/*
    -------------------------------------------------------------------------
    GRADEUP PRO - PREMIUM LANDING HOMEPAGE STYLES
    Sleek, High-Contrast Design matching the Internal App (Linear/Stripe-Inspired)
    -------------------------------------------------------------------------
*/

:root {
    --home-primary: #4F46E5;
    --home-primary-dark: #4338CA;
    --home-accent: #3B82F6;
    --home-text-main: #111827;
    --home-text-body: #374151;
    --home-text-muted: #6B7280;
    --home-border: #E5E7EB;
    --home-bg-light: #FAFAFA;
    --home-bg-card: #FFFFFF;
    --home-radius: 16px;
    --home-radius-button: 50px;
    
    --home-success: #16A34A;
    --home-warning: #F59E0B;
    --home-danger: #EF4444;
}

/* Base resets & layout helper */
.landing-section {
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}
.bg-light-section {
    background-color: var(--home-bg-light);
}
.bg-dark-section {
    background-color: #0B0F19;
    color: #FFFFFF;
}

/* Button aesthetics */
.btn-premium {
    padding: 12px 28px;
    font-size: 0.95rem;
    font-weight: 700;
    border-radius: var(--home-radius-button);
    transition: all 0.25s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}
.btn-premium-primary {
    background-color: var(--home-primary);
    color: #FFFFFF !important;
    border: 1px solid var(--home-primary);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.15);
}
.btn-premium-primary:hover {
    background-color: var(--home-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(79, 70, 229, 0.25);
}
.btn-premium-secondary {
    background-color: var(--home-bg-card);
    color: var(--home-text-main) !important;
    border: 1px solid var(--home-border);
}
.btn-premium-secondary:hover {
    background-color: var(--home-bg-light);
    transform: translateY(-2px);
    border-color: var(--home-text-muted);
}
.btn-premium-dark {
    background-color: #FFFFFF;
    color: #0B0F19 !important;
    border: 1px solid #FFFFFF;
}
.btn-premium-dark:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 255, 255, 0.15);
}

/* 1. Hero Section */
.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 40px;
    align-items: center;
}
@media (max-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-actions {
        justify-content: center;
    }
}
.hero-title {
    font-size: 3.5rem;
    font-weight: 850;
    color: var(--home-text-main);
    letter-spacing: -0.04em;
    line-height: 1.1;
    margin-bottom: 24px;
}
.hero-title span {
    color: var(--home-primary);
}
@media (max-width: 576px) {
    .hero-title {
        font-size: 2.5rem;
    }
}
.hero-subtitle {
    font-size: 1.15rem;
    color: var(--home-text-body);
    line-height: 1.6;
    margin-bottom: 36px;
    font-weight: 500;
}
.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Dashboard Mockup card (Linear style) */
.dashboard-mockup {
    background: var(--home-bg-card);
    border: 1px solid var(--home-border);
    border-radius: var(--home-radius);
    box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.08);
    padding: 24px;
    position: relative;
    max-width: 480px;
    margin: 0 auto;
}
.mockup-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--home-border);
    padding-bottom: 16px;
    margin-bottom: 16px;
}
.mockup-dots {
    display: flex;
    gap: 6px;
}
.mockup-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--home-border);
}
.mockup-title {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--home-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.mockup-kpi {
    background: var(--home-bg-light);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 16px;
    text-align: center;
}
.mockup-val-large {
    font-size: 2.8rem;
    font-weight: 900;
    color: var(--home-primary);
    line-height: 1;
    letter-spacing: -0.03em;
}
.mockup-lbl-large {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--home-text-muted);
    margin-top: 6px;
}

/* 2. Features Section */
.section-header-center {
    text-align: center;
    max-width: 650px;
    margin: 0 auto 60px auto;
}
.section-tag {
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--home-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 12px;
    display: block;
}
.section-headline {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--home-text-main);
    letter-spacing: -0.02em;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
@media (max-width: 1200px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 576px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

.feature-card {
    background: var(--home-bg-card);
    border: 1px solid var(--home-border);
    border-radius: var(--home-radius);
    padding: 30px 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
    transition: all 0.22s;
}
.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px -10px rgba(0, 0, 0, 0.08);
    border-color: var(--home-primary);
}
.feature-icon-wrapper {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    font-size: 1.25rem;
    margin-bottom: 20px;
}
.feature-title {
    font-size: 1.05rem;
    font-weight: 750;
    color: var(--home-text-main);
    margin-bottom: 10px;
}
.feature-desc {
    font-size: 0.88rem;
    color: var(--home-text-muted);
    line-height: 1.5;
    margin: 0;
}

/* 3. Analytics Showcase */
.showcase-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 40px;
    align-items: center;
}
@media (max-width: 992px) {
    .showcase-grid {
        grid-template-columns: 1fr;
    }
}

/* Showcase Dashboard container */
.showcase-dashboard {
    background: var(--home-bg-card);
    border: 1px solid var(--home-border);
    border-radius: var(--home-radius);
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.06);
    padding: 24px;
}
.showcase-tabs {
    display: flex;
    gap: 6px;
    background: var(--home-bg-light);
    border: 1px solid var(--home-border);
    padding: 4px;
    border-radius: 10px;
    margin-bottom: 24px;
}
.showcase-tab {
    flex: 1;
    text-align: center;
    border: none;
    background: transparent;
    padding: 6px 12px;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--home-text-muted);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}
.showcase-tab.active {
    background: var(--home-bg-card);
    color: var(--home-primary);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.showcase-value-display {
    background: var(--home-bg-light);
    border: 1px solid var(--home-border);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    min-height: 140px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.showcase-air {
    font-size: 2.8rem;
    font-weight: 900;
    color: var(--home-primary);
    letter-spacing: -0.04em;
    line-height: 1;
}
.showcase-air-lbl {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--home-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 6px;
}

/* 4. How It Works */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
@media (max-width: 768px) {
    .steps-grid {
        grid-template-columns: 1fr;
    }
}
.step-item {
    text-align: center;
    padding: 20px;
}
.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--home-primary-dark);
    color: #FFFFFF;
    font-size: 1.15rem;
    font-weight: 800;
    display: grid;
    place-items: center;
    margin: 0 auto 24px auto;
}
.step-title {
    font-size: 1.15rem;
    font-weight: 750;
    color: var(--home-text-main);
    margin-bottom: 12px;
}
.step-desc {
    font-size: 0.9rem;
    color: var(--home-text-muted);
    line-height: 1.5;
    margin: 0;
}

/* 5. Pricing Section */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    align-items: stretch;
}
@media (max-width: 992px) {
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 420px;
        margin: 0 auto;
    }
}
.pricing-card {
    background: var(--home-bg-card);
    border: 1.5px solid var(--home-border);
    border-radius: var(--home-radius);
    padding: 40px 30px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.22s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
}
.pricing-card.popular {
    border-color: var(--home-primary);
    box-shadow: 0 20px 40px -15px rgba(79, 70, 229, 0.1);
    position: relative;
}
.pricing-card.popular::before {
    content: 'Most Popular';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--home-primary);
    color: #FFFFFF;
    font-size: 0.72rem;
    font-weight: 800;
    text-transform: uppercase;
    padding: 4px 12px;
    border-radius: 20px;
    letter-spacing: 0.05em;
}
.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 32px -10px rgba(0, 0, 0, 0.06);
}
.plan-name {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--home-text-main);
    margin-bottom: 8px;
}
.plan-price-row {
    margin: 20px 0 24px 0;
}
.plan-price {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--home-text-main);
    letter-spacing: -0.03em;
    line-height: 1;
}
.plan-period {
    font-size: 0.9rem;
    color: var(--home-text-muted);
}
.plan-features {
    list-style: none;
    padding: 0;
    margin: 0 0 32px 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
    text-align: left;
}
.plan-features li {
    font-size: 0.88rem;
    color: var(--home-text-body);
    display: flex;
    align-items: center;
    gap: 8px;
}
.plan-features li i {
    color: var(--home-success);
    font-size: 0.95rem;
}

/* 6. Testimonials Section */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
@media (max-width: 992px) {
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
}
.testimonial-card {
    background: var(--home-bg-card);
    border: 1px solid var(--home-border);
    border-radius: var(--home-radius);
    padding: 30px;
    box-shadow: var(--home-shadow-card);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.testimonial-text {
    font-size: 0.95rem;
    color: var(--home-text-body);
    line-height: 1.6;
    margin-bottom: 24px;
    font-style: italic;
}
.testimonial-user {
    display: flex;
    align-items: center;
    gap: 12px;
}
.user-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--home-border);
    background-size: cover;
    background-position: center;
}
.user-info h6 {
    margin: 0;
    font-weight: 750;
    color: var(--home-text-main);
    font-size: 0.92rem;
}
.user-info p {
    margin: 2px 0 0 0;
    font-size: 0.78rem;
    color: var(--home-primary);
    font-weight: 700;
}

/* 7. Final CTA Section */
.cta-card {
    background: linear-gradient(135deg, #0B0F19 0%, #111827 100%);
    border: 1px solid #1F293D;
    border-radius: 24px;
    padding: 60px 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-headline {
    font-size: 2.5rem;
    font-weight: 850;
    color: #FFFFFF;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
}
.cta-subcopy {
    font-size: 1.1rem;
    color: #9CA3AF;
    max-width: 550px;
    margin: 0 auto 36px auto;
}