/* =============================================================================
 * Landing page (/sobre) — lipedema.life
 * SaaS clínico: sóbrio, limpo, tipografia Inter com hierarquia real.
 * Consome tokens de /css/tokens.css (cores, raios, sombras, tipografia).
 * Variáveis locais (--lp-*) cobrem apenas o que os tokens não têm:
 * ritmo de seção, larguras de layout e o fundo escuro da seção científica.
 * ========================================================================== */

:root {
    --lp-section-pad: clamp(72px, 10vw, 120px);
    --lp-max: 1080px;
    --lp-max-narrow: 760px;
    --lp-ink: #0f172a;            /* slate-900 — mesma base dos tokens dark */
    --lp-ink-text: rgba(255, 255, 255, 0.62);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-surface);
    line-height: var(--leading-relaxed);
    -webkit-font-smoothing: antialiased;
}

section { scroll-margin-top: 72px; }

/* =============================================================================
 * Botões (sistema da landing)
 * ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 13px 28px;
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    font-family: inherit;
    font-weight: 600;
    text-decoration: none;
    border: 1.5px solid transparent;
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast),
                border-color var(--transition-fast), box-shadow var(--transition-fast),
                transform var(--transition-fast);
}

.btn:focus-visible {
    outline: none;
    box-shadow: var(--shadow-focus);
}

.btn-lg { padding: 15px 34px; font-size: 17px; }
.btn-sm { padding: 9px 18px; font-size: var(--text-sm); }

.btn-primary {
    background: var(--color-primary);
    color: var(--color-on-primary);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

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

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border-color: var(--color-border-strong);
}

.btn-secondary:hover {
    background: var(--color-surface-alt);
    border-color: var(--color-text-subtle);
    transform: translateY(-1px);
}

/* =============================================================================
 * Marca (mesma do questionário: SVG de pulso + wordmark)
 * ========================================================================== */
.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.brand-mark {
    width: 34px;
    height: 34px;
    flex: none;
    border-radius: 10px;
    box-shadow: var(--shadow-sm);
}

.brand-name {
    font-size: 17px;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--color-text);
}

.brand-tag {
    font-size: var(--text-xs);
    color: var(--color-text-subtle);
    border-left: 1px solid var(--color-border-strong);
    padding-left: 10px;
    margin-left: 2px;
}

/* =============================================================================
 * Nav
 * ========================================================================== */
.site-nav {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.site-nav-inner {
    max-width: var(--lp-max);
    margin: 0 auto;
    padding: 14px var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.site-nav-links {
    display: flex;
    gap: var(--space-6);
    margin-left: auto;
}

.site-nav-links a {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.site-nav-links a:hover { color: var(--color-primary); }

.site-nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.site-nav-links + .site-nav-actions { margin-left: 0; }

.nav-login {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.nav-login:hover { color: var(--color-primary); }

/* =============================================================================
 * Hero
 * ========================================================================== */
.hero {
    position: relative;
    overflow: hidden;
    padding: clamp(72px, 11vw, 128px) var(--space-6) var(--lp-section-pad);
    text-align: center;
    background:
        radial-gradient(52% 42% at 50% 0%, var(--color-primary-soft) 0%, rgba(204, 251, 241, 0) 100%),
        var(--color-surface);
}

.hero-inner {
    max-width: var(--lp-max-narrow);
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--color-surface);
    border: 1px solid var(--color-primary-border);
    color: var(--color-primary-hover);
    padding: 7px 16px;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
    margin-bottom: var(--space-8);
    box-shadow: var(--shadow-sm);
}

.hero-badge svg { width: 15px; height: 15px; }

.hero h1 {
    font-size: clamp(38px, 6vw, 60px);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -0.03em;
    color: var(--color-text);
    margin-bottom: var(--space-5);
}

.hero-hl { color: var(--color-primary); }

.hero-subtitle {
    font-size: clamp(17px, 2vw, var(--text-xl));
    color: var(--color-text-subtle);
    max-width: 600px;
    margin: 0 auto var(--space-10);
    line-height: var(--leading-relaxed);
}

.hero-cta {
    display: flex;
    gap: var(--space-3);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-10);
}

.hero-trust {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-3) var(--space-8);
    list-style: none;
    font-size: var(--text-sm);
    color: var(--color-text-subtle);
}

.hero-trust li {
    display: flex;
    align-items: baseline;
    gap: 6px;
}

.hero-trust strong {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-primary-hover);
}

/* =============================================================================
 * Seções — ritmo e cabeçalhos
 * ========================================================================== */
.section-inner {
    max-width: var(--lp-max);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.features,
.how,
.science,
.subscribe {
    padding-top: var(--lp-section-pad);
    padding-bottom: var(--lp-section-pad);
}

.section-head {
    max-width: var(--lp-max-narrow);
    margin-bottom: clamp(48px, 6vw, 72px);
}

.section-label {
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--space-3);
}

.section-title {
    font-size: clamp(28px, 3.6vw, 40px);
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
    line-height: var(--leading-tight);
    margin-bottom: var(--space-4);
}

.section-desc {
    font-size: 17px;
    color: var(--color-text-subtle);
    max-width: 620px;
    line-height: var(--leading-relaxed);
}

/* =============================================================================
 * Features
 * ========================================================================== */
.features { background: var(--color-surface-alt); }

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
}

.feature-card {
    background: var(--color-surface);
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal),
                transform var(--transition-normal);
}

.feature-card:hover {
    border-color: var(--color-primary-border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-soft);
    color: var(--color-primary-hover);
    margin-bottom: var(--space-5);
    transition: background var(--transition-normal), color var(--transition-normal);
}

.feature-card:hover .feature-icon {
    background: var(--color-primary);
    color: var(--color-on-primary);
}

.feature-icon svg { width: 24px; height: 24px; }

.feature-card h3 {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--color-text);
    letter-spacing: -0.01em;
}

.feature-card p {
    font-size: var(--text-sm);
    color: var(--color-text-subtle);
    line-height: var(--leading-relaxed);
}

/* =============================================================================
 * Como funciona
 * ========================================================================== */
.how { background: var(--color-surface); }

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: var(--space-10) var(--space-8);
    list-style: none;
    counter-reset: step;
}

.step {
    position: relative;
    text-align: center;
    counter-increment: step;
}

.step::before {
    content: counter(step);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    margin: 0 auto var(--space-5);
    border-radius: 50%;
    background: var(--color-surface);
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    font-size: var(--text-xl);
    font-weight: 700;
    box-shadow: var(--shadow-sm);
    position: relative;
    z-index: 1;
}

/* Linha conectora entre os passos (apenas em telas largas) */
@media (min-width: 900px) {
    .step:not(:last-child)::after {
        content: '';
        position: absolute;
        top: 28px;
        left: calc(50% + 40px);
        width: calc(100% - 80px + var(--space-8));
        border-top: 2px dashed var(--color-border-strong);
    }
}

.step h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--color-text);
}

.step p {
    font-size: var(--text-sm);
    color: var(--color-text-subtle);
    line-height: var(--leading-relaxed);
}

/* =============================================================================
 * Base científica (banda escura — credibilidade)
 * ========================================================================== */
.science {
    background: var(--lp-ink);
    color: var(--color-on-primary);
}

.science .section-label { color: var(--color-primary-border); }
.science .section-title { color: var(--color-on-primary); }
.science .section-desc { color: var(--lp-ink-text); }

.science-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--space-8);
}

.stat {
    text-align: center;
    padding: var(--space-6) var(--space-4);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-xl);
}

.stat-value {
    font-size: clamp(32px, 4vw, 44px);
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--color-primary-border);
    line-height: 1.15;
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--lp-ink-text);
    margin-top: 6px;
}

.citation {
    margin-top: var(--space-10);
    padding: var(--space-5) var(--space-6);
    background: rgba(255, 255, 255, 0.05);
    border-left: 3px solid var(--color-primary-border);
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    font-size: var(--text-sm);
    color: var(--lp-ink-text);
    line-height: var(--leading-relaxed);
}

.citation em { color: rgba(255, 255, 255, 0.85); }

.citation a {
    color: var(--color-primary-border);
    text-decoration: none;
    font-weight: 600;
}

.citation a:hover { text-decoration: underline; }

/* =============================================================================
 * CTA final / subscribe (banda teal + card de formulário)
 * ========================================================================== */
.subscribe {
    background: var(--color-primary);
    color: var(--color-on-primary);
}

.subscribe .section-head { text-align: center; margin-inline: auto; }

.subscribe .section-label { color: var(--color-primary-soft); }
.subscribe .section-title { color: var(--color-on-primary); }
.subscribe .section-desc { color: rgba(255, 255, 255, 0.82); margin-inline: auto; }

.subscribe-card {
    max-width: 560px;
    margin: 0 auto;
    background: var(--color-surface);
    color: var(--color-text);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-lg);
    text-align: left;
}

.subscribe-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
}

.subscribe-form .form-group { margin-bottom: var(--space-4); }

.subscribe-form label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
}

.subscribe-form input,
.subscribe-form select {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    font-family: inherit;
    background: var(--color-surface);
    color: var(--color-text);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.subscribe-form input::placeholder { color: var(--color-text-subtle); }

.subscribe-form input:focus,
.subscribe-form select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-focus);
}

.form-error {
    display: block;
    margin-top: 6px;
    font-size: var(--text-xs);
    color: var(--color-error-text);
    font-weight: 600;
}

/* Honeypot anti-spam — invisível para humanos */
.hp-field {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.btn-submit {
    width: 100%;
    padding: 15px 28px;
    font-size: 17px;
    margin-top: var(--space-2);
}

.subscribe-success {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    background: var(--color-success-bg);
    border: 1px solid var(--color-success-border);
    color: var(--color-success-text);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    font-size: var(--text-sm);
    line-height: var(--leading-normal);
}

.subscribe-success svg {
    width: 32px;
    height: 32px;
    flex: none;
}

.subscribe-alt {
    margin-top: var(--space-5);
    text-align: center;
    font-size: var(--text-sm);
    color: var(--color-text-subtle);
}

.subscribe-alt a {
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: none;
}

.subscribe-alt a:hover { text-decoration: underline; }

/* =============================================================================
 * Footer
 * ========================================================================== */
.site-footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
}

.site-footer-inner {
    max-width: var(--lp-max);
    margin: 0 auto;
    padding: clamp(48px, 6vw, 72px) var(--space-6) var(--space-10);
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-10);
}

.footer-brand p {
    margin-top: var(--space-4);
    font-size: var(--text-sm);
    color: var(--color-text-subtle);
    max-width: 320px;
    line-height: var(--leading-relaxed);
}

.footer-col h2 {
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-subtle);
    margin-bottom: var(--space-4);
}

.footer-col a {
    display: block;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    text-decoration: none;
    padding: 5px 0;
    transition: color var(--transition-fast);
}

.footer-col a:hover { color: var(--color-primary); }

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding: var(--space-5) var(--space-6);
    text-align: center;
}

.footer-bottom p {
    font-size: var(--text-xs);
    color: var(--color-text-subtle);
}

/* =============================================================================
 * Responsivo
 * ========================================================================== */
@media (max-width: 900px) {
    .site-nav-links { display: none; }
    .site-nav-actions { margin-left: auto; }
}

@media (max-width: 640px) {
    .site-nav-inner { padding: 12px var(--space-4); gap: var(--space-4); }
    .brand-tag { display: none; }
    .nav-login { display: none; }

    .hero { padding-top: 56px; }

    .hero-cta { flex-direction: column; align-items: stretch; }

    .section-inner { padding: 0 var(--space-4); }

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

    .subscribe-form .form-row { grid-template-columns: 1fr; gap: 0; }

    .subscribe-card { padding: var(--space-6) var(--space-5); }

    .site-footer-inner { grid-template-columns: 1fr; gap: var(--space-8); }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .btn, .feature-card, .feature-icon { transition: none; }
    .btn-primary:hover, .btn-secondary:hover, .feature-card:hover { transform: none; }
}