:root {
    --brand-red: #d32f2f;
    --brand-orange: #f57c00;
    --brand-black: #212121;
    --brand-dark-gray: #424242;
    --brand-gray: #e0e0e0;
    --brand-light: #f5f5f5;
    --brand-white: #ffffff;
    --text-main: #212121;
    --text-muted: #757575;
    --transition: all 0.2s ease;
}

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

body {
    background-color: var(--brand-light);
    color: var(--text-main);
    overflow-x: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
}

/* SIDEBAR - Minimalist Black/Dark Gray */
.sidebar {
    width: 260px;
    background-color: var(--brand-black);
    color: var(--brand-white);
    display: flex;
    flex-direction: column;
    padding: 2rem 1.5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--brand-white);
}
.logo span {
    color: var(--brand-red);
    font-weight: 400;
}
.logo i {
    font-size: 1.8rem;
    color: var(--brand-orange);
}

.nav-menu {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px 16px;
    text-decoration: none;
    color: #bdbdbd;
    font-weight: 500;
    border-radius: 4px;
    transition: var(--transition);
}

.nav-item i {
    font-size: 1.2rem;
}

.nav-item:hover, .nav-item.active {
    background: var(--brand-dark-gray);
    color: var(--brand-white);
    border-left: 4px solid var(--brand-red);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 15px;
    padding-top: 1rem;
    border-top: 1px solid var(--brand-dark-gray);
}
.avatar {
    width: 40px;
    height: 40px;
    background: var(--brand-orange);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: var(--brand-white);
    border-radius: 4px;
}
.info h4 { font-size: 0.9rem; color: var(--brand-white); }
.info p { font-size: 0.8rem; color: #bdbdbd; }

/* MAIN CONTENT */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    background-color: var(--brand-light);
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2.5rem;
    background: var(--brand-white);
    border-bottom: 1px solid var(--brand-gray);
    position: sticky;
    top: 0;
    z-index: 10;
}

.search-bar {
    display: flex;
    align-items: center;
    background: var(--brand-light);
    padding: 8px 16px;
    border-radius: 4px;
    width: 350px;
    border: 1px solid var(--brand-gray);
}
.search-bar i { color: var(--text-muted); margin-right: 10px; }
.search-bar input {
    background: transparent;
    border: none;
    color: var(--text-main);
    outline: none;
    width: 100%;
}

.actions { display: flex; gap: 10px; }
.icon-btn {
    background: transparent;
    border: 1px solid var(--brand-gray);
    color: var(--text-main);
    width: 40px;
    height: 40px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
}
.icon-btn:hover { background: var(--brand-light); }

.content-area {
    padding: 2rem 2.5rem;
}

.page-section {
    display: none;
}
.page-section.active { display: block; }

.header-section { margin-bottom: 1.5rem; }
.header-section h1 { font-size: 1.8rem; font-weight: 600; margin-bottom: 0.2rem; }
.header-section p { color: var(--text-muted); font-size: 0.9rem; }

.flex-between { display: flex; justify-content: space-between; align-items: center; }

/* FLAT CARDS */
.card {
    background: var(--brand-white);
    border: 1px solid var(--brand-gray);
    border-radius: 4px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    display: flex;
    align-items: center;
    padding: 1.5rem;
    gap: 1.5rem;
}
.stat-card .icon {
    width: 50px; height: 50px;
    border-radius: 4px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem;
    background: var(--brand-light);
}
.stat-card .icon.red { color: var(--brand-red); }
.stat-card .icon.orange { color: var(--brand-orange); }
.stat-card .icon.black { color: var(--brand-black); }

.details h3 { font-size: 0.85rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.details h2 { font-size: 1.8rem; margin: 2px 0; color: var(--brand-black); }

/* TABLES */
.data-container { padding: 1rem; }
.table-responsive { overflow-x: auto; }
.data-table {
    width: 100%;
    border-collapse: collapse;
}
.data-table th, .data-table td {
    padding: 0.8rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--brand-gray);
    font-size: 0.9rem;
}
.data-table th {
    color: var(--brand-dark-gray);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
    background: var(--brand-light);
}
.data-table tbody tr:hover { background: #fafafa; }

.status-badge {
    padding: 4px 8px;
    border-radius: 2px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}
.status-abierto { background: #ffebee; color: var(--brand-red); border: 1px solid #ffcdd2; }
.status-proceso { background: #fff3e0; color: var(--brand-orange); border: 1px solid #ffe0b2; }
.status-cerrado { background: #f5f5f5; color: var(--brand-dark-gray); border: 1px solid #e0e0e0; }

/* BUTTONS */
.btn {
    padding: 8px 16px;
    border-radius: 4px;
    border: none;
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    display: inline-flex; align-items: center; gap: 8px;
    transition: var(--transition);
}
.btn-primary {
    background: var(--brand-red);
    color: var(--brand-white);
}
.btn-primary:hover { background: #b71c1c; }
.btn-secondary {
    background: var(--brand-dark-gray);
    color: var(--brand-white);
}
.btn-action {
    background: transparent;
    color: var(--brand-orange);
    border: 1px solid var(--brand-orange);
    padding: 4px 8px;
    font-size: 0.8rem;
}
.btn-action:hover { background: var(--brand-orange); color: white; }

/* MODAL - ENTERPRISE STYLE */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.6);
    display: none;
    align-items: center; justify-content: center;
    z-index: 1000;
}
.modal-overlay.active { display: flex; }
.modal {
    background: var(--brand-white);
    width: 400px;
    border-radius: 4px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    overflow: hidden;
}
.modal-header {
    background: var(--brand-black);
    color: var(--brand-white);
    padding: 1rem 1.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    display: flex; justify-content: space-between; align-items: center;
}
.modal-header i { cursor: pointer; }
.modal-body {
    padding: 1.5rem;
    font-size: 0.95rem;
    color: var(--brand-dark-gray);
}
.modal-footer {
    padding: 1rem 1.5rem;
    background: var(--brand-light);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    border-top: 1px solid var(--brand-gray);
}

/* LOGIN SCREEN */
.login-container { display: flex; height: 100vh; background: var(--brand-black); align-items: center; justify-content: center; }
.login-card { width: 380px; padding: 2rem; }
.login-header { text-align: center; margin-bottom: 2rem; color: var(--brand-black); }
.login-header i { font-size: 3rem; color: var(--brand-orange); }
.login-header h2 { font-size: 1.8rem; margin: 10px 0 5px; }
.login-header h2 span { color: var(--brand-red); font-weight: 400; }
.login-header p { color: var(--text-muted); font-size: 0.9rem; }

/* FORMS */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 5px; font-size: 0.85rem; font-weight: 600; color: var(--brand-dark-gray); }
.form-control { width: 100%; padding: 10px; border: 1px solid var(--brand-gray); border-radius: 4px; font-size: 0.95rem; }
.form-control:focus { outline: none; border-color: var(--brand-orange); }
.w-100 { width: 100%; }
.action-buttons-group { display: flex; gap: 10px; }