:root {
    /* Tema "claro" (default) — celeste y blanco con acentos dorados. */
    --color-bg: #f2f9fc;
    --color-surface: #ffffff;
    --color-border: #cfe6f2;
    --color-text: #163140;
    --color-text-muted: #5a7684;
    --color-primary: #1e93c9;
    --color-primary-dark: #146a94;
    --color-navy: #123b53;
    --color-navy-dark: #0b2635;
    --color-gold: #d4a017;
    --color-danger: #b3493f;
    --radius: 8px;
    --shadow: 0 1px 2px rgba(20, 30, 40, 0.08);
    --transition: 0.15s ease;
}

[data-theme="pastel"] {
    --color-bg: #f8d9ec;
    --color-surface: #ffffff;
    --color-border: #f0b8d9;
    --color-text: #4a3350;
    --color-text-muted: #8d7793;
    --color-primary: #c07bc2;
    --color-primary-dark: #9c5aa0;
    --color-navy: #7c5aa8;
    --color-navy-dark: #5f3f85;
    --color-gold: #e3a8c7;
    --color-danger: #c1667a;
    --shadow: 0 1px 3px rgba(150, 60, 130, 0.14);
}

[data-theme="oscuro"] {
    --color-bg: #14181b;
    --color-surface: #1d2226;
    --color-border: #2b3237;
    --color-text: #e7ecec;
    --color-text-muted: #9aa7a7;
    --color-primary: #45b3a1;
    --color-primary-dark: #327f72;
    --color-navy: #8fb4e0;
    --color-navy-dark: #bcd4f0;
    --color-gold: #d7b46f;
    --color-danger: #e0776a;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
}

* {
    box-sizing: border-box;
}

@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        animation: none !important;
    }
}

body {
    margin: 0;
    font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    transition: background-color var(--transition), color var(--transition);
}

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

a:hover {
    text-decoration: underline;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

h1, h2, h3 {
    line-height: 1.25;
    margin: 0 0 0.6em;
}

h1 {
    font-size: 1.6rem;
}

h2 {
    font-size: 1.15rem;
    color: var(--color-text-muted);
    margin-top: 1.8em;
}

/* Header */

.site-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 0.75rem 1rem;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.6rem;
    position: sticky;
    top: 0;
    z-index: 50;
    transition: background-color var(--transition), border-color var(--transition);
}

.site-header-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.nav-toggle {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    width: 40px;
    height: 36px;
    padding: 0;
    cursor: pointer;
    flex-shrink: 0;
}

.nav-toggle:hover {
    background: var(--color-bg);
    transform: none;
    box-shadow: none;
}

.nav-toggle .bar {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--color-navy-dark);
    border-radius: 2px;
    transition: background-color var(--transition);
}

.nav-panel {
    display: none;
    flex-direction: column;
    gap: 0.75rem;
}

.nav-panel.open {
    display: flex;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-navy-dark);
}

.brand-logo {
    height: 32px;
    width: 32px;
    display: block;
    color: var(--color-navy-dark);
}

.brand-logo svg {
    width: 100%;
    height: 100%;
    display: block;
}

.site-nav {
    display: flex;
    justify-content: center;
    gap: 1rem 1.5rem;
    flex-wrap: wrap;
    width: 100%;
}

.site-nav a {
    color: var(--color-text);
    font-weight: 500;
    position: relative;
}

.site-nav a:hover {
    color: var(--color-primary);
    text-decoration: none;
}

.header-user {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    width: 100%;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.header-user form {
    margin: 0;
}

.theme-switch select {
    width: auto;
    padding: 0.3rem 0.5rem;
    font-size: 0.85rem;
}

/* Layout */

.container {
    max-width: 880px;
    margin: 0 auto;
    padding: 1rem 1rem 2.5rem;
}

section {
    margin-bottom: 1.5rem;
}

/* Messages */

.messages {
    list-style: none;
    margin: 1rem 0 0;
    padding: 0;
}

.messages li {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius);
    padding: 0.6rem 0.9rem;
    margin-bottom: 0.5rem;
}

/* Buttons */

.btn, button, input[type="submit"] {
    display: inline-block;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    padding: 0.5rem 1rem;
    font-size: 0.95rem;
    cursor: pointer;
    transition: background-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn:hover, button:hover, input[type="submit"]:hover {
    background: var(--color-primary-dark);
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.12);
}

.btn:active, button:active, input[type="submit"]:active {
    transform: translateY(0);
    box-shadow: none;
}

.btn-link {
    background: none;
    color: var(--color-primary);
}

.btn-link:hover {
    background: none;
    text-decoration: underline;
    transform: none;
    box-shadow: none;
}

.actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.filter-bar {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.6rem;
    margin-bottom: 1rem;
}

.filter-bar label {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* Cards / list */

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.25rem;
    margin-bottom: 1rem;
    transition: background-color var(--transition), border-color var(--transition);
}

.list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.list-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 0.4rem 1rem;
    transition: background-color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.list-item:hover {
    border-color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.06);
}

.list-item a {
    font-weight: 500;
}

.list-empty {
    color: var(--color-text-muted);
    font-style: italic;
}

/* Definition list (detail pages) */

.detail-grid {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.1rem 1.25rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.1rem 1.5rem;
    margin: 0;
}

.detail-grid dt {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    margin-top: 0.6rem;
}

.detail-grid dt:first-child {
    margin-top: 0;
}

.detail-grid dd {
    margin: 0;
}

/* Badges */

.badge {
    display: inline-block;
    border-radius: 999px;
    padding: 0.15rem 0.6rem;
    font-size: 0.78rem;
    font-weight: 600;
    background: #e6e9e6;
    color: var(--color-text-muted);
}

.badge-active, .badge-paid, .badge-done, .badge-delivered {
    background: #e3f1ea;
    color: var(--color-primary-dark);
}

.badge-inactive, .badge-pending {
    background: #f3e6d6;
    color: #8a5a25;
}

.badge-partial, .badge-scheduled {
    background: #eaf0f8;
    color: #3a5a8a;
}

/* Forms */

form p {
    margin: 0 0 0.9rem;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

form label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

input, select, textarea {
    width: 100%;
    font: inherit;
    padding: 0.45rem 0.6rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    color: var(--color-text);
    transition: outline-color var(--transition), border-color var(--transition), background-color var(--transition), color var(--transition);
}

input:focus, select:focus, textarea:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 1px;
}

input[type="checkbox"] {
    width: fit-content;
}

ul.errorlist {
    list-style: none;
    margin: 0 0 1rem;
    padding: 0.6rem 0.9rem;
    background: #fbeceb;
    border: 1px solid var(--color-danger);
    border-radius: var(--radius);
    color: var(--color-danger);
}

.formset {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
}

.formset-row {
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 0.75rem;
    margin-bottom: 0.75rem;
}

.formset-row:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.formset-row-invalid {
    background: #fbeceb;
    border-radius: var(--radius);
    padding: 0.6rem 0.75rem 0.75rem;
    margin-left: -0.75rem;
    margin-right: -0.75rem;
}

.formset-row-invalid select,
.formset-row-invalid input {
    border-color: var(--color-danger);
}

/* Tables */

.table-scroll {
    overflow-x: auto;
}

table {
    width: 100%;
    min-width: 320px;
    border-collapse: collapse;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
}

th, td {
    text-align: left;
    padding: 0.6rem 0.9rem;
    border-bottom: 1px solid var(--color-border);
}

th {
    background: var(--color-bg);
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

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

tbody tr, table tr:not(:first-child) {
    transition: background-color var(--transition);
}

tbody tr:hover, table tr:not(:first-child):hover {
    background: var(--color-bg);
}

/* Pagination */

.pagination {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
    margin-top: 1rem;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.auth-page {
    max-width: 360px;
    margin: 0 auto;
}

.auth-page > h1,
.auth-page > p {
    text-align: center;
}

.auth-page > .actions {
    justify-content: center;
}

.login-card {
    max-width: 360px;
    margin: 1.5rem auto 0;
}

.login-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 2rem;
}

.login-logo {
    display: block;
    height: 96px;
    width: 96px;
    color: var(--color-navy-dark);
}

.login-logo svg {
    width: 100%;
    height: 100%;
    display: block;
}

.login-wordmark {
    margin: 0.5rem 0 0;
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-navy-dark);
}

.login-title {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 1.1rem;
    font-weight: 500;
    margin-top: 0;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

.dashboard-grid .card {
    margin-bottom: 0;
    border-top: 3px solid var(--color-gold);
}

/* Dashboard */

.stat {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-navy-dark);
    margin: 0;
}

.stat-note {
    color: var(--color-text-muted);
    margin: 0.2rem 0 0;
}

/* Desktop / wide-viewport enhancements (mobile-first base above) */

@media (min-width: 640px) {
    .container {
        padding: 1.5rem 1.25rem 3rem;
    }

    .site-header {
        flex-direction: row;
        align-items: center;
        gap: 1.5rem;
        padding: 0.75rem 1.25rem;
    }

    .nav-toggle {
        display: none;
    }

    .nav-panel {
        display: flex !important;
        flex-direction: row;
        align-items: center;
        flex: 1;
        gap: 1.5rem;
    }

    .site-nav {
        flex: 1;
        width: auto;
        justify-content: flex-start;
    }

    .header-user {
        width: auto;
    }

    .filter-bar {
        flex-direction: row;
        align-items: center;
        flex-wrap: wrap;
    }

    .filter-bar input,
    .filter-bar select {
        width: auto;
    }

    .detail-grid {
        grid-template-columns: max-content 1fr;
        gap: 0.4rem 1.5rem;
        padding: 1.25rem 1.5rem;
    }

    .detail-grid dt {
        margin-top: 0;
    }

    .dashboard-grid {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }
}