:root {
    --bg-color: #0f172a;
    --sidebar-bg: #1e293b;
    --card-bg: rgba(30, 41, 59, 0.7);
    --accent-color: #F0194F;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.1);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
aside {
    width: 260px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent-color);
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

nav ul {
    list-style: none;
}

nav ul li {
    margin-bottom: 0.5rem;
}

nav ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
    font-weight: 500;
}

.nav-badge {
    background: rgba(240, 25, 79, 0.15);
    color: var(--accent-color);
    font-size: 0.7rem;
    padding: 0.1rem 0.5rem;
    border-radius: 1rem;
    margin-left: auto;
    font-weight: 700;
    border: 1px solid rgba(240, 25, 79, 0.3);
}

nav ul li a:hover,
nav ul li a.active {
    background-color: var(--card-bg);
    color: var(--text-primary);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

nav ul li a.active {
    border-left: 4px solid var(--accent-color);
}

/* Main Content */
main {
    margin-left: 260px;
    flex: 1;
    padding: 2rem 3rem;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

h1 {
    font-size: 1.8rem;
    font-weight: 700;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 1rem;
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
}

.stat-trend {
    font-size: 0.8rem;
    margin-top: 0.5rem;
}

.trend-up {
    color: var(--success);
}

.trend-down {
    color: var(--danger);
}

/* Sections */
section {
    display: none;
    animation: fadeIn 0.5s ease;
}

section.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Tables */
.table-container {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    overflow: hidden;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    text-align: left;
    padding: 1rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

tr:last-child td {
    border-bottom: none;
}

.badge {
    padding: 0.25rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-pagada {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.badge-pendiente {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

.badge-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.badge-en-seguimiento,
.badge-enviada,
.badge-emitida {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

.badge-convertido,
.badge-aceptada,
.badge-pagada {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.badge-rechazada,
.badge-perdido {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.badge-pendiente-enviar,
.badge-pendiente {
    background: rgba(59, 130, 246, 0.1);
    color: var(--info);
}

/* Buttons */
.btn {
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.3s;
}

.btn-primary {
    background: var(--accent-color);
    color: white;
}

.btn-primary:hover {
    opacity: 0.9;
}

/* Grid for Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.project-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 1rem;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--sidebar-bg);
    padding: 2rem;
    border-radius: 1rem;
    width: 400px;
    border: 1px solid var(--border-color);
}

.modal-content h2 {
    margin-bottom: 1.5rem;
}

form label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

form input,
form select,
form textarea {
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 1rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    color: white;
    font-size: 0.9rem;
}

form select option {
    background: var(--sidebar-bg);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

.inline-link {
    color: var(--accent-color);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 600;
    transition: opacity 0.3s;
}

.inline-link:hover {
    text-decoration: underline;
    opacity: 0.8;
}

/* Kanban Board */
.kanban-board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    align-items: flex-start;
}

.kanban-column {
    background: rgba(15, 23, 42, 0.4);
    border-radius: 1rem;
    padding: 1rem;
    min-height: 500px;
}

.kanban-column h3 {
    font-size: 1rem;
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
}

.kanban-column h3 .count {
    background: var(--card-bg);
    padding: 0.2rem 0.6rem;
    border-radius: 0.5rem;
    font-size: 0.8rem;
}

.kanban-cards {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.task-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 1.25rem;
    border-radius: 0.75rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.task-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent-color);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.task-card h4 {
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
}

.task-card .task-info {
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.task-card .task-footer {
    margin-top: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.task-card .btn-edit {
    padding: 0.3rem 0.6rem;
    font-size: 0.7rem;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 0.4rem;
    cursor: pointer;
}

.task-card .btn-edit:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
}