/* ============================================
   estilo.css — Gota a Gota
   Minimalista · Responsivo
   ============================================ */

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

:root {
    --ink: #111110;
    --ink-2: #555552;
    --ink-3: #999994;
    --paper: #fafaf8;
    --surface: #f2f2ef;
    --border: #e2e2de;
    --accent: #1a6b3a;
    --accent-lt: #eaf4ee;
    --accent-dk: #124d2a;
    --danger: #c0392b;
    --danger-lt: #fdf0ee;
    --radius: 10px;
    --shadow: 0 1px 3px rgba(0, 0, 0, .07), 0 4px 12px rgba(0, 0, 0, .05);
    --font: 'DM Sans', sans-serif;
    --serif: 'DM Serif Display', serif;
}

html {
    font-size: 16px;
}

body {
    font-family: var(--font);
    background: var(--paper);
    color: var(--ink);
    min-height: 100vh;
    line-height: 1.6;
}

/* ── TOPBAR ─────────────────────────────── */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    background: #fff;
    position: sticky;
    top: 0;
    z-index: 10;
}

.topbar__logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--ink);
}

.topbar__dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
}

.topbar__name {
    font-family: var(--serif);
    font-size: 1.1rem;
}

.topbar__back {
    font-size: .85rem;
    color: var(--ink-2);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: color .2s;
}

.topbar__back:hover {
    color: var(--accent);
}

/* ── HOME ───────────────────────────────── */
.home {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 48px;
    padding: 32px 16px;
}

.home__brand {
    text-align: center;
}

.home__dot {
    display: inline-block;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    margin-bottom: 16px;
}

.home__title {
    font-family: var(--serif);
    font-size: clamp(2.4rem, 7vw, 3.8rem);
    line-height: 1.1;
    letter-spacing: -.5px;
}

.home__sub {
    margin-top: 8px;
    color: var(--ink-2);
    font-size: .95rem;
    font-weight: 300;
}

.home__nav {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
    max-width: 320px;
}

/* ── BOTONES ────────────────────────────── */
.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    border-radius: var(--radius);
    font-family: var(--font);
    font-size: .95rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    border: 1.5px solid transparent;
    transition: all .18s ease;
}

.btn--primary {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.btn--primary:hover {
    background: var(--accent-dk);
    border-color: var(--accent-dk);
    transform: translateY(-1px);
}

.btn--ghost {
    background: transparent;
    color: var(--ink);
    border-color: var(--border);
}

.btn--ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-1px);
}

.btn--danger {
    background: var(--danger);
    color: #fff;
    border-color: var(--danger);
    font-size: .82rem;
    padding: 6px 14px;
}

.btn--danger:hover {
    opacity: .85;
}

.btn--sm {
    padding: 8px 16px;
    font-size: .85rem;
}

/* ── CONTENEDOR PÁGINA ──────────────────── */
.page {
    max-width: 760px;
    margin: 0 auto;
    padding: 40px 20px 80px;
}

.page__header {
    margin-bottom: 32px;
}

.page__title {
    font-family: var(--serif);
    font-size: clamp(1.6rem, 4vw, 2.2rem);
    letter-spacing: -.3px;
}

.page__sub {
    color: var(--ink-2);
    font-size: .9rem;
    margin-top: 4px;
}

/* ── FORMULARIO ─────────────────────────── */
.form-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 28px 24px;
    box-shadow: var(--shadow);
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group--full {
    grid-column: 1 / -1;
}

label {
    font-size: .8rem;
    font-weight: 500;
    color: var(--ink-2);
    text-transform: uppercase;
    letter-spacing: .5px;
}

input,
select {
    padding: 11px 14px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    font-family: var(--font);
    font-size: .95rem;
    color: var(--ink);
    background: var(--paper);
    transition: border-color .18s;
    outline: none;
    width: 100%;
}

input:focus,
select:focus {
    border-color: var(--accent);
}

input:read-only {
    background: var(--surface);
    color: var(--ink-2);
    cursor: default;
}

/* Preview de cálculo */
.calc-preview {
    margin-top: 20px;
    padding: 16px 18px;
    background: var(--accent-lt);
    border: 1px solid #c3e0cd;
    border-radius: var(--radius);
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.calc-preview__item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.calc-preview__label {
    font-size: .75rem;
    color: var(--accent);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: .4px;
}

.calc-preview__val {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--accent-dk);
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

/* Alerta éxito */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius);
    font-size: .9rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.alert--success {
    background: var(--accent-lt);
    color: var(--accent-dk);
    border: 1px solid #c3e0cd;
}

.alert--error {
    background: var(--danger-lt);
    color: var(--danger);
    border: 1px solid #f5c6c2;
}

/* ── TABLA ──────────────────────────────── */
.table-wrap {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: var(--shadow);
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 640px;
}

thead {
    background: var(--surface);
}

th {
    padding: 12px 16px;
    font-size: .75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: .5px;
    color: var(--ink-2);
    text-align: left;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

td {
    padding: 13px 16px;
    font-size: .9rem;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

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

tr:hover td {
    background: var(--surface);
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 99px;
    font-size: .75rem;
    font-weight: 500;
}

.badge--green {
    background: var(--accent-lt);
    color: var(--accent);
}

.empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--ink-3);
    font-size: .95rem;
}

/* ── RESPONSIVO ─────────────────────────── */
@media (max-width: 600px) {
    .form-grid {
        grid-template-columns: 1fr;
    }

    .form-group--full {
        grid-column: 1;
    }

    .form-actions {
        flex-direction: column-reverse;
    }

    .form-actions .btn {
        width: 100%;
        justify-content: center;
    }

    .page {
        padding: 24px 16px 60px;
    }

    .topbar {
        padding: 14px 16px;
    }
}