/* =====================================================================
   TJ3DPRINTS — Sistema de diseño
   Inspirado en el propio oficio: vista de "slicer" / plano de impresión.
   Fondo grafito, rejilla de cama caliente, acento naranja PLA + cian PETG.
   ===================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
    --bg:        #15171A;
    --bg-alt:    #1B1D21;
    --bg-card:   #202226;
    --line:      #2C2E33;
    --ink:       #ECEAE6;
    --ink-dim:   #9C9890;
    --accent:    #A9532B;   /* terracota / cobre quemado — serio, artesanal */
    --accent-2:  #55707F;   /* azul acero apagado */
    --danger:    #D9605A;
    --ok:        #5FA97C;

    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    --radius: 10px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--font-body);
    line-height: 1.55;
}

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

h1, h2, h3 {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.01em;
    margin: 0 0 .5em;
}

.mono { font-family: var(--font-mono); }

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Foco visible accesible en toda la web */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
    outline: 2px solid var(--accent-2);
    outline-offset: 2px;
}

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

/* ---------------------------------------------------------------------
   Cabecera / navegación
   --------------------------------------------------------------------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(20, 23, 26, 0.86);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand svg { width: 34px; height: 34px; }

.brand-word {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 0.01em;
}

.brand-word span { color: var(--accent); }

.nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    display: inline-block;
    padding: 9px 14px;
    border-radius: 999px;
    font-size: .93rem;
    font-weight: 500;
    color: var(--ink-dim);
    transition: color .15s ease, background .15s ease;
}

.nav-links a:hover { color: var(--ink); background: var(--bg-alt); }
.nav-links a.active { color: var(--ink); background: var(--bg-alt); }

.btn-login {
    border: 1px solid var(--line);
    color: var(--ink) !important;
    background: var(--bg-alt) !important;
}
.btn-login:hover { border-color: var(--accent); }

.nav-toggle {
    display: none;
    background: none;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--ink);
    padding: 8px 10px;
    font-size: 1.1rem;
}

@media (max-width: 760px) {
    .nav-toggle { display: block; }
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0; right: 0;
        flex-direction: column;
        align-items: stretch;
        background: var(--bg-alt);
        border-bottom: 1px solid var(--line);
        padding: 8px 16px 16px;
        display: none;
    }
    .nav-links.open { display: flex; }
    .nav-links a { text-align: center; }
}

/* ---------------------------------------------------------------------
   Hero
   --------------------------------------------------------------------- */
.hero {
    position: relative;
    padding: 96px 0 84px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0 0 auto 0;
    height: 3px;
    background: var(--accent);
    pointer-events: none;
}

.hero-inner {
    position: relative;
    display: grid;
    grid-template-columns: 1.15fr .85fr;
    gap: 56px;
    align-items: center;
}

@media (max-width: 860px) {
    .hero-inner { grid-template-columns: 1fr; }
    .hero { padding: 56px 0 48px; }
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: .78rem;
    color: var(--accent-2);
    text-transform: uppercase;
    letter-spacing: .06em;
    margin-bottom: 22px;
}
.eyebrow .dot {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--accent-2);
    box-shadow: 0 0 0 3px rgba(51,201,192,.18);
}

.hero h1 {
    font-size: clamp(2.6rem, 6vw, 4.2rem);
    line-height: .96;
    margin-bottom: 20px;
}

.hero h1 .accent { color: var(--accent); }

.hero .slogan {
    font-size: 1.15rem;
    color: var(--ink-dim);
    max-width: 46ch;
    margin-bottom: 34px;
}

.hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 40px; }

.chips { display: flex; gap: 10px; flex-wrap: wrap; }
.chip {
    font-family: var(--font-mono);
    font-size: .76rem;
    color: var(--ink-dim);
    border: 1px solid var(--line);
    background: var(--bg-alt);
    padding: 6px 11px;
    border-radius: 8px;
}
.chip b { color: var(--ink); font-weight: 600; }

/* Marca / anillo de capas (elemento firma) */
.mark-stage {
    position: relative;
    aspect-ratio: 1 / 1;
    display: grid;
    place-items: center;
}
.mark-stage svg { width: 88%; height: 88%; }

.mark-ring {
    fill: none;
    stroke: var(--line);
    stroke-width: 1;
}
.mark-ring.build {
    stroke: var(--accent);
    stroke-width: 2.4;
    stroke-linecap: round;
    stroke-dasharray: 900;
    stroke-dashoffset: 900;
    animation: tj3d-draw 2.6s cubic-bezier(.2,.7,.2,1) forwards .2s;
}
.mark-crosshair { stroke: var(--line); stroke-width: 1; }

@keyframes tj3d-draw {
    to { stroke-dashoffset: 0; }
}

/* ---------------------------------------------------------------------
   Botones
   --------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: .92rem;
    padding: 12px 22px;
    border-radius: 8px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform .12s ease, background .15s ease, border-color .15s ease;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary { background: var(--accent); color: #FBF3EC; }
.btn-primary:hover { background: #C06A3C; }

.btn-outline { background: transparent; border-color: var(--line); color: var(--ink); }
.btn-outline:hover { border-color: var(--accent-2); }

.btn-block { width: 100%; justify-content: center; }
.btn[disabled] { opacity: .55; cursor: not-allowed; transform: none; }

/* ---------------------------------------------------------------------
   Secciones generales
   --------------------------------------------------------------------- */
.section { padding: 76px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.section-head { max-width: 60ch; margin-bottom: 44px; }
.section-head .eyebrow { margin-bottom: 14px; }
.section-head h2 { font-size: clamp(1.7rem, 3.4vw, 2.3rem); }
.section-head p { color: var(--ink-dim); }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
@media (max-width: 860px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }

.card {
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 26px;
}

.card h3 { font-size: 1.05rem; margin-bottom: 8px; }
.card p { color: var(--ink-dim); margin: 0; font-size: .93rem; }

.card .num {
    font-family: var(--font-mono);
    color: var(--accent-2);
    font-size: .8rem;
    margin-bottom: 12px;
    display: block;
}

/* Proceso de trabajo (paso a paso — sí es una secuencia real) */
.process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
@media (max-width: 860px) { .process { grid-template-columns: 1fr; } }
.process-step {
    padding: 22px 20px;
    border-left: 1px solid var(--line);
    position: relative;
}
.process-step:first-child { border-left: none; }
.process-step .num { font-family: var(--font-mono); color: var(--accent); font-size: .8rem; }
.process-step h3 { font-size: .98rem; margin: 10px 0 6px; }
.process-step p { color: var(--ink-dim); font-size: .88rem; margin: 0; }

/* ---------------------------------------------------------------------
   Trabajos / galería
   --------------------------------------------------------------------- */
.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 16px;
}
.gallery figure {
    margin: 0;
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
}
.gallery img { aspect-ratio: 1/1; object-fit: cover; width: 100%; }
.gallery figcaption { padding: 12px 14px; font-size: .85rem; color: var(--ink-dim); }
.gallery figcaption strong { color: var(--ink); display: block; font-size: .9rem; margin-bottom: 2px; }

.empty-state {
    border: 1px dashed var(--line);
    border-radius: var(--radius);
    padding: 40px 24px;
    text-align: center;
    color: var(--ink-dim);
}

.ig-follow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-card);
    border: 1px solid var(--line);
    padding: 14px 20px;
    border-radius: var(--radius);
    margin-top: 28px;
}
.ig-follow svg { width: 26px; height: 26px; flex-shrink: 0; }

/* ---------------------------------------------------------------------
   Formularios
   --------------------------------------------------------------------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 640px) { .form-grid { grid-template-columns: 1fr; } }

.field { display: flex; flex-direction: column; gap: 7px; margin-bottom: 18px; }
.field.full { grid-column: 1 / -1; }

label { font-size: .85rem; font-weight: 600; color: var(--ink-dim); }
label .req { color: var(--accent); }

input[type="text"], input[type="email"], input[type="tel"], input[type="password"],
input[type="number"], textarea, select {
    background: var(--bg-card);
    border: 1px solid var(--line);
    color: var(--ink);
    border-radius: 8px;
    padding: 12px 14px;
    font-family: var(--font-body);
    font-size: .95rem;
}
textarea { resize: vertical; min-height: 130px; }

input:focus, textarea:focus, select:focus { border-color: var(--accent-2); }

.hint { font-size: .78rem; color: var(--ink-dim); }

.alert {
    padding: 14px 16px;
    border-radius: 8px;
    font-size: .92rem;
    margin-bottom: 22px;
    border: 1px solid transparent;
}
.alert-ok { background: rgba(76,217,123,.08); border-color: rgba(76,217,123,.35); color: var(--ok); }
.alert-error { background: rgba(255,92,92,.08); border-color: rgba(255,92,92,.35); color: var(--danger); }

/* honeypot anti-spam, oculto a personas, visible a bots simples */
.hp-field { position: absolute; left: -9999px; top: -9999px; }

/* ---------------------------------------------------------------------
   Login / admin
   --------------------------------------------------------------------- */
.auth-shell {
    min-height: calc(100vh - 140px);
    display: grid;
    place-items: center;
    padding: 60px 20px;
}
.auth-card {
    width: 100%;
    max-width: 380px;
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 34px 30px;
}
.auth-card .brand { justify-content: center; margin-bottom: 22px; }

.admin-shell { display: grid; grid-template-columns: 240px 1fr; min-height: calc(100vh - 61px); }
@media (max-width: 860px) { .admin-shell { grid-template-columns: 1fr; } }

.admin-side {
    border-right: 1px solid var(--line);
    background: var(--bg-alt);
    padding: 26px 18px;
}
@media (max-width: 860px) { .admin-side { border-right: none; border-bottom: 1px solid var(--line); } }

.admin-side .who {
    font-family: var(--font-mono);
    font-size: .78rem;
    color: var(--ink-dim);
    padding: 0 10px 16px;
    border-bottom: 1px solid var(--line);
    margin-bottom: 14px;
}
.admin-nav { display: flex; flex-direction: column; gap: 3px; }
.admin-nav a {
    padding: 10px 12px;
    border-radius: 8px;
    font-size: .9rem;
    color: var(--ink-dim);
    font-weight: 500;
}
.admin-nav a:hover { background: var(--bg-card); color: var(--ink); }
.admin-nav a.active { background: var(--bg-card); color: var(--accent-2); }
.admin-nav .logout { margin-top: 14px; border-top: 1px solid var(--line); padding-top: 14px; color: var(--danger); }

.admin-main { padding: 34px 30px; }
.admin-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 26px; flex-wrap: wrap; gap: 10px;}
.admin-head h1 { font-size: 1.5rem; margin: 0; }

/* ---------------------------------------------------------------------
   Calculadora
   --------------------------------------------------------------------- */
.calc-layout { display: grid; grid-template-columns: 1fr 340px; gap: 24px; align-items: start; }
@media (max-width: 940px) { .calc-layout { grid-template-columns: 1fr; } }

.calc-result {
    position: sticky;
    top: 90px;
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 24px;
}
.calc-result h3 { font-size: .95rem; color: var(--ink-dim); font-weight: 600; margin-bottom: 18px; text-transform: uppercase; letter-spacing: .04em; }
.calc-line { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: .86rem; padding: 7px 0; border-bottom: 1px dashed var(--line); }
.calc-line span:last-child { color: var(--ink); }
.calc-total { display: flex; justify-content: space-between; align-items: baseline; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--line); }
.calc-total .amount { font-family: var(--font-display); font-size: 2rem; color: var(--accent); font-weight: 700; }

/* ---------------------------------------------------------------------
   Stock de filamento
   --------------------------------------------------------------------- */
.stock-toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; gap: 12px; flex-wrap: wrap; }

.spool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 16px; }

.spool-card {
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 20px;
    position: relative;
}

.spool-visual { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }

.spool-svg { width: 64px; height: 64px; flex-shrink: 0; }

.spool-meta strong { display: block; font-size: .98rem; }
.spool-meta .tipo { font-family: var(--font-mono); font-size: .74rem; color: var(--ink-dim); }

.spool-bar-track {
    height: 8px;
    border-radius: 999px;
    background: var(--bg-alt);
    overflow: hidden;
    margin: 12px 0 8px;
}
.spool-bar-fill { height: 100%; border-radius: 999px; }

.spool-qty { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: .8rem; color: var(--ink-dim); }
.spool-qty b { color: var(--ink); }

.spool-low { color: var(--danger) !important; }

.spool-actions { display: flex; gap: 8px; margin-top: 16px; }
.spool-actions .btn { padding: 8px 12px; font-size: .8rem; flex: 1; }

.badge-low {
    position: absolute;
    top: 16px; right: 16px;
    background: rgba(255,92,92,.12);
    color: var(--danger);
    border: 1px solid rgba(255,92,92,.3);
    font-size: .68rem;
    font-family: var(--font-mono);
    padding: 3px 8px;
    border-radius: 999px;
}

/* Modal simple sin JS framework */
.modal-backdrop {
    display: none;
    position: fixed; inset: 0;
    background: rgba(10,12,14,.7);
    z-index: 100;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.modal-backdrop.open { display: flex; }
.modal {
    width: 100%; max-width: 460px;
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 26px;
    max-height: 90vh;
    overflow-y: auto;
}
.modal-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.modal-close { background: none; border: none; color: var(--ink-dim); font-size: 1.3rem; cursor: pointer; line-height: 1; }

/* ---------------------------------------------------------------------
   Calculadora — modo único/múltiple y filas de material
   --------------------------------------------------------------------- */
.modo-toggle { display: flex; gap: 18px; margin-top: 4px; flex-wrap: wrap; }
.modo-opcion { display: flex; align-items: center; gap: 7px; font-size: .88rem; font-weight: 500; color: var(--ink); cursor: pointer; }
.modo-opcion input { accent-color: var(--accent); }

.materiales-wrap { display: flex; flex-direction: column; gap: 10px; margin-top: 14px; }

.material-row {
    display: grid;
    grid-template-columns: 1fr 110px 22px 90px auto;
    align-items: center;
    gap: 10px;
}
@media (max-width: 640px) {
    .material-row { grid-template-columns: 1fr 90px 20px; grid-template-areas: "select gramos swatch" "linea linea remove"; }
    .material-row select { grid-area: select; }
    .material-row .mat-gramos { grid-area: gramos; }
    .material-row .mat-swatch { grid-area: swatch; }
    .material-row .mat-linea { grid-area: linea; }
    .material-row .mat-remove { grid-area: remove; justify-self: end; }
}

.mat-swatch {
    width: 20px; height: 20px;
    border-radius: 50%;
    border: 1px solid var(--line);
    background: transparent;
}

.mat-linea { font-size: .85rem; color: var(--ink-dim); text-align: right; white-space: nowrap; }

.btn-sm { padding: 8px 12px; font-size: .8rem; }

/* ---------------------------------------------------------------------
   Badges de material y pastillas de estado (historial de cálculos)
   --------------------------------------------------------------------- */
.badge-material {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: .78rem;
    color: var(--ink-dim);
    background: var(--bg-alt);
    border: 1px solid var(--line);
    padding: 4px 9px;
    border-radius: 999px;
    margin: 2px 4px 2px 0;
}
.badge-swatch {
    width: 10px; height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
    border: 1px solid rgba(255,255,255,.15);
}

.pill {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: .72rem;
    padding: 3px 10px;
    border-radius: 999px;
    border: 1px solid transparent;
    white-space: nowrap;
}
.pill-ok { color: var(--ok); background: rgba(76,217,123,.1); border-color: rgba(76,217,123,.3); }
.pill-pending { color: var(--ink-dim); background: var(--bg-alt); border-color: var(--line); }

/* ---------------------------------------------------------------------
   Tablas
   --------------------------------------------------------------------- */
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); }
th { color: var(--ink-dim); font-weight: 600; font-size: .78rem; text-transform: uppercase; letter-spacing: .03em; }

/* ---------------------------------------------------------------------
   Footer
   --------------------------------------------------------------------- */
.site-footer {
    border-top: 1px solid var(--line);
    padding: 30px 0;
    color: var(--ink-dim);
    font-size: .85rem;
}
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.footer-links { display: flex; gap: 16px; }
.footer-links a:hover { color: var(--ink); }