/* ============================================================
   DESIGN SYSTEM — CSS Custom Properties (Tokens)
   ============================================================ */
:root {
    /* ── Cores ── */
    --color-black:         #09090b;
    --color-surface:       #141419;
    --color-surface-raised:#1c1c23;
    --color-border:        #27272a;
    --color-text-primary:  #fafafa;
    --color-text-body:     #e4e4e7;
    --color-text-muted:    #71717a;

    --color-brand:         #22c55e;
    --color-brand-hover:   #16a34a;
    --color-brand-glow:    rgba(34, 197, 94, 0.20);
    --color-brand-dim:     rgba(34, 197, 94, 0.08);

    --color-code:          #34d399;
    --color-error:         #ef4444;
    --color-error-bg:      rgba(239, 68, 68, 0.08);

    /* ── Tipografia ── */
    --font-family-base:    'Inter', sans-serif;
    --font-family-mono:    'Fira Code', 'Cascadia Code', 'Courier New', monospace;

    --font-size-xs:        12px;
    --font-size-sm:        13px;
    --font-size-base:      16px;
    --font-size-lg:        18px;
    --font-size-xl:        20px;
    --font-size-2xl:       24px;
    --font-size-4xl:       40px;

    --font-weight-regular:  400;
    --font-weight-medium:   500;
    --font-weight-semibold: 600;
    --font-weight-bold:     700;

    --line-height-tight:   1.25;
    --line-height-normal:  1.5;
    --line-height-relaxed: 1.8;
    --line-height-code:    1.9;

    /* ── Espaçamento ── */
    --space-1:  4px;
    --space-2:  8px;
    --space-3:  12px;
    --space-4:  16px;
    --space-5:  20px;
    --space-6:  24px;
    --space-8:  32px;
    --space-10: 40px;
    --space-12: 48px;

    /* ── Bordas ── */
    --border:      1px solid var(--color-border);
    --radius-sm:   6px;
    --radius-md:   10px;
    --radius-lg:   14px;
    --radius-xl:   18px;

    /* ── Sombras ── */
    --shadow-sm:   0 1px 3px rgba(0,0,0,0.35);
    --shadow-md:   0 4px 16px rgba(0,0,0,0.45);
    --shadow-glow: 0 0 24px var(--color-brand-glow);

    /* ── Animações ── */
    --duration-fast:   150ms;
    --duration-normal: 250ms;
    --duration-slow:   500ms;
    --ease:            cubic-bezier(0.4, 0, 0.2, 1);
    --ease-spring:     cubic-bezier(0.34, 1.56, 0.64, 1);

    /* ── Layout ── */
    --max-width-form:    640px;
    --max-width-content: 1240px;
    --output-min-height: 400px;
}

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

/* ============================================================
   BASE
   ============================================================ */
html {
    scroll-behavior: smooth;
}

body {
    background: var(--color-black);
    color: var(--color-text-body);
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* ============================================================
   BACKGROUND ANIMADO
   ============================================================ */
.bg-orbs {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 9999px;
    filter: blur(80px);
    opacity: 0.55;
    will-change: transform;
}

.orb-1 {
    width: 520px;
    height: 520px;
    background: radial-gradient(circle, rgba(34,197,94,0.4), transparent 70%);
    top: -180px;
    left: -140px;
    animation: orbFloat1 14s ease-in-out infinite;
}

.orb-2 {
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(59,130,246,0.3), transparent 70%);
    bottom: -120px;
    right: -100px;
    animation: orbFloat2 18s ease-in-out infinite;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(168,85,247,0.25), transparent 70%);
    top: 40%;
    left: 55%;
    animation: orbFloat3 22s ease-in-out infinite;
}

@keyframes orbFloat1 {
    0%, 100% { transform: translate(0px, 0px) scale(1); }
    33%       { transform: translate(60px, 40px) scale(1.08); }
    66%       { transform: translate(-30px, 70px) scale(0.95); }
}

@keyframes orbFloat2 {
    0%, 100% { transform: translate(0px, 0px) scale(1); }
    40%       { transform: translate(-70px, -50px) scale(1.1); }
    70%       { transform: translate(40px, -30px) scale(0.92); }
}

@keyframes orbFloat3 {
    0%, 100% { transform: translate(0px, 0px) scale(1); }
    50%       { transform: translate(-80px, 50px) scale(1.15); }
}

/* Grid pattern */
.bg-grid {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background-image:
        linear-gradient(var(--color-border) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
    background-size: 44px 44px;
    opacity: 0.18;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
    position: relative;
    z-index: 1;
    max-width: var(--max-width-content);
    margin: 0 auto;
    padding: var(--space-10) var(--space-6);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-8);
}

/* ============================================================
   HEADER
   ============================================================ */
.header {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    animation: fadeInDown var(--duration-slow) var(--ease) both;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--color-brand-dim);
    border: 1px solid rgba(34, 197, 94, 0.25);
    color: var(--color-brand);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: var(--space-1) var(--space-3);
    border-radius: 9999px;
}

h1 {
    font-size: clamp(28px, 5vw, var(--font-size-4xl));
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    line-height: var(--line-height-tight);
    letter-spacing: -0.02em;
}

h1 span {
    background: linear-gradient(135deg, var(--color-brand) 0%, #6ee7b7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header > p {
    color: var(--color-text-muted);
    font-size: var(--font-size-lg);
    margin: 0;
}

/* ============================================================
   FORMULÁRIO
   ============================================================ */
.form-section {
    width: 100%;
    max-width: var(--max-width-form);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    animation: fadeInUp var(--duration-slow) var(--ease) 100ms both;
}

.caixa-texto {
    resize: none;
    width: 100%;
    padding: var(--space-4);
    border: var(--border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    color: var(--color-text-primary);
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    outline: none;
    transition:
        border-color var(--duration-normal) var(--ease),
        box-shadow var(--duration-normal) var(--ease);
}

.caixa-texto::placeholder {
    color: var(--color-text-muted);
}

.caixa-texto:focus {
    border-color: var(--color-brand);
    box-shadow: 0 0 0 3px var(--color-brand-dim);
}

.form-actions {
    display: flex;
    gap: var(--space-3);
}

/* ============================================================
   BOTÃO PRINCIPAL
   ============================================================ */
.botao-gerar {
    flex: 1;
    background: var(--color-brand);
    color: #000;
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-bold);
    border: none;
    border-radius: var(--radius-md);
    padding: var(--space-4) var(--space-5);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    position: relative;
    overflow: hidden;
    transition:
        background var(--duration-normal) var(--ease),
        box-shadow var(--duration-normal) var(--ease),
        transform var(--duration-fast) var(--ease);
}

.botao-gerar::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.12) 0%, transparent 60%);
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease);
}

.botao-gerar:hover {
    background: var(--color-brand-hover);
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
}

.botao-gerar:hover::before {
    opacity: 1;
}

.botao-gerar:active {
    transform: translateY(0px);
}

.botao-gerar:focus-visible {
    outline: 2px solid var(--color-brand);
    outline-offset: 3px;
}

/* Estados do botão */
.btn-loading {
    display: none;
    align-items: center;
    gap: var(--space-2);
}

.botao-gerar.carregando .btn-text   { display: none; }
.botao-gerar.carregando .btn-loading { display: flex; }
.botao-gerar.carregando {
    background: var(--color-brand-hover);
    cursor: not-allowed;
    opacity: 0.85;
    transform: none;
}

/* Spinner */
.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(0,0,0,0.25);
    border-top-color: #000;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

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

/* ============================================================
   MENSAGEM DE ERRO
   ============================================================ */
.mensagem-erro {
    width: 100%;
    max-width: var(--max-width-form);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    background: var(--color-error-bg);
    border: 1px solid var(--color-error);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    color: var(--color-error);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    animation: fadeInUp var(--duration-normal) var(--ease) both;
}

.mensagem-erro[hidden] { display: none; }

/* ============================================================
   OUTPUT — GRID LADO A LADO
   ============================================================ */
.output-section {
    width: 100%;
    animation: fadeInUp var(--duration-slow) var(--ease) both;
}

.output-section[hidden] { display: none; }

.output-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-5);
    align-items: stretch;
}

/* Card container */
.output-card {
    display: flex;
    flex-direction: column;
    background: var(--color-surface);
    border: var(--border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    min-height: var(--output-min-height);
    transition: box-shadow var(--duration-normal) var(--ease);
}

.output-card:hover {
    box-shadow: var(--shadow-md), 0 0 0 1px rgba(255,255,255,0.05);
}

/* Header do card */
.output-card-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-bottom: var(--border);
    background: var(--color-surface-raised);
    flex-shrink: 0;
}

.output-dots {
    display: flex;
    gap: 6px;
    flex-shrink: 0;
}

.output-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-border);
}

.output-dots span:nth-child(1) { background: #ef4444; }
.output-dots span:nth-child(2) { background: #f59e0b; }
.output-dots span:nth-child(3) { background: #22c55e; }

.output-card-title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-muted);
    letter-spacing: 0.02em;
    text-transform: uppercase;
    flex: 1;
}

/* Badge "live" */
.preview-badge {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-brand);
    background: var(--color-brand-dim);
    border: 1px solid rgba(34,197,94,0.25);
    border-radius: 9999px;
    padding: 2px var(--space-2);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0.5; }
}

/* ============================================================
   BOTÃO COPIAR
   ============================================================ */
.botao-copiar {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    background: transparent;
    border: var(--border);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    font-family: var(--font-family-base);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    padding: var(--space-1) var(--space-2);
    cursor: pointer;
    transition:
        color var(--duration-fast) var(--ease),
        border-color var(--duration-fast) var(--ease),
        background var(--duration-fast) var(--ease);
}

.botao-copiar:hover {
    color: var(--color-brand);
    border-color: var(--color-brand);
    background: var(--color-brand-dim);
}

.botao-copiar.copiado {
    color: var(--color-brand);
    border-color: var(--color-brand);
}

/* ============================================================
   BLOCO DE CÓDIGO
   ============================================================ */
.bloco-codigo {
    flex: 1;
    padding: var(--space-4);
    font-family: var(--font-family-mono);
    font-size: var(--font-size-sm);
    color: var(--color-code);
    line-height: var(--line-height-code);
    overflow: auto;
    white-space: pre-wrap;
    word-break: break-all;
}

/* ============================================================
   IFRAME PREVIEW
   ============================================================ */
.resultado-codigo {
    flex: 1;
    width: 100%;
    border: none;
    background: #fff;
    display: block;
}

/* ============================================================
   ANIMAÇÕES DE ENTRADA
   ============================================================ */
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   RESPONSIVO
   ============================================================ */
@media (max-width: 768px) {
    .container {
        padding: var(--space-6) var(--space-4);
        gap: var(--space-6);
    }

    .output-grid {
        grid-template-columns: 1fr;
    }

    .output-card {
        min-height: 300px;
    }
}