/* ══════════════════════════════════════════════════
   ABNT — Interface
   Tema: Editorial acadêmico
   ══════════════════════════════════════════════════ */

/* ── Variáveis ──────────────────────────────────────── */
:root {
    --ink:        #1a1a18;
    --ink-light:  #4a4a44;
    --ink-muted:  #8a8a80;
    --paper:      #f5f3ee;
    --paper-dark: #ede9e0;
    --paper-card: #faf9f6;
    --green:      #1e4030;
    --green-mid:  #2d5c45;
    --green-lite: #e8f0eb;
    --accent:     #c8a44a;
    --danger:     #8b2020;
    --danger-bg:  #fdf2f2;
    --warn-bg:    #fdf8ec;
    --warn-border:#d4a843;
    --radius:     6px;
    --radius-lg:  12px;
    --shadow-sm:  0 1px 3px rgba(26,26,24,.08);
    --shadow-md:  0 4px 20px rgba(26,26,24,.10);
    --shadow-lg:  0 12px 48px rgba(26,26,24,.14);
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body:    'Source Serif 4', Georgia, serif;
    --font-mono:    'JetBrains Mono', monospace;
    --transition:   .22s cubic-bezier(.4,0,.2,1);
}

/* ── Reset ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background: var(--paper);
    color: var(--ink);
    line-height: 1.65;
    min-height: 100vh;
    /* Textura sutil de papel */
    background-image:
        radial-gradient(ellipse at 20% 50%, rgba(200,164,74,.04) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 10%, rgba(30,64,48,.04) 0%, transparent 60%);
}

/* ── Layout ─────────────────────────────────────────── */
.container {
    max-width: 780px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ── Cabeçalho ──────────────────────────────────────── */
.site-header {
    border-bottom: 1px solid var(--paper-dark);
    background: var(--paper-card);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    max-width: 780px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: baseline;
    gap: 10px;
}

.logo-abnt {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 900;
    color: var(--green);
    letter-spacing: .04em;
}

.logo-sep {
    color: var(--ink-muted);
    font-size: .9rem;
}

.logo-sub {
    font-family: var(--font-mono);
    font-size: .72rem;
    color: var(--ink-muted);
    letter-spacing: .06em;
    text-transform: uppercase;
}

.header-badge {
    display: flex;
    align-items: center;
    gap: 7px;
    font-family: var(--font-mono);
    font-size: .68rem;
    color: var(--green-mid);
    text-transform: uppercase;
    letter-spacing: .07em;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--green-mid);
    animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%       { opacity: .5; transform: scale(.7); }
}

/* ── Hero ───────────────────────────────────────────── */
.hero {
    padding: 72px 0 0;
}

.hero-inner {
    max-width: 780px;
    margin: 0 auto;
    padding: 0 24px;
}

.hero-eyebrow {
    font-family: var(--font-mono);
    font-size: .72rem;
    color: var(--accent);
    letter-spacing: .12em;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.4rem, 6vw, 3.8rem);
    font-weight: 900;
    line-height: 1.1;
    color: var(--ink);
    margin-bottom: 28px;
}

.hero-title em {
    font-style: italic;
    color: var(--green);
}

.hero-desc {
    font-size: 1.08rem;
    color: var(--ink-light);
    max-width: 480px;
    font-weight: 300;
    margin-bottom: 64px;
}

.hero-rule {
    height: 1px;
    background: linear-gradient(90deg, var(--green) 0%, transparent 100%);
    opacity: .25;
    margin: 0 24px;
}

/* ── Main ───────────────────────────────────────────── */
.main {
    padding: 56px 0 80px;
}

/* ── Blocos do formulário ───────────────────────────── */
.form-block {
    margin-bottom: 40px;
    animation: fadeUp .4s ease both;
}

.form-block + .form-block {
    padding-top: 40px;
    border-top: 1px solid var(--paper-dark);
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

.block-label {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    font-family: var(--font-mono);
    font-size: .78rem;
    font-weight: 500;
    color: var(--ink-muted);
    text-transform: uppercase;
    letter-spacing: .1em;
}

.step-num {
    font-size: .68rem;
    color: var(--paper-card);
    background: var(--green);
    border-radius: 4px;
    padding: 2px 7px;
    letter-spacing: .06em;
}

/* ── Campos de metadados ────────────────────────────── */
.meta-row {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 16px;
}

@media (max-width: 600px) {
    .meta-row { grid-template-columns: 1fr; }
}

.field label {
    display: block;
    font-family: var(--font-mono);
    font-size: .71rem;
    color: var(--ink-light);
    letter-spacing: .06em;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.field input {
    width: 100%;
    padding: 11px 14px;
    border: 1.5px solid var(--paper-dark);
    border-radius: var(--radius);
    background: var(--paper-card);
    font-family: var(--font-body);
    font-size: .95rem;
    color: var(--ink);
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}

.field input:focus {
    border-color: var(--green-mid);
    box-shadow: 0 0 0 3px rgba(30,64,48,.1);
}

.field input::placeholder { color: var(--ink-muted); font-weight: 300; }

.field-hint {
    margin-top: 10px;
    font-size: .8rem;
    color: var(--ink-muted);
    font-style: italic;
    font-weight: 300;
}

/* ── Tabs de modo ───────────────────────────────────── */
.mode-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 20px;
    background: var(--paper-dark);
    border-radius: var(--radius);
    padding: 4px;
    width: fit-content;
}

.mode-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 18px;
    border: none;
    border-radius: 4px;
    background: transparent;
    font-family: var(--font-mono);
    font-size: .75rem;
    font-weight: 500;
    color: var(--ink-muted);
    cursor: pointer;
    transition: all var(--transition);
    letter-spacing: .04em;
}

.mode-tab svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.mode-tab.active {
    background: var(--paper-card);
    color: var(--green);
    box-shadow: var(--shadow-sm);
}

.mode-tab:hover:not(.active) {
    color: var(--ink-light);
}

/* ── Drop zone ──────────────────────────────────────── */
.drop-zone {
    border: 2px dashed var(--paper-dark);
    border-radius: var(--radius-lg);
    background: var(--paper-card);
    padding: 56px 32px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--green-mid);
    background: var(--green-lite);
}

.drop-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    color: var(--ink-muted);
}

.drop-icon svg { width: 100%; height: 100%; }

.drop-title {
    font-family: var(--font-display);
    font-size: 1.15rem;
    color: var(--ink-light);
    margin-bottom: 6px;
}

.drop-sub {
    font-size: .85rem;
    color: var(--ink-muted);
    margin-bottom: 16px;
}

.btn-file {
    display: inline-block;
    padding: 9px 22px;
    background: var(--green);
    color: #fff;
    border-radius: var(--radius);
    font-family: var(--font-mono);
    font-size: .78rem;
    font-weight: 500;
    cursor: pointer;
    letter-spacing: .05em;
    transition: background var(--transition), transform var(--transition);
}

.btn-file:hover {
    background: var(--green-mid);
    transform: translateY(-1px);
}

.drop-formats {
    margin-top: 16px;
    font-family: var(--font-mono);
    font-size: .68rem;
    color: var(--ink-muted);
    letter-spacing: .06em;
    text-transform: uppercase;
}

/* ── Preview de arquivo ─────────────────────────────── */
.file-preview {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    background: var(--green-lite);
    border: 1.5px solid rgba(30,64,48,.2);
    border-radius: var(--radius-lg);
    margin-top: 12px;
}

.file-preview-icon {
    width: 36px;
    height: 36px;
    color: var(--green);
    flex-shrink: 0;
}

.file-preview-icon svg { width: 100%; height: 100%; }

.file-preview-info {
    flex: 1;
    min-width: 0;
}

.file-preview-name {
    display: block;
    font-size: .9rem;
    font-weight: 400;
    color: var(--ink);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-preview-size {
    font-family: var(--font-mono);
    font-size: .72rem;
    color: var(--ink-muted);
}

.file-preview-remove {
    border: none;
    background: none;
    color: var(--ink-muted);
    cursor: pointer;
    font-size: 1rem;
    padding: 4px 8px;
    border-radius: var(--radius);
    transition: all var(--transition);
}

.file-preview-remove:hover {
    background: rgba(139,32,32,.1);
    color: var(--danger);
}

/* ── Textarea ───────────────────────────────────────── */
.textarea-wrap {
    position: relative;
}

.textarea-wrap textarea {
    width: 100%;
    padding: 16px;
    border: 1.5px solid var(--paper-dark);
    border-radius: var(--radius-lg);
    background: var(--paper-card);
    font-family: var(--font-body);
    font-size: .95rem;
    color: var(--ink);
    line-height: 1.7;
    resize: vertical;
    min-height: 240px;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.textarea-wrap textarea:focus {
    border-color: var(--green-mid);
    box-shadow: 0 0 0 3px rgba(30,64,48,.1);
}

.textarea-wrap textarea::placeholder {
    color: var(--ink-muted);
    font-weight: 300;
    font-style: italic;
}

.textarea-counter {
    text-align: right;
    font-family: var(--font-mono);
    font-size: .7rem;
    color: var(--ink-muted);
    margin-top: 8px;
    letter-spacing: .04em;
}

.textarea-counter span { color: var(--ink-light); }

/* ── Alertas ────────────────────────────────────────── */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius);
    font-size: .88rem;
    margin-bottom: 24px;
}

.alert--warn {
    background: var(--warn-bg);
    border: 1px solid var(--warn-border);
    color: #7a5c10;
}

/* ── Botão principal ────────────────────────────────── */
.action-row {
    padding-top: 40px;
    border-top: 1px solid var(--paper-dark);
}

.btn-process {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 36px;
    background: var(--green);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition);
    letter-spacing: .02em;
    box-shadow: 0 4px 16px rgba(30,64,48,.25);
}

.btn-process:hover {
    background: var(--green-mid);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(30,64,48,.3);
}

.btn-process:active {
    transform: translateY(0);
}

.btn-process:disabled {
    opacity: .5;
    cursor: not-allowed;
    transform: none;
}

.btn-arrow {
    width: 20px;
    height: 20px;
    transition: transform var(--transition);
}

.btn-process:hover .btn-arrow {
    transform: translateX(4px);
}

/* ── Overlay de progresso ───────────────────────────── */
.progress-overlay {
    position: fixed;
    inset: 0;
    background: rgba(245,243,238,.88);
    backdrop-filter: blur(8px);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
}

.progress-card {
    background: var(--paper-card);
    border: 1px solid var(--paper-dark);
    border-radius: var(--radius-lg);
    padding: 48px 56px;
    text-align: center;
    box-shadow: var(--shadow-lg);
    max-width: 380px;
    width: 90%;
    animation: fadeUp .3s ease;
}

/* Spinner SVG animado */
.progress-spinner {
    width: 64px;
    height: 64px;
    margin: 0 auto 28px;
}

.progress-spinner svg {
    width: 100%;
    height: 100%;
    animation: rotate 2s linear infinite;
}

.spinner-track {
    fill: none;
    stroke: var(--paper-dark);
    stroke-width: 3;
}

.spinner-fill {
    fill: none;
    stroke: var(--green);
    stroke-width: 3;
    stroke-linecap: round;
    stroke-dasharray: 80 126;
    animation: dash 1.8s ease-in-out infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

@keyframes dash {
    0%   { stroke-dasharray: 10 126; stroke-dashoffset: 0; }
    50%  { stroke-dasharray: 90 126; stroke-dashoffset: -40; }
    100% { stroke-dasharray: 10 126; stroke-dashoffset: -126; }
}

.progress-step {
    font-family: var(--font-display);
    font-size: 1.05rem;
    color: var(--ink);
    margin-bottom: 28px;
    min-height: 1.5em;
}

.progress-steps-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    text-align: left;
}

.pstep {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: .72rem;
    color: var(--ink-muted);
    letter-spacing: .04em;
    transition: all var(--transition);
}

.pstep-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--paper-dark);
    flex-shrink: 0;
    transition: all var(--transition);
}

.pstep.active {
    color: var(--green);
}

.pstep.active .pstep-dot {
    background: var(--green);
    box-shadow: 0 0 0 3px rgba(30,64,48,.2);
    animation: pulse 1.2s ease-in-out infinite;
}

.pstep.done {
    color: var(--ink-light);
}

.pstep.done .pstep-dot {
    background: var(--accent);
}

/* ── Resultado ──────────────────────────────────────── */
.result-section {
    padding: 0 0 80px;
    animation: fadeUp .5s ease;
}

.result-card {
    background: var(--paper-card);
    border: 1.5px solid rgba(30,64,48,.2);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-md);
}

.result-header {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--paper-dark);
}

.result-check {
    width: 48px;
    height: 48px;
    background: var(--green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: #fff;
    animation: checkPop .4s cubic-bezier(.34,1.56,.64,1);
}

@keyframes checkPop {
    from { transform: scale(0); opacity: 0; }
    to   { transform: scale(1); opacity: 1; }
}

.result-check svg { width: 22px; height: 22px; }

.result-title {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 4px;
}

.result-meta {
    font-family: var(--font-mono);
    font-size: .72rem;
    color: var(--ink-muted);
    letter-spacing: .05em;
    text-transform: uppercase;
}

.result-downloads {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 28px;
}

@media (max-width: 500px) {
    .result-downloads { grid-template-columns: 1fr; }
}

.btn-download {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 22px;
    border-radius: var(--radius);
    text-decoration: none;
    transition: all var(--transition);
    border: 1.5px solid transparent;
}

.btn-download--docx {
    background: var(--green-lite);
    border-color: rgba(30,64,48,.2);
    color: var(--green);
}

.btn-download--pdf {
    background: #fdf8ec;
    border-color: rgba(200,164,74,.3);
    color: #7a5c10;
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.dl-icon {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
}

.dl-icon svg { width: 100%; height: 100%; }

.dl-info strong {
    display: block;
    font-family: var(--font-mono);
    font-size: .82rem;
    font-weight: 500;
    letter-spacing: .04em;
}

.dl-info small {
    font-size: .72rem;
    opacity: .7;
    font-family: var(--font-mono);
    font-weight: 400;
}

.btn-reset {
    border: none;
    background: none;
    font-family: var(--font-mono);
    font-size: .75rem;
    color: var(--ink-muted);
    cursor: pointer;
    letter-spacing: .05em;
    text-transform: uppercase;
    padding: 6px 0;
    transition: color var(--transition);
}

.btn-reset:hover { color: var(--ink); }

/* ── Toast de erro ──────────────────────────────────── */
.error-toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--danger);
    color: #fff;
    padding: 14px 20px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: .88rem;
    font-family: var(--font-mono);
    box-shadow: var(--shadow-lg);
    z-index: 300;
    max-width: 90vw;
    animation: toastIn .3s cubic-bezier(.34,1.56,.64,1);
}

@keyframes toastIn {
    from { opacity: 0; transform: translateX(-50%) translateY(20px); }
    to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.error-toast svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    opacity: .8;
}

.error-toast #errorClose {
    border: none;
    background: rgba(255,255,255,.2);
    color: #fff;
    cursor: pointer;
    border-radius: 4px;
    padding: 2px 8px;
    font-size: .85rem;
    margin-left: 8px;
}

/* ── Rodapé ─────────────────────────────────────────── */
.site-footer {
    border-top: 1px solid var(--paper-dark);
    padding: 24px 0;
    margin-top: auto;
}

.footer-inner {
    max-width: 780px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-mono);
    font-size: .7rem;
    color: var(--ink-muted);
    letter-spacing: .06em;
    text-transform: uppercase;
}

@media (max-width: 500px) {
    .footer-inner { flex-direction: column; gap: 8px; text-align: center; }
}

/* ── Utilitários ────────────────────────────────────── */
[hidden] { display: none !important; }