/* ========================================
   Template 02: Linear/Vercel Dark SaaS
   ======================================== */

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

:root {
    --primary: #10b981;
    --primary-light: #10b981;
    --secondary: #059669;
    --bg-primary: #ffffff;
    --bg-secondary: #ffffff;
    --bg-tertiary: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #1f2937;
    --text-muted: #1f2937;
    --border: #1f2937;
    --border-light: #1f2937;
    --success: #10B981;
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 96px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow-sm: 0 0 0 1px rgba(255, 255, 255, 0.05);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
    --glow: 0 0 20px rgba(139, 92, 246, 0.3);
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.header__content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.header__logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.header__nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.header__nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.header__nav a:not(.btn):hover {
    color: var(--text-primary);
}

.header__burger {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
}

.header__burger span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

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

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

.btn--secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn--secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--border-light);
}

.btn--large {
    padding: 14px 28px;
    font-size: 15px;
}

.btn--full {
    width: 100%;
    justify-content: center;
}

/* Hero */
.hero {
    position: relative;
    padding: 160px 0 var(--spacing-xl);
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 1400px;
    height: 600px;
    background: radial-gradient(circle at 50% 0%, rgba(139, 92, 246, 0.15), transparent 60%);
    pointer-events: none;
}

.hero__content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.badge__dot {
    width: 6px;
    height: 6px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

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

.hero__title {
    font-size: 72px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.03em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero__actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-xl);
}

.hero__preview {
    margin-top: var(--spacing-xl);
}

.preview-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
}

.preview-card__header {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.preview-card__dots {
    display: flex;
    gap: 6px;
}

.preview-card__dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-light);
}

.preview-line {
    height: 12px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    margin-bottom: 12px;
}

.preview-line--1 { width: 60%; }
.preview-line--2 { width: 80%; }
.preview-line--3 { width: 40%; }

.preview-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: var(--spacing-md);
}

.preview-item {
    height: 100px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

/* Stats */
.stats {
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.stats__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.stat-item {
    text-align: center;
}

.stat-item__value {
    font-size: 48px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.stat-item__label {
    font-size: 14px;
    color: var(--text-muted);
}

/* Section */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}

.section-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
}

/* Features */
.features {
    padding: var(--spacing-xl) 0;
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.feature-card {
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--border-light);
    transform: translateY(-2px);
}

.feature-card__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.feature-card__title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.feature-card__text {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Workflow */
.workflow {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
}

.workflow__steps {
    max-width: 1000px;
    margin: 0 auto;
}

.workflow-step {
    display: grid;
    grid-template-columns: 80px 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    padding: var(--spacing-xl) 0;
    border-bottom: 1px solid var(--border);
}

.workflow-step:last-child {
    border-bottom: none;
}

.workflow-step--reverse {
    grid-template-columns: 80px 1fr 1fr;
}

.workflow-step--reverse .workflow-step__content {
    order: 2;
}

.workflow-step--reverse .workflow-step__visual {
    order: 1;
}

.workflow-step__number {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
}

.workflow-step__title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.workflow-step__text {
    color: var(--text-secondary);
    font-size: 16px;
}

.visual-box {
    height: 300px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}

/* Testimonials */
.testimonials {
    padding: var(--spacing-xl) 0;
}

.testimonials__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.testimonial-card {
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}

.testimonial-card__stars {
    color: var(--primary);
    font-size: 16px;
    margin-bottom: var(--spacing-sm);
}

.testimonial-card__quote {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.testimonial-card__author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author__avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
}

.author__name {
    font-weight: 600;
    font-size: 14px;
}

.author__role {
    font-size: 13px;
    color: var(--text-muted);
}

/* Pricing */
.pricing {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
}

.pricing__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    max-width: 1100px;
    margin: 0 auto;
}

.pricing-card {
    padding: var(--spacing-lg);
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    position: relative;
}

.pricing-card--featured {
    border-color: var(--primary);
    box-shadow: var(--glow);
}

.pricing-card__badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    padding: 4px 12px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
}

.pricing-card__name {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.pricing-card__price {
    display: flex;
    align-items: baseline;
    margin-bottom: var(--spacing-sm);
}

.price__currency {
    font-size: 24px;
    font-weight: 600;
}

.price__amount {
    font-size: 56px;
    font-weight: 700;
}

.price__period {
    font-size: 14px;
    color: var(--text-muted);
    margin-left: 4px;
}

.pricing-card__desc {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 14px;
}

.pricing-card__features {
    list-style: none;
    margin-bottom: var(--spacing-lg);
}

.pricing-card__features li {
    padding: 10px 0;
    color: var(--text-secondary);
    font-size: 14px;
    border-bottom: 1px solid var(--border);
}

.pricing-card__features li:last-child {
    border-bottom: none;
}

/* FAQ */
.faq {
    padding: var(--spacing-xl) 0;
}

.faq__grid {
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    gap: var(--spacing-sm);
}

.faq-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.faq-item__question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: none;
    border: none;
    font-size: 16px;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    color: var(--text-primary);
}

.faq-item__icon {
    font-size: 20px;
    color: var(--primary);
    transition: var(--transition);
}

.faq-item.active .faq-item__icon {
    transform: rotate(45deg);
}

.faq-item__answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-item__answer {
    max-height: 300px;
    padding: 0 var(--spacing-md) var(--spacing-md);
}

.faq-item__answer p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* CTA */
.cta {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
}

.cta__content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.cta__title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.cta__text {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.cta__form {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 500px;
    margin: 0 auto var(--spacing-sm);
}

.cta__form input {
    flex: 1;
    padding: 14px 20px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 15px;
}

.cta__form input:focus {
    outline: none;
    border-color: var(--primary);
}

.cta__note {
    font-size: 13px;
    color: var(--text-muted);
}

/* Footer */
.footer {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    border-top: 1px solid var(--border);
}

.footer__content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.footer__tagline {
    color: var(--text-muted);
    font-size: 14px;
}

.footer__column h4 {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.footer__column a {
    display: block;
    color: var(--text-muted);
    text-decoration: none;
    margin-bottom: 8px;
    font-size: 13px;
    transition: var(--transition);
}

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

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 13px;
}

.footer__social {
    display: flex;
    gap: var(--spacing-md);
}

.footer__social a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
}

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

/* Responsive */
@media (max-width: 1024px) {
    .features__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .testimonials__grid {
        grid-template-columns: 1fr;
    }
    
    .workflow-step {
        grid-template-columns: 1fr;
    }
    
    .workflow-step__visual {
        order: 3 !important;
    }
}

@media (max-width: 768px) {
    .header__nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .header__nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .header__burger {
        display: flex;
    }
    
    .hero__title {
        font-size: 40px;
    }
    
    .stats__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features__grid {
        grid-template-columns: 1fr;
    }
    
    .pricing__grid {
        grid-template-columns: 1fr;
    }
    
    .footer__content {
        grid-template-columns: 1fr;
    }
    
    .cta__form {
        flex-direction: column;
    }
}