/* ══════════════════════════════════════════════════════════════
   landing.css — Landing Page Styles
   Source: docs-new/04_UIUX/wireframes.md Section 1
   ══════════════════════════════════════════════════════════════ */

/* ─── Navbar ─── */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: box-shadow var(--transition-base);
}
.navbar--scrolled { box-shadow: var(--shadow-md); }
.navbar__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-6);
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.navbar__brand {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
}
.navbar__brand-icon { font-size: 1.5rem; }
.navbar__nav {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    list-style: none;
}
.navbar__link {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
    transition: color var(--transition-fast);
}
.navbar__link:hover { color: var(--text-primary); }
.navbar__actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}
.navbar__toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

/* ─── Hero Section ─── */
.hero {
    padding-top: calc(var(--header-height) + var(--space-12));
    padding-bottom: var(--space-12);
    background: linear-gradient(135deg, #f0fdf4 0%, #ecfeff 50%, #eff6ff 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(34, 197, 94, 0.05) 0%, transparent 70%);
    animation: hero-pulse 8s ease-in-out infinite;
}
@keyframes hero-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}
.hero__content {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}
.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--color-primary-light);
    color: #15803d;
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    margin-bottom: var(--space-6);
}
.hero__title {
    font-size: clamp(2rem, 5vw, var(--font-size-4xl));
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: var(--space-4);
}
.hero__title span { color: var(--color-primary); }
.hero__subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-8);
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}
.hero__actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}
.hero__cta {
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-base);
    border-radius: var(--border-radius-lg);
}

/* ─── Stats Bar ─── */
.stats-bar {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-8) 0;
}
.stats-bar__grid {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-4);
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
    text-align: center;
}
.stat-item__value {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--color-primary);
}
.stat-item__label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: var(--space-1);
}

/* ─── Features Section ─── */
.features {
    padding: var(--space-12) 0;
    background: var(--bg-primary);
}
.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--space-10);
}
.section-header h2 {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    margin-bottom: var(--space-3);
}
.section-header p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}
.features__grid {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-4);
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}
.feature-card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--space-8) var(--space-6);
    text-align: center;
    border: 1px solid transparent;
    transition: all var(--transition-base);
}
.feature-card:hover {
    border-color: var(--color-primary-light);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.feature-card__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    margin: 0 auto var(--space-4);
    background: var(--color-primary-light);
    border-radius: 50%;
    color: var(--color-primary);
}
.feature-card__title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--space-2);
}
.feature-card__desc {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ─── Feature Showcase (Detail sections) ─── */
.feature-showcase {
    padding: var(--space-12) 0;
}
.feature-showcase:nth-child(even) {
    background: var(--bg-secondary);
}
.feature-showcase__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-10);
    align-items: center;
}
.feature-showcase--reverse .feature-showcase__inner {
    direction: rtl;
}
.feature-showcase--reverse .feature-showcase__inner > * {
    direction: ltr;
}
.feature-showcase__text {
    max-width: 480px;
}
.feature-showcase__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-3);
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-4);
}
.feature-showcase__title {
    font-size: clamp(1.4rem, 2.5vw, var(--font-size-3xl));
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.3;
    margin-bottom: var(--space-3);
}
.feature-showcase__desc {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-6);
}
.feature-showcase__list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}
.feature-showcase__list li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.5;
}
.feature-showcase__list li svg {
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--color-primary);
}
/* Visual mockup card */
.feature-showcase__visual {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}
.feature-showcase__visual::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), #0d47a1);
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}
/* Mock UI elements inside visual */
.mock-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--border-color);
}
.mock-header__title {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--text-primary);
}
.mock-header__badge {
    font-size: 10px;
    padding: 2px 8px;
    border-radius: 12px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-weight: 600;
}
.mock-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-2) 0;
    border-bottom: 1px solid #f0f0f0;
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}
.mock-row:last-child { border-bottom: none; }
.mock-row__name { font-weight: 500; color: var(--text-primary); }
.mock-row__value { font-weight: 700; color: var(--color-primary); }
.mock-stat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}
.mock-stat {
    text-align: center;
    padding: var(--space-3);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
}
.mock-stat__value {
    font-size: var(--font-size-lg);
    font-weight: 800;
    color: var(--text-primary);
}
.mock-stat__label {
    font-size: 10px;
    color: var(--text-muted);
    margin-top: 2px;
}
.mock-chart {
    height: 80px;
    background: linear-gradient(180deg, rgba(26,115,232,0.08) 0%, transparent 100%);
    border-radius: var(--border-radius);
    position: relative;
    overflow: hidden;
    margin-top: var(--space-3);
}
.mock-chart__line {
    position: absolute;
    bottom: 10px;
    left: 5%;
    width: 90%;
    height: 50px;
    border-bottom: 2px solid var(--color-primary);
    border-radius: 0 0 60% 40%;
}
.mock-product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-2);
}
.mock-product {
    padding: var(--space-2);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    text-align: center;
}
.mock-product__img {
    width: 100%;
    aspect-ratio: 1;
    background: #e8eaed;
    border-radius: 6px;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 10px;
}
.mock-product__name {
    font-size: 9px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.mock-product__price {
    font-size: 9px;
    color: var(--color-primary);
    font-weight: 700;
}

@media (max-width: 900px) {
    .feature-showcase__inner {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    .feature-showcase--reverse .feature-showcase__inner {
        direction: ltr;
    }
    .feature-showcase__text { max-width: 100%; }
}

/* ─── How It Works ─── */
.how-it-works {
    padding: var(--space-12) 0;
    background: var(--bg-secondary);
}
.steps {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-4);
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
}
.step {
    text-align: center;
    position: relative;
}
.step__number {
    width: 56px;
    height: 56px;
    background: var(--color-primary);
    color: var(--text-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    font-weight: 800;
    margin: 0 auto var(--space-4);
}
.step__title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--space-2);
}
.step__desc {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* ─── Pricing Section ─── */
.pricing {
    padding: var(--space-12) 0;
    background: var(--bg-primary);
}
.pricing__grid {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--space-4);
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
    align-items: start;
}
.pricing-card {
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--space-8);
    text-align: center;
    background: var(--surface-1);
    transition: all var(--transition-base);
    position: relative;
}
.pricing-card--featured {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 1px var(--color-primary), var(--shadow-lg);
    transform: scale(1.03);
}
.pricing-card__badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: var(--text-white);
    padding: var(--space-1) var(--space-4);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-xs);
    font-weight: 700;
}
.pricing-card__name {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
}
.pricing-card__price {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}
.pricing-card__price span {
    font-size: var(--font-size-base);
    font-weight: 400;
    color: var(--text-secondary);
}
.pricing-card__period {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: var(--space-6);
}
.pricing-card__features {
    list-style: none;
    text-align: left;
    margin-bottom: var(--space-6);
}
.pricing-card__features li {
    padding: var(--space-2) 0;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}
.pricing-card__features li::before {
    content: '';
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--success);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='3'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
}
.pricing-card__features li.disabled {
    color: var(--text-muted);
    text-decoration: line-through;
}
.pricing-card__features li.disabled::before {
    background: var(--text-muted);
    opacity: 0.4;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='3'%3E%3Cline x1='18' y1='6' x2='6' y2='18'/%3E%3Cline x1='6' y1='6' x2='18' y2='18'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
}
.pricing-card__cta { width: 100%; }

/* ─── Billing Toggle ─── */
.billing-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
}
.billing-toggle__label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}
.billing-toggle__label.active {
    color: var(--text-primary);
}
.billing-toggle__badge {
    background: var(--success);
    color: white;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 99px;
    white-space: nowrap;
}
.billing-toggle__switch {
    position: relative;
    width: 48px;
    height: 26px;
    cursor: pointer;
}
.billing-toggle__switch input {
    opacity: 0;
    width: 0;
    height: 0;
}
.billing-toggle__slider {
    position: absolute;
    inset: 0;
    background: var(--border-color);
    border-radius: 26px;
    transition: background var(--transition-base);
}
.billing-toggle__slider::before {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: transform var(--transition-base);
    box-shadow: var(--shadow-sm);
}
.billing-toggle__switch input:checked + .billing-toggle__slider {
    background: var(--primary);
}
.billing-toggle__switch input:checked + .billing-toggle__slider::before {
    transform: translateX(22px);
}

/* ─── Pricing Card Yearly Extras ─── */
.pricing-card__billing-note {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-top: -4px;
    margin-bottom: var(--space-2);
}
.pricing-card__saving {
    display: inline-block;
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    font-size: 11px;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 99px;
    margin-bottom: var(--space-2);
}

/* ─── Testimonial ─── */
.testimonials {
    padding: var(--space-12) 0;
    background: var(--bg-secondary);
}
.testimonial-slider {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    padding: 0 var(--space-4);
}
.testimonial-card {
    background: var(--surface-1);
    border-radius: var(--border-radius-lg);
    padding: var(--space-8);
    box-shadow: var(--shadow-sm);
}
.testimonial-card__text {
    font-size: var(--font-size-lg);
    color: var(--text-primary);
    line-height: 1.6;
    font-style: italic;
    margin-bottom: var(--space-4);
}
.testimonial-card__author {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
}

/* ─── FAQ Section ─── */
.faq {
    padding: var(--space-12) 0;
    background: var(--bg-primary);
}
.faq__grid {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}
.faq-item {
    border-bottom: 1px solid var(--border-color);
}
.faq-item:first-child {
    border-top: 1px solid var(--border-color);
}
.faq-item__question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding: var(--space-5) 0;
    background: none;
    border: none;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    text-align: left;
    transition: color 0.15s ease;
}
.faq-item__question:hover { color: var(--color-primary); }
.faq-item__icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    transition: transform 0.25s ease;
    color: var(--text-muted);
}
.faq-item.active .faq-item__icon {
    transform: rotate(45deg);
    color: var(--color-primary);
}
.faq-item__answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}
.faq-item.active .faq-item__answer {
    max-height: 300px;
}
.faq-item__answer p {
    padding: 0 0 var(--space-5);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ─── CTA Section ─── */
.cta-section {
    padding: var(--space-12) 0;
    background: linear-gradient(135deg, #1a73e8 0%, #0d47a1 100%);
    text-align: center;
    color: #ffffff;
}
.cta-section__inner {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}
.cta-section h2 {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    margin-bottom: var(--space-3);
}
.cta-section p {
    font-size: var(--font-size-lg);
    opacity: 0.85;
    margin-bottom: var(--space-6);
}
.cta-section .btn--primary {
    background: #ffffff;
    color: #1a73e8;
    font-weight: 700;
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-base);
}
.cta-section .btn--primary:hover {
    background: #f0f4f9;
    box-shadow: var(--shadow-lg);
}

/* ─── Footer (Enhanced) ─── */
.footer {
    background: #1a1d21;
    color: rgba(255, 255, 255, 0.7);
    padding: var(--space-12) 0 var(--space-6);
}
.footer__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-6);
}
.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-8);
    margin-bottom: var(--space-10);
}
.footer__brand {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: #ffffff;
    margin-bottom: var(--space-3);
}
.footer__brand-desc {
    font-size: var(--font-size-sm);
    color: rgba(255,255,255,0.5);
    line-height: 1.6;
    max-width: 280px;
}
.footer__col-title {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: #ffffff;
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.footer__col-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}
.footer__col-links a {
    color: rgba(255,255,255,0.5);
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: color 0.15s ease;
}
.footer__col-links a:hover { color: #ffffff; }

.footer__bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-3);
}
.footer__copy {
    font-size: var(--font-size-xs);
    color: rgba(255,255,255,0.35);
}
.footer__bottom-links {
    display: flex;
    gap: var(--space-4);
}
.footer__bottom-links a {
    font-size: var(--font-size-xs);
    color: rgba(255,255,255,0.35);
    text-decoration: none;
}
.footer__bottom-links a:hover { color: rgba(255,255,255,0.7); }

/* ─── Promo Banner (marquee below header) ─── */
.promo-banner {
    background: linear-gradient(90deg, var(--color-primary), #16a34a);
    color: #ffffff;
    padding: 6px 0;
    font-size: var(--font-size-sm);
    font-weight: 600;
    position: fixed;
    top: var(--header-height, 64px);
    left: 0;
    right: 0;
    z-index: 99;
    overflow: hidden;
    white-space: nowrap;
}
.promo-banner__text {
    display: inline-block;
    animation: promo-marquee 15s linear infinite;
    padding-left: 100%;
}
@keyframes promo-marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-100%); }
}

/* ─── Responsive ─── */
@media (max-width: 900px) {
    .navbar__nav { display: none; }
    .navbar__toggle { display: block; }
    .features__grid { grid-template-columns: repeat(2, 1fr); }
    .pricing__grid { max-width: 500px; grid-template-columns: 1fr; }
    .pricing-card--featured { transform: none; }
    .stats-bar__grid { grid-template-columns: repeat(2, 1fr); }
    .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
    .hero__title { font-size: 1.75rem; }
    .hero__subtitle { font-size: var(--font-size-base); }
    .features__grid { grid-template-columns: 1fr; }
    .steps { grid-template-columns: 1fr; }
    .hero__actions { flex-direction: column; }
    .footer__grid { grid-template-columns: 1fr; }
    .footer__bottom { flex-direction: column; text-align: center; }
}