/* MyInvoice — interfaz sobria, móvil primero. */

:root {
    --accent: #252525;
    --ink: #1a1a1a;
    --ink-soft: #5c5c5a;
    --ink-faint: #8a8a87;
    --line: #e4e3df;
    --line-strong: #cfcdc7;
    --bg: #ffffff;
    --bg-soft: #f7f6f3;
    --error: #a61b1b;
    --error-bg: #fbf1f0;
    --ok: #1f6b45;
    --focus: #1a56db;
    --radius: 6px;
    --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
    --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color-scheme: light;
}

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

html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font: 400 1rem/1.55 var(--sans);
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
[hidden] { display: none !important; }

a { color: var(--ink); text-underline-offset: 3px; }
a:hover { color: var(--accent); }

:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 2px;
}

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

/* ---------- Barra demo ---------- */
.demo-bar {
    display: flex; flex-wrap: wrap; gap: .25rem .75rem;
    justify-content: center; align-items: baseline;
    padding: .6rem 1rem calc(.6rem);
    padding-top: calc(.6rem + env(safe-area-inset-top, 0px));
    background: #fff8e1;
    border-bottom: 1px solid #ecd9a0;
    color: #5a4500;
    font-size: .85rem; text-align: center;
}
.demo-bar strong { letter-spacing: .08em; text-transform: uppercase; font-size: .75rem; }

/* ---------- Página ---------- */
.page {
    max-width: 40rem;
    margin: 0 auto;
    padding: 2.5rem 1.25rem 3rem;
}

.masthead { text-align: center; margin-bottom: 2.25rem; }

.brand { min-height: 1rem; display: flex; justify-content: center; margin-bottom: 1.5rem; }
.brand:empty { margin-bottom: 0; }
.brand-logo { max-height: 88px; max-width: min(240px, 70%); width: auto; height: auto; object-fit: contain; }
.brand-name {
    margin: 0;
    font: 400 1.05rem/1.2 var(--sans);
    letter-spacing: .28em;
    text-transform: uppercase;
    color: var(--accent);
    padding: .6rem 1.1rem;
    border-top: 1px solid var(--line-strong);
    border-bottom: 1px solid var(--line-strong);
}

h1 {
    margin: 0 0 .9rem;
    font: 400 clamp(1.9rem, 6vw, 2.5rem)/1.15 var(--serif);
    letter-spacing: -.01em;
}

.intro {
    margin: 0 auto;
    max-width: 34rem;
    color: var(--ink-soft);
    font-size: 1rem;
}

/* ---------- Avisos ---------- */
.notice {
    margin: 0 0 1.5rem;
    padding: .9rem 1rem;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    background: var(--bg-soft);
    font-size: .95rem;
}
.notice-error { border-color: #e6c3c0; background: var(--error-bg); color: var(--error); }

.form-summary {
    margin-bottom: 1.5rem;
    padding: .9rem 1rem;
    border-left: 3px solid var(--error);
    background: var(--error-bg);
    color: var(--error);
    font-weight: 500;
}
.form-summary:focus { outline: none; }

.required-note { margin: 0 0 1.25rem; font-size: .85rem; color: var(--ink-faint); }

/* ---------- Secciones ---------- */
fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }

.section {
    padding: 1.75rem 0 .5rem;
    border-top: 1px solid var(--line);
}
.section > legend {
    float: left; width: 100%;
    display: flex; align-items: baseline; gap: .75rem;
    margin: 0 0 1.25rem; padding: 0;
    font: 400 1.35rem/1.25 var(--serif);
}
.section > legend ~ * { clear: both; }
.section-num {
    font: 500 .72rem/1 var(--sans);
    letter-spacing: .14em;
    color: var(--ink-faint);
}
.section-final { padding-top: 1.5rem; }
.section-hint { margin-top: -.5rem; }

/* ---------- Campos ---------- */
.field { margin-bottom: 1.25rem; }

.field > label,
.field > legend {
    display: block;
    margin-bottom: .4rem;
    font-size: .92rem;
    font-weight: 500;
    color: var(--ink);
    padding: 0;
}
.req { color: var(--error); }
.opt { font-weight: 400; color: var(--ink-faint); font-size: .85rem; }

input[type="text"], input[type="email"], input[type="tel"], input[type="date"],
select, textarea {
    display: block;
    width: 100%;
    min-height: 3rem;
    padding: .7rem .85rem;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    background: #fff;
    color: var(--ink);
    font: 400 1rem/1.4 var(--sans); /* 16px evita el zoom en iOS */
    transition: border-color .15s ease;
    appearance: none;
    -webkit-appearance: none;
}
input[type="date"] { min-width: 0; }
input[type="date"]::-webkit-date-and-time-value { text-align: left; }
input[type="date"]::-webkit-calendar-picker-indicator { padding: .35rem; border-radius: 4px; cursor: pointer; }
input[type="date"]::-webkit-calendar-picker-indicator:focus,
input[type="date"]::-webkit-calendar-picker-indicator:focus-visible { outline: 3px solid var(--focus); outline-offset: 1px; }
.field:focus-within > input[type="date"] { border-color: var(--ink); box-shadow: 0 0 0 3px rgba(26, 86, 219, .25); }
select {
    padding-right: 2.5rem;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='none' stroke='%235c5c5a' stroke-width='1.5' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right .9rem center;
}
textarea { min-height: 7rem; resize: vertical; }
input:hover, select:hover, textarea:hover { border-color: #a9a7a0; }
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--ink);
    box-shadow: 0 0 0 3px rgba(26, 86, 219, .25);
}
.input-amount { max-width: 14rem; }

.hint { margin: .4rem 0 0; font-size: .84rem; color: var(--ink-soft); }
.counter { text-align: right; }
.pending { color: #8a5a00; font-style: italic; }

.field-error {
    display: flex; gap: .4rem; align-items: flex-start;
    margin: .45rem 0 0;
    font-size: .86rem; font-weight: 500;
    color: var(--error);
}
.field-error::before { content: "!"; flex: none; display: inline-grid; place-items: center; width: 1.1rem; height: 1.1rem; margin-top: .1rem; border-radius: 50%; background: var(--error); color: #fff; font-size: .72rem; font-weight: 700; }

.is-invalid input:not([type="radio"]):not([type="checkbox"]),
.is-invalid select,
.is-invalid textarea { border-color: var(--error); background: #fffdfd; }

.grid-2 { display: grid; grid-template-columns: 1fr; gap: 0 1rem; }
@media (min-width: 34rem) { .grid-2 { grid-template-columns: 1fr 1fr; } }

/* Opciones segmentadas */
.segmented { display: flex; flex-wrap: wrap; gap: .5rem; }
.seg { position: relative; flex: 1 1 6.5rem; cursor: pointer; }
.seg input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.seg span {
    display: flex; align-items: center; justify-content: center;
    min-height: 3rem; padding: .6rem .9rem;
    border: 1px solid var(--line-strong); border-radius: var(--radius);
    font-size: .95rem; text-align: center;
    transition: border-color .15s, background .15s, color .15s;
}
.seg:hover span { border-color: #a9a7a0; }
.seg input:checked + span { background: var(--accent); border-color: var(--accent); color: #fff; }
.seg input:focus-visible + span { outline: 3px solid var(--focus); outline-offset: 2px; }
.is-invalid .seg span { border-color: var(--error); }

/* Casillas */
.field > label.checkbox,
.checkbox { display: flex; margin-bottom: 0; gap: .75rem; align-items: flex-start; min-height: 2.75rem; padding: .55rem 0; cursor: pointer; font-size: .95rem; font-weight: 400 !important; }
.checkbox input {
    flex: none;
    width: 1.35rem; height: 1.35rem;
    margin: .1rem 0 0;
    accent-color: var(--accent);
    cursor: pointer;
}
.check { margin-bottom: .75rem; }
.checkbox input:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.check .hint, .check .field-error { margin-left: 2.1rem; }

/* Honeypot */
.hp { position: absolute !important; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

/* ---------- Botones ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: .55rem;
    min-height: 3rem; padding: .7rem 1.25rem;
    border-radius: var(--radius);
    border: 1px solid var(--ink);
    font: 500 .95rem/1.2 var(--sans);
    cursor: pointer; text-decoration: none;
    transition: background .15s, color .15s, opacity .15s;
}
.btn-secondary { background: #fff; color: var(--ink); }
.btn-secondary:hover { background: var(--bg-soft); }
.btn-primary { width: 100%; min-height: 3.4rem; background: var(--accent); border-color: var(--accent); color: #fff; font-size: 1rem; letter-spacing: .02em; }
.btn-primary:hover { opacity: .9; }
.btn[disabled], .btn[aria-disabled="true"] { opacity: .55; cursor: not-allowed; }
input[type="file"]:focus-visible + .btn,
.upload-actions input:focus-visible + label { outline: 3px solid var(--focus); }
.upload-actions label:focus-within { outline: 3px solid var(--focus); outline-offset: 2px; }

.spinner {
    display: none;
    width: 1.1rem; height: 1.1rem;
    border: 2px solid rgba(255,255,255,.35); border-top-color: #fff;
    border-radius: 50%;
    animation: spin .8s linear infinite;
}
.is-loading .spinner { display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation-duration: 2s; } * { transition: none !important; } }

.submit-status { min-height: 1.25rem; margin: .75rem 0 0; font-size: .9rem; color: var(--ink-soft); text-align: center; }
.submit-status.is-error { color: var(--error); font-weight: 500; }

/* ---------- Subidas ---------- */
.photos-instruction { margin: 0 0 .35rem; font-size: .98rem; }
.upload-actions { display: flex; flex-wrap: wrap; gap: .6rem; margin: 1rem 0 .5rem; }
.upload-actions .btn { flex: 1 1 11rem; }
.upload-messages:empty { display: none; }
.upload-messages { margin: .75rem 0 0; }
.upload-msg {
    display: flex; justify-content: space-between; gap: .75rem; align-items: flex-start;
    margin: 0 0 .5rem; padding: .7rem .85rem;
    border-radius: var(--radius);
    background: var(--error-bg); color: var(--error);
    font-size: .88rem;
}
.upload-msg button { flex: none; border: 0; background: none; color: inherit; font: inherit; text-decoration: underline; cursor: pointer; padding: 0; min-height: 1.5rem; }

.previews { list-style: none; margin: 1rem 0 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(9rem, 1fr)); gap: .75rem; }
.preview {
    position: relative;
    border: 1px solid var(--line); border-radius: var(--radius);
    overflow: hidden; background: var(--bg-soft);
}
.preview-img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; background: #eceae5; }
.preview-meta { padding: .5rem .6rem .6rem; font-size: .78rem; line-height: 1.35; }
.preview-name { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--ink); }
.preview-size { color: var(--ink-faint); }
.preview-remove {
    position: absolute; top: .4rem; right: .4rem;
    min-width: 2.75rem; min-height: 2.75rem;
    padding: 0 .7rem;
    border: 0; border-radius: 999px;
    background: rgba(255,255,255,.94); color: var(--ink);
    font: 500 .8rem/1 var(--sans);
    box-shadow: 0 1px 3px rgba(0,0,0,.18);
    cursor: pointer;
}
.preview-remove:hover { background: #fff; color: var(--error); }

/* ---------- Resultado ---------- */
.result { text-align: center; padding: 2rem 0 1rem; border-top: 1px solid var(--line); }
.result:focus { outline: none; }
.result-icon { width: 3.25rem; height: 3.25rem; margin: 0 auto 1.25rem; color: var(--ok); }
.result h2 { margin: 0 0 1rem; font: 400 1.75rem/1.2 var(--serif); }
.result p { color: var(--ink-soft); max-width: 32rem; margin: 0 auto 1rem; }
.result dl {
    display: grid; grid-template-columns: 1fr; gap: .2rem;
    max-width: 26rem; margin: 1.5rem auto; padding: 1.25rem 1.25rem;
    border: 1px solid var(--line); border-radius: var(--radius);
    text-align: left;
}
.result dt { font-size: .75rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-faint); }
.result dd { margin: 0 0 .75rem; font-size: 1rem; overflow-wrap: anywhere; }
.result dd:last-child { margin-bottom: 0; }
.result .ref { font: 600 1.15rem/1.3 ui-monospace, "SF Mono", Menlo, Consolas, monospace; letter-spacing: .04em; }
.result-demo .result-icon { color: #8a6d00; }
.result .btn { margin-top: .5rem; }

/* ---------- Pie ---------- */
.footer { padding: 1.5rem 1rem calc(2rem + env(safe-area-inset-bottom, 0px)); text-align: center; font-size: .75rem; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-faint); border-top: 1px solid var(--line); }
.footer p { margin: 0; }

@media (min-width: 48rem) {
    .page { padding-top: 4rem; }
    .masthead { margin-bottom: 3rem; }
}