/* ==========================================
   ZeroTeclas Landing — Estilos globales
   ========================================== */

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

:root {
    --bg:         #f8fafc;
    --surface:    #ffffff;
    --surface-2:  #f1f5f9;
    --surface-3:  #e8edf5;
    --border:     #e2e8f0;
    --border-2:   #cbd5e1;
    --border-3:   #94a3b8;
    --text:       #0f172a;
    --text-2:     #475569;
    --text-3:     #94a3b8;
    --green:      #16a34a;
    --green-dim:  #15803d;
    --green-bg:   rgba(22,163,74,0.08);
    --orange:     #ea580c;
    --red:        #dc2626;
    --radius:     10px;
    --radius-lg:  16px;
    --font:       'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --mono:       'JetBrains Mono', 'Fira Code', monospace;
}

html { scroll-behavior: smooth; }

/* Skip link de accesibilidad (WCAG 2.4.1) */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--green);
    color: #fff;
    padding: 8px 16px;
    z-index: 9999;
    font-weight: 600;
    border-radius: 0 0 8px 0;
    text-decoration: none;
    transition: top 0.2s;
}
.skip-link:focus { top: 0; outline: 2px solid #fff; outline-offset: -4px; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    letter-spacing: -0.01em;
    overflow-x: hidden;
}

a { color: var(--green); text-decoration: none; }

/* ─── Particle Canvas ─────────────────────────── */
#particleCanvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.12;
}

.page-wrapper {
    position: relative;
    z-index: 1;
}

/* ─── Navbar ──────────────────────────────────── */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    padding: 0 32px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(248,250,252,0.72);
    backdrop-filter: blur(32px) saturate(1.4);
    -webkit-backdrop-filter: blur(32px) saturate(1.4);
    border-bottom: 1px solid rgba(226,232,240,0.6);
}

.nav-brand {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.6px;
}
.nav-brand .g { color: var(--green); }

.nav-center {
    display: flex;
    align-items: center;
    gap: 4px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 50px;
    padding: 4px;
}
.nav-center a {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-2);
    padding: 7px 16px;
    border-radius: 50px;
    transition: all 0.25s;
    text-decoration: none;
}
.nav-center a:hover { color: var(--text); background: var(--surface); box-shadow: 0 1px 4px rgba(0,0,0,0.06); }

.nav-right { display: flex; align-items: center; gap: 12px; }

.btn-nav {
    padding: 9px 22px;
    font-size: 0.82rem;
    font-weight: 600;
    color: #fff;
    background: var(--text);
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.25s;
    text-decoration: none;
    letter-spacing: -0.01em;
}
.btn-nav:hover { background: var(--green); color: #000; transform: translateY(-1px); }

.nav-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    cursor: pointer;
    background: none;
    border: none;
}
.nav-hamburger span {
    width: 20px; height: 2px;
    background: var(--text);
    border-radius: 1px;
    transition: all 0.3s;
}

.nav-mobile-overlay {
    display: none;
    position: fixed;
    inset: 0;
    top: 64px;
    background: rgba(248,250,252,0.96);
    backdrop-filter: blur(24px);
    z-index: 99;
    flex-direction: column;
    align-items: center;
    padding-top: 40px;
    gap: 24px;
}
.nav-mobile-overlay.open { display: flex; }
.nav-mobile-overlay a {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
    text-decoration: none;
}

/* ─── Hero ────────────────────────────────────── */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 48px;
    padding: 120px 48px 80px;
    max-width: 1320px;
    margin: 0 auto;
}

.hero-left { text-align: left; }

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--green);
    background: var(--green-bg);
    border: 1px solid rgba(34,197,94,0.15);
    border-radius: 50px;
    margin-bottom: 28px;
    font-family: var(--mono);
}
.hero-badge .dot {
    width: 6px; height: 6px;
    background: var(--green);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.hero h1 {
    font-size: clamp(2.4rem, 5vw, 3.8rem);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -2px;
    margin-bottom: 20px;
}
.hero h1 .g { color: var(--green); }

.hero-sub {
    font-size: 1.1rem;
    color: var(--text-2);
    max-width: 480px;
    line-height: 1.6;
    margin-bottom: 36px;
}

.hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

.btn-primary {
    padding: 14px 32px;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font);
    color: #000;
    background: var(--green);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}
.btn-primary:hover { opacity: 0.85; color: #000; transform: translateY(-1px); }

.btn-ghost {
    padding: 14px 32px;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font);
    color: var(--text);
    background: transparent;
    border: 1px solid var(--border-2);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}
.btn-ghost:hover { border-color: var(--border-3); color: var(--text); }

/* ─── Trusted bar ─────────────────────────────── */
.trusted-bar {
    margin-top: 60px;
    text-align: center;
}
.trusted-bar p {
    font-size: 0.72rem;
    color: var(--text-3);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 16px;
}
.trusted-logos {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 36px;
    opacity: 0.5;
}
.trusted-logos span {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-2);
    letter-spacing: 1px;
}

/* ─── Section base ────────────────────────────── */
.section {
    padding: 100px 24px;
    max-width: 1100px;
    margin: 0 auto;
}
.section-label {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--green);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 12px;
    font-family: var(--mono);
}
.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 16px;
}
.section-desc {
    font-size: 1rem;
    color: var(--text-2);
    max-width: 550px;
    line-height: 1.6;
    margin-bottom: 56px;
}
.section-note {
    font-size: 0.78rem;
    color: var(--text-3);
    margin-top: 20px;
    font-family: var(--mono);
}

/* ─── How it Works ────────────────────────────── */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}
.step-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: border-color 0.3s, box-shadow 0.3s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 4px 16px rgba(0,0,0,0.04);
}
.step-card:hover { border-color: var(--border-2); box-shadow: 0 4px 12px rgba(0,0,0,0.09), 0 12px 32px rgba(0,0,0,0.06); }

.step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px; height: 36px;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--green);
    background: var(--green-bg);
    border-radius: 10px;
    margin-bottom: 20px;
    font-family: var(--mono);
}
.step-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 8px;
}
.step-card p {
    font-size: 0.88rem;
    color: var(--text-2);
    line-height: 1.55;
}

/* ─── Video Showcase ─────────────────────────── */
.video-showcase {
    margin-top: 56px;
}
.video-frame {
    width: 100%;
    max-width: 860px;
    margin: 0 auto;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-2);
    box-shadow: 0 4px 24px rgba(0,0,0,0.10), 0 1px 4px rgba(0,0,0,0.06);
    background: #111;
}
.video-chrome {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    background: var(--surface-2);
    border-bottom: 1px solid var(--border);
}
.video-chrome-dots { display: flex; gap: 6px; flex-shrink: 0; }
.dot { display: block; width: 11px; height: 11px; border-radius: 50%; }
.dot-red    { background: #ff5f57; }
.dot-yellow { background: #febc2e; }
.dot-green  { background: #28c840; }
.video-chrome-title {
    flex: 1;
    text-align: center;
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--text-3);
    font-family: var(--mono);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.video-chrome-spacer { width: 52px; flex-shrink: 0; }
.video-frame video {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #111;
}
.video-meta {
    margin-top: 14px;
    text-align: center;
    font-size: 0.76rem;
    color: var(--text-3);
    font-family: var(--mono);
}
.video-badge {
    display: inline-block;
    padding: 1px 7px;
    background: var(--green-bg);
    color: var(--green);
    border: 1px solid rgba(22,163,74,0.25);
    border-radius: 5px;
    font-size: 0.67rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    margin-right: 6px;
}

/* ─── Features Grid ───────────────────────────── */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}
.feature-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    display: flex;
    gap: 16px;
    transition: border-color 0.3s, box-shadow 0.3s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 4px 16px rgba(0,0,0,0.04);
}
.feature-card:hover { border-color: var(--border-2); box-shadow: 0 4px 12px rgba(0,0,0,0.09), 0 12px 32px rgba(0,0,0,0.06); }

.feature-icon {
    width: 42px; height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--green-bg);
    border-radius: 12px;
    flex-shrink: 0;
}
.feature-icon svg {
    width: 20px; height: 20px;
    stroke: var(--green);
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.feature-text h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 6px;
}
.feature-text p {
    font-size: 0.84rem;
    color: var(--text-2);
    line-height: 1.5;
}

/* ─── Pricing ─────────────────────────────────── */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    align-items: start;
}
.price-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    position: relative;
    transition: border-color 0.3s, box-shadow 0.3s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 4px 16px rgba(0,0,0,0.04);
}
.price-card:hover { border-color: var(--border-2); box-shadow: 0 4px 12px rgba(0,0,0,0.09), 0 12px 32px rgba(0,0,0,0.06); }
.price-card.featured {
    border-color: var(--green);
    background: rgba(22,163,74,0.03);
    box-shadow: 0 4px 20px rgba(22,163,74,0.12), 0 1px 3px rgba(0,0,0,0.06);
}
.price-card.featured::before {
    content: 'Popular';
    position: absolute;
    top: -10px; right: 20px;
    padding: 4px 12px;
    font-size: 0.68rem;
    font-weight: 600;
    color: #000;
    background: var(--green);
    border-radius: 6px;
}
.price-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-2);
    margin-bottom: 8px;
}
.price-amount {
    font-size: 2.8rem;
    font-weight: 800;
    letter-spacing: -2px;
    margin-bottom: 4px;
}
.price-amount span {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-3);
}
.price-desc {
    font-size: 0.82rem;
    color: var(--text-3);
    margin-bottom: 24px;
}
.price-features {
    list-style: none;
    margin-bottom: 28px;
}
.price-features li {
    font-size: 0.85rem;
    color: var(--text-2);
    padding: 6px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}
.price-features li::before {
    content: '✓';
    color: var(--green);
    font-weight: 700;
    font-size: 0.75rem;
}
.btn-price {
    width: 100%;
    padding: 12px;
    font-size: 0.88rem;
    font-weight: 600;
    font-family: var(--font);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
    display: block;
    text-decoration: none;
}
.btn-price-primary {
    color: #000;
    background: var(--green);
    border: none;
}
.btn-price-primary:hover { opacity: 0.85; color: #000; }
.btn-price-ghost {
    color: var(--text);
    background: transparent;
    border: 1px solid var(--border-2);
}
.btn-price-ghost:hover { border-color: var(--border-3); color: var(--text); }

/* ─── Privacy Section ─────────────────────────── */
.privacy-banner {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    display: flex;
    align-items: center;
    gap: 32px;
    max-width: 900px;
    margin: 0 auto 100px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 4px 20px rgba(0,0,0,0.05);
}
.privacy-icon {
    width: 64px; height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--green-bg);
    border-radius: 16px;
    flex-shrink: 0;
}
.privacy-icon svg {
    width: 28px; height: 28px;
    stroke: var(--green);
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.privacy-content h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.privacy-content p {
    font-size: 0.9rem;
    color: var(--text-2);
    line-height: 1.6;
}

/* ─── CTA ─────────────────────────────────────── */
.cta-section {
    text-align: center;
    padding: 80px 24px 80px;
}
.cta-section h2 {
    font-size: 2.4rem;
    font-weight: 800;
    letter-spacing: -1.5px;
    margin-bottom: 16px;
}
.cta-section h2 .g { color: var(--green); }
.cta-section p {
    font-size: 1rem;
    color: var(--text-2);
    margin-bottom: 32px;
}

/* ─── Contact Section ─────────────────────────── */
.contact-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 32px;
    align-items: start;
}
.contact-info-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 20px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 4px 16px rgba(0,0,0,0.04);
}
.contact-info-icon {
    width: 40px; height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--green-bg);
    border-radius: 10px;
    flex-shrink: 0;
}
.contact-info-icon svg {
    width: 18px; height: 18px;
    stroke: var(--green);
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.contact-info-text strong {
    display: block;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-3);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
    font-family: var(--mono);
}
.contact-info-text a,
.contact-info-text span {
    font-size: 0.88rem;
    color: var(--text);
    font-weight: 500;
}
.contact-info-text a:hover { color: var(--green); }

.contact-form {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 4px 16px rgba(0,0,0,0.04);
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.form-group label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-2);
    letter-spacing: -0.01em;
}
.form-group input,
.form-group select,
.form-group textarea {
    font-family: var(--font);
    font-size: 0.9rem;
    color: var(--text);
    background: var(--bg);
    border: 1px solid var(--border-2);
    border-radius: var(--radius);
    padding: 10px 14px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    -webkit-appearance: none;
    appearance: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--green);
    box-shadow: 0 0 0 3px rgba(22,163,74,0.1);
}
.form-group select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%2394a3b8' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 10px center;
    background-repeat: no-repeat;
    background-size: 16px;
    padding-right: 36px;
    cursor: pointer;
}
.form-group textarea {
    resize: vertical;
    min-height: 130px;
    line-height: 1.5;
}

.captcha-group {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}
.captcha-question {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text);
    font-family: var(--mono);
    flex: 1;
    min-width: 200px;
}
.captcha-group input {
    width: 90px;
    text-align: center;
    font-family: var(--mono);
    font-weight: 700;
    font-size: 1rem;
    border: 1.5px solid var(--border-2);
    border-radius: var(--radius);
    padding: 8px 12px;
    outline: none;
    background: var(--surface);
    transition: border-color 0.2s, box-shadow 0.2s;
}
.captcha-group input:focus {
    border-color: var(--green);
    box-shadow: 0 0 0 3px rgba(22,163,74,0.1);
}

.btn-contact-submit {
    width: 100%;
    padding: 14px;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 10px;
}
.btn-contact-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}
.contact-feedback {
    display: none;
    padding: 14px 18px;
    border-radius: var(--radius);
    font-size: 0.88rem;
    font-weight: 500;
    align-items: center;
    gap: 10px;
    line-height: 1.4;
}
.contact-feedback.success {
    display: flex;
    background: #f0fdf4;
    border: 1px solid rgba(22,163,74,0.3);
    color: #166534;
}
.contact-feedback.error {
    display: flex;
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: var(--red);
}
.contact-feedback svg {
    width: 18px; height: 18px;
    flex-shrink: 0;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* ─── FAQ ─────────────────────────────────────── */
.faq-list {
    max-width: 720px;
    display: flex;
    flex-direction: column;
    gap: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.faq-item {
    border-bottom: 1px solid var(--border);
}
.faq-item:last-child { border-bottom: none; }
.faq-q {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 22px 28px;
    font-family: var(--font);
    font-size: 0.97rem;
    font-weight: 600;
    color: var(--text);
    background: var(--surface);
    border: none;
    cursor: pointer;
    text-align: left;
    transition: background 0.2s;
}
.faq-q:hover { background: var(--surface-2); }
.faq-q[aria-expanded="true"] { background: var(--surface-2); color: var(--green); }
.faq-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    stroke: currentColor;
    fill: none;
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: transform 0.25s;
}
.faq-q[aria-expanded="true"] .faq-icon { transform: rotate(180deg); }
.faq-a {
    display: none;
    padding: 0 28px 22px;
    background: var(--surface-2);
}
.faq-a.open { display: block; }
.faq-a p {
    font-size: 0.9rem;
    color: var(--text-2);
    line-height: 1.7;
}
.faq-a a { color: var(--green); }

/* ─── Footer ──────────────────────────────────── */
.footer {
    border-top: 1px solid var(--border);
    padding: 40px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1100px;
    margin: 0 auto;
}
.footer-brand {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-3);
}
.footer-brand .g { color: var(--green-dim); }
.footer-copy {
    font-size: 0.75rem;
    color: var(--text-3);
}
.footer-links {
    display: flex;
    gap: 20px;
    list-style: none;
}
.footer-links a {
    font-size: 0.78rem;
    color: var(--text-3);
    transition: color 0.2s;
}
.footer-links a:hover { color: var(--text-2); }

/* ─── Calculator ──────────────────────────────── */
.calc-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 28px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 16px 48px rgba(0,0,0,0.07);
    position: relative;
    overflow: hidden;
}
.calc-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--green), #16a34a88, var(--green));
    background-size: 200% 100%;
    animation: calcShimmer 3s ease-in-out infinite;
}
@keyframes calcShimmer {
    0%,100% { background-position: 200% 0; }
    50% { background-position: 0 0; }
}
.calc-inputs { display: grid; gap: 20px; margin-bottom: 24px; }
.calc-field { position: relative; }
.calc-label {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 8px; font-size: 0.8rem; color: var(--text-2);
}
.calc-label strong {
    font-size: 0.95rem; color: var(--text); font-family: var(--mono);
    background: var(--green-bg); padding: 3px 10px; border-radius: 6px;
    min-width: 60px; text-align: center;
}
.calc-slider-wrap { position: relative; }
.calc-slider {
    width: 100%; -webkit-appearance: none; appearance: none; height: 5px;
    background: linear-gradient(90deg, var(--green), var(--green)) left / var(--fill,0%) 100% no-repeat, var(--surface-2);
    border-radius: 3px; outline: none; cursor: pointer;
    border: 1px solid var(--border);
}
.calc-slider::-webkit-slider-thumb {
    -webkit-appearance: none; width: 20px; height: 20px;
    background: var(--surface); border: 3px solid var(--green);
    border-radius: 50%; cursor: pointer;
    box-shadow: 0 2px 8px rgba(22,163,74,0.3);
    transition: box-shadow 0.2s, transform 0.15s;
}
.calc-slider::-webkit-slider-thumb:hover {
    box-shadow: 0 2px 16px rgba(22,163,74,0.5); transform: scale(1.1);
}
.calc-slider::-moz-range-thumb {
    width: 20px; height: 20px; background: var(--surface);
    border: 3px solid var(--green); border-radius: 50%; cursor: pointer;
}
.calc-ticks {
    display: flex; justify-content: space-between; align-items: flex-start;
    margin-top: 6px; padding: 0 2px;
}
.calc-tick {
    font-size: 0.62rem; color: var(--text-3); text-align: center;
    position: relative; cursor: pointer; user-select: none;
    transition: color 0.2s;
}
.calc-tick::before {
    content: ''; display: block; width: 1px; height: 5px;
    background: var(--border-2); margin: 0 auto 2px;
}
.calc-tick:hover { color: var(--green); }

.calc-results {
    display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px;
}
.calc-result-card {
    border-radius: 12px; padding: 16px 10px;
    text-align: center; border: 1px solid var(--border);
    transition: transform 0.3s, box-shadow 0.3s;
}
.calc-result-card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.08); }
.calc-result-bad  { background: #fef2f2; border-color: #fecaca; }
.calc-result-good { background: #f0fdf4; border-color: rgba(22,163,74,0.2); }
.calc-result-save {
    background: linear-gradient(135deg, #f0fdf4, #ecfdf5);
    border: 2px solid var(--green);
    box-shadow: 0 4px 20px rgba(22,163,74,0.15);
}
.calc-result-label {
    font-size: 0.62rem; font-weight: 600; color: var(--text-3);
    text-transform: uppercase; letter-spacing: 1.2px; margin-bottom: 8px;
}
.calc-result-row {
    display: flex; justify-content: center; align-items: baseline;
    gap: 4px; margin-bottom: 4px;
}
.calc-result-val {
    font-size: 1.25rem; font-weight: 800; letter-spacing: -0.5px;
    color: var(--text); font-family: var(--mono);
    transition: all 0.3s;
}
.calc-result-period { font-size: 0.68rem; color: var(--text-3); font-weight: 500; }
.calc-result-save .calc-result-val { color: var(--green); font-size: 1.4rem; }
.calc-result-time {
    font-size: 0.68rem; color: var(--text-3); margin-top: 4px;
    padding-top: 6px; border-top: 1px solid var(--border);
}
.calc-result-save .calc-result-time { border-color: rgba(22,163,74,0.2); }

.calc-footer {
    display: flex; flex-direction: column; align-items: center;
    gap: 10px; margin-top: 20px; padding-top: 16px;
    border-top: 1px solid var(--border);
}
.calc-note { font-size: 0.65rem; color: var(--text-3); text-align: center; max-width: 420px; line-height: 1.5; }

.btn-calc {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 10px 24px; font-size: 0.85rem; font-weight: 600;
    font-family: var(--font); color: #000; background: var(--green);
    border: none; border-radius: 10px; cursor: pointer;
    text-decoration: none; transition: all 0.25s;
}
.btn-calc:hover { opacity: 0.85; color: #000; transform: translateY(-1px); box-shadow: 0 4px 16px rgba(22,163,74,0.35); }
.btn-calc svg { width: 16px; height: 16px; fill: currentColor; }

/* ─── Responsive ──────────────────────────────── */
@media (max-width: 960px) {
    .hero {
        grid-template-columns: 1fr;
        padding: 100px 24px 60px;
        min-height: auto;
        gap: 32px;
    }
    .hero-left { text-align: center; }
    .hero-sub { margin-left: auto; margin-right: auto; }
    .hero-actions { justify-content: center; }
    .contact-layout { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .navbar { padding: 0 16px; }
    .nav-center { display: none; }
    .nav-hamburger { display: flex; }
    .hero { padding: 90px 16px 48px; }
    .hero h1 { letter-spacing: -1px; }
    .section { padding: 60px 16px; }
    .section-title { font-size: 1.6rem; }
    .privacy-banner { flex-direction: column; text-align: center; padding: 32px 24px; }
    .footer { flex-direction: column; gap: 16px; text-align: center; }
    .calc-card { padding: 20px 16px; }
    .calc-results { grid-template-columns: 1fr; gap: 8px; }
    .calc-result-card { padding: 12px 10px; }
    .calc-result-val { font-size: 1.1rem; }
    .calc-result-save .calc-result-val { font-size: 1.2rem; }
    .calc-footer .btn-calc { width: 100%; justify-content: center; }
    .form-row { grid-template-columns: 1fr; }
    .contact-form { padding: 20px 16px; }
    .captcha-group { flex-direction: column; align-items: flex-start; gap: 10px; }
    .captcha-group input { width: 100%; }
    .cta-section h2 { font-size: 1.6rem; letter-spacing: -0.5px; }
    .cta-section { padding: 60px 16px; }
    .pricing-grid { gap: 16px; }
    .price-card { padding: 28px 20px; }
    .video-frame { border-radius: 10px; }
    .video-chrome { padding: 7px 10px; gap: 8px; }
    .video-chrome-title { font-size: 0.62rem; }
    .video-chrome-spacer { width: 40px; }
    .dot { width: 9px; height: 9px; }
}
@media (max-width: 480px) {
    .hero { padding: 80px 14px 40px; }
    .hero h1 { font-size: 2rem; letter-spacing: -0.5px; }
    .hero-sub { font-size: 0.95rem; }
    .btn-primary, .btn-ghost { padding: 12px 20px; font-size: 0.88rem; width: 100%; text-align: center; }
    .hero-actions { flex-direction: column; }
    .section { padding: 48px 14px; }
    .section-title { font-size: 1.35rem; }
    .section-desc { font-size: 0.88rem; }
    .steps-grid { gap: 14px; }
    .step-card { padding: 24px 20px; }
    .features-grid { gap: 14px; }
    .feature-card { padding: 20px 16px; }
    .pricing-grid { gap: 14px; }
    .price-card { padding: 24px 18px; }
    .price-amount { font-size: 2.2rem; }
    .cta-section h2 { font-size: 1.35rem; }
    .video-chrome-title { font-size: 0.58rem; }
    .video-chrome-spacer { width: 30px; }
    .video-meta { font-size: 0.7rem; }
    .privacy-banner { padding: 24px 16px; margin-bottom: 60px; }
    .privacy-icon { width: 48px; height: 48px; }
    .faq-question { font-size: 0.88rem; padding: 14px 12px; }
    .faq-answer { padding: 0 12px 14px; }
    .calc-label { font-size: 0.74rem; }
    .calc-label strong { font-size: 0.85rem; }
    .trusted-logos { gap: 16px; flex-wrap: wrap; }
}