/* ═══════════════════════════════════════════════════════
   InboxShield — Landing Page Design System
   Premium Dark Mode · Glassmorphism · Blue→Green Gradient
   ═══════════════════════════════════════════════════════ */

/* ── Reset & Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

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

:root {
    /* Colors */
    --bg-primary: #060a13;
    --bg-secondary: #0a0f1c;
    --bg-card: rgba(15, 23, 42, 0.6);
    --bg-card-hover: rgba(20, 30, 55, 0.8);
    --border-glass: rgba(148, 163, 184, 0.1);
    --border-glass-hover: rgba(148, 163, 184, 0.2);

    --blue: #3B82F6;
    --green: #10B981;
    --cyan: #06B6D4;
    --purple: #A78BFA;
    --amber: #F59E0B;
    --red-soft: #F87171;

    --text-primary: #F1F5F9;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;

    --gradient-brand: linear-gradient(135deg, #3B82F6, #10B981);
    --gradient-bg: radial-gradient(ellipse at 50% 0%, rgba(59,130,246,0.08) 0%, transparent 60%);

    /* Typography */
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --section-padding: 100px 0;
    --container-width: 1200px;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    max-width: 100%;
    height: auto;
}

/* ── Container ── */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ── Section Base ── */
section {
    padding: var(--section-padding);
    position: relative;
}

.section-label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
    display: inline-block;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 640px;
    line-height: 1.7;
}

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

.mx-auto {
    margin-left: auto;
    margin-right: auto;
}

/* ── Gradient Text ── */
.gradient-text {
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 36px;
    border-radius: 12px;
    font-family: var(--font);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-brand);
    color: white;
    box-shadow: 0 4px 24px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 40px rgba(59, 130, 246, 0.45);
}

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

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-glass);
    backdrop-filter: blur(12px);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-glass-hover);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 20px 48px;
    font-size: 1.125rem;
    border-radius: 14px;
}

.btn-icon {
    font-size: 1.25em;
}

/* ── Navbar ── */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all 0.3s ease;
    background: transparent;
}

.navbar.scrolled {
    background: rgba(6, 10, 19, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    padding: 12px 0;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
    font-weight: 700;
}

.navbar-brand .logo-icon {
    width: 36px;
    height: 36px;
    background: var(--gradient-brand);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.navbar-cta .btn {
    padding: 10px 24px;
    font-size: 0.875rem;
}

/* ── Hero ── */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(59,130,246,0.12) 0%, rgba(16,185,129,0.06) 40%, transparent 70%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(to top, var(--bg-primary), transparent);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 860px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    border-radius: 100px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 32px;
    backdrop-filter: blur(12px);
}

.hero-badge .badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--green);
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
    50% { opacity: 0.8; box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.25rem);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-trust {
    margin-top: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.trust-item .trust-icon {
    font-size: 1.1rem;
}

/* ── Problem Section ── */
.problem {
    background: var(--bg-secondary);
}

.problem-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin-top: 48px;
}

.problem-card {
    padding: 40px;
    border-radius: 20px;
    border: 1px solid var(--border-glass);
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    position: relative;
    overflow: hidden;
}

.problem-card.bad {
    border-color: rgba(248, 113, 113, 0.2);
}

.problem-card.bad::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--red-soft), transparent);
}

.problem-card.good {
    border-color: rgba(16, 185, 129, 0.2);
}

.problem-card.good::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--green), transparent);
}

.problem-card .card-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.problem-card h3 {
    font-size: 1.375rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.problem-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
}

.problem-card .status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 0.8125rem;
    font-weight: 600;
    margin-top: 20px;
}

.status-badge.spam {
    background: rgba(248, 113, 113, 0.1);
    color: var(--red-soft);
}

.status-badge.inbox {
    background: rgba(16, 185, 129, 0.1);
    color: var(--green);
}

/* ── How It Works ── */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 56px;
}

.step-card {
    padding: 40px 32px;
    border-radius: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    backdrop-filter: blur(12px);
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
}

.step-card:hover {
    border-color: var(--border-glass-hover);
    background: var(--bg-card-hover);
    transform: translateY(-4px);
}

.step-number {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: var(--gradient-brand);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: 24px;
}

.step-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.step-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* ── Features Bento Grid ── */
.features {
    background: var(--bg-secondary);
}

.bento-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 56px;
}

.bento-card {
    padding: 36px 28px;
    border-radius: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    backdrop-filter: blur(12px);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.bento-card:hover {
    border-color: var(--border-glass-hover);
    background: var(--bg-card-hover);
    transform: translateY(-4px);
}

.bento-card .feature-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 20px;
    position: relative;
}

.bento-card .feature-icon::after {
    content: '';
    position: absolute;
    inset: -8px;
    border-radius: 18px;
    opacity: 0.15;
    filter: blur(12px);
    z-index: -1;
}

.icon-blue { background: rgba(59,130,246,0.15); }
.icon-blue::after { background: var(--blue); }
.icon-green { background: rgba(16,185,129,0.15); }
.icon-green::after { background: var(--green); }
.icon-cyan { background: rgba(6,182,212,0.15); }
.icon-cyan::after { background: var(--cyan); }
.icon-purple { background: rgba(167,139,250,0.15); }
.icon-purple::after { background: var(--purple); }
.icon-amber { background: rgba(245,158,11,0.15); }
.icon-amber::after { background: var(--amber); }

.bento-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.bento-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
}

/* ── Dashboard Preview ── */
.preview-frame {
    margin-top: 56px;
    border-radius: 20px;
    border: 1px solid var(--border-glass);
    overflow: hidden;
    background: var(--bg-card);
    box-shadow: 0 32px 80px rgba(0,0,0,0.4);
    position: relative;
}

.preview-frame::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 44px;
    background: rgba(15,23,42,0.9);
    border-bottom: 1px solid var(--border-glass);
    z-index: 2;
}

.preview-frame::after {
    content: '● ● ●';
    position: absolute;
    top: 13px;
    left: 18px;
    font-size: 0.6rem;
    letter-spacing: 6px;
    color: var(--text-muted);
    z-index: 3;
}

.preview-frame img {
    display: block;
    width: 100%;
    margin-top: 44px;
}

/* ── Pricing ── */
.pricing-card {
    max-width: 560px;
    margin: 56px auto 0;
    padding: 48px;
    border-radius: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    backdrop-filter: blur(12px);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.pricing-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-brand);
}

.pricing-badge {
    display: inline-flex;
    padding: 6px 16px;
    border-radius: 100px;
    background: rgba(16,185,129,0.1);
    color: var(--green);
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.price {
    font-size: 4rem;
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: 8px;
}

.price-note {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 32px;
}

.pricing-features {
    list-style: none;
    text-align: left;
    margin-bottom: 36px;
}

.pricing-features li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-glass);
    font-size: 0.9375rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 12px;
}

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

.pricing-features .check {
    color: var(--green);
    font-size: 1.1rem;
    flex-shrink: 0;
}

/* ── FAQ ── */
.faq-list {
    max-width: 720px;
    margin: 56px auto 0;
}

.faq-item {
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    margin-bottom: 12px;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: var(--border-glass-hover);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    user-select: none;
    transition: color 0.3s ease;
}

.faq-question:hover {
    color: var(--blue);
}

.faq-arrow {
    font-size: 1.25rem;
    transition: transform 0.3s ease;
    color: var(--text-muted);
}

.faq-item.active .faq-arrow {
    transform: rotate(180deg);
    color: var(--blue);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer-inner {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
}

/* ── Final CTA ── */
.final-cta {
    background: var(--bg-secondary);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.final-cta::before {
    content: '';
    position: absolute;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59,130,246,0.1) 0%, transparent 60%);
    pointer-events: none;
}

.final-cta h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.final-cta p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 520px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

/* ── Footer ── */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-glass);
    text-align: center;
}

.footer p {
    color: var(--text-muted);
    font-size: 0.8125rem;
}

/* ── Scroll Reveal Animations ── */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* ── Responsive ── */
@media (max-width: 768px) {
    :root {
        --section-padding: 64px 0;
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    .hero p {
        font-size: 1.0625rem;
    }

    .btn-lg {
        padding: 16px 32px;
        font-size: 1rem;
    }

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

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

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

    .hero-trust {
        flex-direction: column;
        gap: 16px;
    }

    .pricing-card {
        padding: 32px 24px;
    }

    .price {
        font-size: 3rem;
    }

    .navbar-brand span {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-buttons .btn {
        width: 100%;
    }
}