate(40%, -40%);
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-user-name {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--gold);
}

.navbar-user-role {
    font-size: 0.75rem;
    color: var(--gray-400);
}

.navbar-link-logout {
    color: var(--white);
    background: var(--danger);
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.8rem;
    font-weight: 600;
    transition: opacity var(--transition);
}

.navbar-link-logout:hover { opacity: 0.85; }

/* ============================================
   LAYOUT
   ============================================ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

.main-content {
    min-height: calc(100vh - 60px - 60px);
}

/* ============================================
   PAGE HEADER
   ============================================ */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-title {
    font-size: 1.75rem;
    font-weight: 800;
}

.page-actions {
    display: flex;
    gap: 0.75rem;
}

.page-breadcrumb {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-bottom: 1rem;
}

.page-breadcrumb a { color: var(--gray-500); }
.page-breadcrumb a:hover { color: var(--black); }

/* ============================================
   CARDS
   ============================================ */
.card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 2px solid var(--gold);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 0;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--gray-200);
    background: var(--gray-50);
}

/* ============================================
   KPI CARDS
   ============================================ */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.kpi-card {
    background: var(--white);
    padding: 1.25rem 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border-left: 4px solid var(--gold);
    transition: transform var(--transition);
}

.kpi-card:hover { transform: translateY(-2px); }

.kpi-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.35rem;
}

.kpi-value {
    font-size: 1.65rem;
    font-weight: 800;
    color: var(--black);
}

.kpi-success { border-left-color: var(--success); }
.kpi-success .kpi-value { color: var(--success); }
.kpi-danger { border-left-color: var(--danger); }
.kpi-danger .kpi-value { color: var(--danger); }
.kpi-highlight { border-left-color: var(--gold); }
.kpi-highlight .kpi-value { color: var(--gold-dark); }

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.65rem 1.35rem;
    border: 2px solid transparent;
    border-radius: var(--radius);
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn:hover { opacity: 0.85; transform: translateY(-1px); }

.btn-primary { background: var(--black); color: var(--white); }
.btn-secondary { background: var(--gold); color: var(--black); }
.btn-success { background: var(--success); color: var(--white); }
.btn-danger { background: var(--danger); color: var(--white); }
.btn-info { background: var(--info); color: var(--white); }
.btn-outline { background: transparent; border-color: var(--black); color: var(--black); }
.btn-outline:hover { background: var(--black); color: var(--white); }
.btn-block { width: 100%; }
.btn-sm { padding: 0.4rem 0.85rem; font-size: 0.8rem; }
.btn-lg { padding: 0.85rem 2rem; font-size: 1rem; }

.btn-group { display: flex; gap: 0.4rem; flex-wrap: wrap; }

/* ============================================
   FORMS
   ============================================ */
.form-group { margin-bottom: 1.25rem; }

.form-label {
    display: block;
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 0.4rem;
    color: var(--gray-600);
}

.form-label .required {
    color: var(--danger);
    margin-left: 2px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.65rem 0.85rem;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius);
    font-family: 'Montserrat', sans-serif;
    font-size: 0.9rem;
    color: var(--black);
    background: var(--white);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 0 3px rgba(255,215,0,0.2);
}

.form-input::placeholder { color: var(--gray-400); }

.form-textarea { min-height: 100px; resize: vertical; }

.form-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: flex-end;
}

.form-col { flex: 1; min-width: 180px; }
.form-col-auto { flex: 0 0 auto; }
.form-col-half { flex: 0 0 calc(50% - 0.5rem); }
.form-col-third { flex: 0 0 calc(33.33% - 0.67rem); }

.form-help {
    font-size: 0.8rem;
    color: var(--gray-400);
    margin-top: 0.25rem;
}

.form-error-text {
    font-size: 0.8rem;
    color: var(--danger);
    margin-top: 0.25rem;
}

/* Filter form */
.filter-form .form-row { align-items: flex-end; }

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

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

.data-table thead {
    background: var(--black);
    color: var(--white);
}

.data-table th {
    padding: 0.85rem 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.data-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--gray-200);
    vertical-align: middle;
}

.data-table tbody tr { transition: background var(--transition); }
.data-table tbody tr:hover { background: var(--gray-50); }
.data-table tbody tr:last-child td { border-bottom: none; }

/* ============================================
   BADGES
   ============================================ */
.badge {
    display: inline-block;
    padding: 0.2rem 0.65rem;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    white-space: nowrap;
}

.badge-borrador   { background: var(--gray-200); color: var(--gray-600); }
.badge-revision   { background: var(--warning-bg); color: var(--warning-text); }
.badge-aprobada   { background: var(--info-bg); color: var(--info-text); }
.badge-presentada { background: #cce5ff; color: #004085; }
.badge-adjudicada { background: var(--success-bg); color: var(--success-text); }
.badge-perdida    { background: var(--danger-bg); color: var(--danger-text); }
.badge-cancelada  { background: var(--gray-200); color: var(--gray-500); }
.badge-desierta   { background: #e2e3e5; color: #383d41; }
.badge-warning    { background: var(--warning); color: var(--black); }
.badge-success    { background: var(--success); color: var(--white); }

/* Priority badges */
.badge-baja     { background: var(--gray-200); color: var(--gray-600); }
.badge-media    { background: var(--info-bg); color: var(--info-text); }
.badge-alta     { background: var(--warning-bg); color: var(--warning-text); }
.badge-urgente  { background: var(--danger-bg); color: var(--danger-text); }

/* Task state badges */
.badge-pendiente   { background: var(--warning-bg); color: var(--warning-text); }
.badge-en_progreso { background: var(--info-bg); color: var(--info-text); }
.badge-completada  { background: var(--success-bg); color: var(--success-text); }

/* ============================================
   ALERTS
   ============================================ */
.alert {
    padding: 0.85rem 1.25rem;
    border-radius: var(--radius);
    margin-bottom: 1.25rem;
    font-weight: 500;
    font-size: 0.9rem;
    border-left: 4px solid transparent;
}

.alert-success { background: var(--success-bg); color: var(--success-text); border-left-color: var(--success); }
.alert-error   { background: var(--danger-bg); color: var(--danger-text); border-left-color: var(--danger); }
.alert-warning { background: var(--warning-bg); color: var(--warning-text); border-left-color: var(--warning); }
.alert-info    { background: var(--info-bg); color: var(--info-text); border-left-color: var(--info); }

/* ============================================
   LOGIN PAGE
   ============================================ */
.login-page {
    background: var(--black);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    width: 100%;
    max-width: 440px;
    padding: 1.5rem;
}

.login-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}

.login-header { text-align: center; margin-bottom: 2rem; }

.login-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--black);
    margin-bottom: 0.35rem;
}

.login-subtitle {
    font-size: 0.9rem;
    color: var(--gray-500);
}

.login-form { margin-bottom: 1.5rem; }

.login-footer {
    text-align: center;
    padding-top: 1.25rem;
    border-top: 1px solid var(--gray-200);
}

.login-footer p { margin-bottom: 0.25rem; }

/* ============================================
   TABS (detalle licitacion)
   ============================================ */
.tabs { margin-bottom: 1.5rem; }

.tabs-nav {
    display: flex;
    background: var(--gray-100);
    border-bottom: 2px solid var(--gray-200);
    overflow-x: auto;
    gap: 0;
}

.tab-link {
    padding: 0.85rem 1.5rem;
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--gray-500);
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    text-decoration: none;
}

.tab-link:hover { color: var(--black); background: var(--gray-200); }
.tab-link.active { color: var(--black); border-bottom-color: var(--gold); background: var(--white); }

.tab-content { display: none; padding: 1.5rem; }
.tab-content.active { display: block; }

/* ============================================
   DETAIL HEADER
   ============================================ */
.detail-header {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
    border-left: 5px solid var(--gold);
}

.detail-title {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.detail-meta {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    color: var(--gray-500);
    font-size: 0.85rem;
}

.detail-meta strong { color: var(--black); }

.detail-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

/* ============================================
   INFO GRID (datos detalle)
   ============================================ */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.info-item {
    padding: 0.85rem;
    background: var(--gray-50);
    border-radius: var(--radius);
    border-left: 3px solid var(--gold);
}

.info-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    margin-bottom: 0.2rem;
}

.info-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--black);
}

.info-value-lg { font-size: 1.25rem; }

/* ============================================
   COMMENTS
   ============================================ */
.comment-list { max-height: 500px; overflow-y: auto; }

.comment {
    padding: 1rem;
    background: var(--gray-50);
    border-radius: var(--radius);
    margin-bottom: 0.85rem;
    border-left: 3px solid var(--gold);
}

.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.comment-author { font-weight: 700; font-size: 0.9rem; }
.comment-date { font-size: 0.8rem; color: var(--gray-400); }
.comment-body { font-size: 0.9rem; line-height: 1.5; }

/* ============================================
   DOCUMENTS
   ============================================ */
.document-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--gray-200);
}

.document-item:last-child { border-bottom: none; }
.document-info { flex: 1; }
.document-name { font-weight: 600; margin-bottom: 0.15rem; }
.document-meta { font-size: 0.8rem; color: var(--gray-400); }
.document-actions { display: flex; gap: 0.4rem; }

/* ============================================
   ECONOMIC TABLE
   ============================================ */
.economic-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    padding: 1rem;
    background: var(--gray-50);
    border-radius: var(--radius);
    margin-top: 1rem;
}

.economic-summary-item { text-align: center; }
.economic-summary-label { font-size: 0.75rem; color: var(--gray-500); font-weight: 600; text-transform: uppercase; }
.economic-summary-value { font-size: 1.35rem; font-weight: 800; }

/* ============================================
   PROGRESS BAR
   ============================================ */
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--gray-200);
    border-radius: 4px;
    overflow: hidden;
    margin: 0.5rem 0;
}

.progress-fill {
    height: 100%;
    background: var(--gold);
    border-radius: 4px;
    transition: width 0.5s ease;
}

.progress-fill-success { background: var(--success); }
.progress-fill-danger { background: var(--danger); }

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--black);
    color: var(--gray-400);
    text-align: center;
    padding: 1.25rem 2rem;
    font-size: 0.8rem;
}

.footer-container { max-width: 1400px; margin: 0 auto; }

/* ============================================
   MODAL
   ============================================ */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active { display: flex; }

.modal-content {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius);
    max-width: 600px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--gold);
}

.modal-title { font-size: 1.2rem; font-weight: 700; }

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-400);
    transition: color var(--transition);
}

.modal-close:hover { color: var(--black); }

/* ============================================
   UTILITIES
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--gray-500); }
.text-small { font-size: 0.8rem; }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning-text); }
.text-bold { font-weight: 700; }

.link { color: var(--black); font-weight: 600; border-bottom: 1px solid var(--gold); }
.link:hover { color: var(--gold-dark); }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-center { display: flex; align-items: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }

.hidden { display: none; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .navbar-container { flex-wrap: wrap; }
    .navbar-menu { flex-wrap: wrap; gap: 0.15rem; width: 100%; padding: 0.5rem 0; }
    .navbar-right { margin-left: 0; padding-left: 0; border-left: none; width: 100%; padding-top: 0.5rem; border-top: 1px solid rgba(255,255,255,0.15); }
    .container { padding: 1rem; }
    .page-header { flex-direction: column; align-items: flex-start; }
    .form-row { flex-direction: column; }
    .form-col, .form-col-half, .form-col-third { flex: 1 1 100%; min-width: 100%; }
    .kpi-grid { grid-template-columns: repeat(2, 1fr); }
    .info-grid { grid-template-columns: 1fr; }
    .tabs-nav { gap: 0; }
    .tab-link { padding: 0.65rem 1rem; font-size: 0.8rem; }
    .detail-meta { flex-direction: column; gap: 0.5rem; }
}

@media (max-width: 480px) {
    .kpi-grid { grid-template-columns: 1fr; }
    .login-card { padding: 1.5rem; }
    .btn-group { flex-direction: column; }
}