/* ========================================
   Checkpoint Landing Page Styles
   ======================================== */

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

html {
    scroll-behavior: smooth;
}

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

/* ---------- Animated Background ---------- */
.landing-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    background: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 50%, #0f0f1a 100%);
    overflow: hidden;
}

.landing-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(168, 85, 247, 0.1) 0%, transparent 40%);
    animation: bgPulse 15s ease-in-out infinite;
}

@keyframes bgPulse {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    33% {
        transform: translate(2%, -2%) scale(1.02);
    }

    66% {
        transform: translate(-2%, 2%) scale(0.98);
    }
}

/* Floating Orbs */
.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.orb-2 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #8b5cf6, #a855f7);
    top: 60%;
    right: 10%;
    animation-delay: -5s;
}

.orb-3 {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, #a855f7, #6366f1);
    bottom: 20%;
    left: 30%;
    animation-delay: -10s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) rotate(0deg);
    }

    25% {
        transform: translate(30px, -30px) rotate(5deg);
    }

    50% {
        transform: translate(-20px, 20px) rotate(-5deg);
    }

    75% {
        transform: translate(20px, 10px) rotate(3deg);
    }
}

/* ---------- Container ---------- */
.landing-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ---------- Header ---------- */
.landing-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-md) var(--space-lg);
    backdrop-filter: var(--blur);
    background: rgba(15, 15, 26, 0.8);
    border-bottom: 1px solid var(--border-color);
}

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

.landing-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-xl);
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.landing-logo .logo-img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.header-nav {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
}

.header-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.header-nav a:hover {
    color: var(--text-primary);
}

/* ---------- Hero Section ---------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 6rem var(--space-lg) 4rem;
}

.hero-content {
    max-width: 800px;
}

.alpha-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-md);
    background: rgba(99, 102, 241, 0.2);
    border: 1px solid rgba(99, 102, 241, 0.4);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--space-lg);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.4);
    }

    50% {
        box-shadow: 0 0 0 10px rgba(99, 102, 241, 0);
    }
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, #f0f0f5 0%, #a0a0b0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero h1 span {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 3vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: var(--accent-gradient);
    color: #fff;
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: transparent;
    color: var(--text-primary);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent-primary);
}

/* ---------- Hero Image ---------- */
.hero-image-container {
    position: relative;
    margin-top: 4rem;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
    width: 100%;
}

.hero-image-large {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.5);
    position: relative;
    z-index: 2;
    background: var(--bg-card);
}

.hero-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 110%;
    height: 110%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.2) 0%, transparent 70%);
    filter: blur(40px);
    z-index: 1;
    pointer-events: none;
}

/* ---------- What is Checkpoint Section ---------- */
.what-is-checkpoint {
    padding: 4rem 0 5rem;
    background: rgba(99, 102, 241, 0.03);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.what-is-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.what-is-content h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: var(--space-lg);
}

.what-is-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-xl);
}

.what-is-description strong {
    color: var(--text-primary);
}

.what-is-description em {
    color: var(--accent-primary);
    font-style: normal;
    font-weight: 500;
}

.what-is-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    transition: border-color var(--transition-fast);
}

.highlight-item:hover {
    border-color: var(--accent-primary);
}

.highlight-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.what-is-tagline {
    font-size: var(--font-size-base);
    color: var(--text-muted);
    font-style: italic;
}

/* ---------- Features Section ---------- */
.features {
    padding: 6rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.section-header p {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.feature-card {
    padding: var(--space-xl);
    background: var(--bg-card);
    backdrop-filter: var(--blur);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(99, 102, 241, 0.15);
    border-color: rgba(99, 102, 241, 0.3);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
    display: block;
}

.feature-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* ---------- App Showcase Gallery (Full-Width Screenshots) ---------- */
.showcase {
    padding: 4rem 0 6rem;
}

.showcase-gallery {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    margin-top: 2rem;
}

.showcase-item {
    max-width: 900px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    /* Start smaller, expand on scroll */
    transform: scale(0.92);
    opacity: 0.7;
}

.showcase-item.visible {
    transform: scale(1);
    opacity: 1;
}

.showcase-item:hover {
    transform: scale(1.02);
    box-shadow: 0 20px 60px rgba(99, 102, 241, 0.2);
}

.showcase-item img {
    width: 100%;
    height: auto;
    display: block;
    border-bottom: 1px solid var(--border-color);
    position: relative;
}

/* Click to expand hint overlay */
.showcase-item figure {
    position: relative;
}

.showcase-item::before {
    content: '🔍 Click to expand';
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    padding: var(--space-xs) var(--space-sm);
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    color: #fff;
    font-size: var(--font-size-xs);
    border-radius: var(--radius-sm);
    opacity: 0;
    transition: opacity var(--transition-fast);
    z-index: 10;
    pointer-events: none;
}

.showcase-item:hover::before {
    opacity: 1;
}

.showcase-item figcaption {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-lg);
}

.showcase-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.showcase-item figcaption strong {
    display: block;
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-xs);
}

.showcase-item figcaption p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin: 0;
}

/* Mobile adjustments */
@media (max-width: 768px) {
    .showcase-gallery {
        gap: 2rem;
    }

    .showcase-item {
        margin: 0 var(--space-md);
    }

    .showcase-item figcaption {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }

    .showcase-icon {
        margin: 0 auto;
    }

    /* Mobile: Show hint briefly on scroll-in, then fade out */
    .showcase-item::before,
    .step-screenshot::before {
        content: '👆 Tap to expand';
        opacity: 0;
        animation: none;
    }

    .showcase-item.visible::before,
    .step-screenshot.visible::before {
        animation: hintFadeInOut 3s ease-out forwards;
    }

    @keyframes hintFadeInOut {
        0% {
            opacity: 0;
            transform: translateY(-5px);
        }

        15% {
            opacity: 1;
            transform: translateY(0);
        }

        70% {
            opacity: 1;
        }

        100% {
            opacity: 0;
        }
    }
}

/* ---------- Lightbox Overlay ---------- */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    cursor: zoom-out;
}

.lightbox.hidden {
    display: none;
}

.lightbox img {
    max-width: 90%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.5);
    cursor: default;
}

/* ---------- How It Works Section - Visual Steps ---------- */
.how-it-works {
    padding: 6rem 0;
    background: rgba(30, 30, 50, 0.3);
}

.steps-visual {
    display: flex;
    flex-direction: column;
    gap: 6rem;
    margin-top: 3rem;
}

.step-visual {
    max-width: 100%;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 2.5fr;
    gap: 3rem;
    align-items: center;
}

.step-visual:nth-child(even) {
    grid-template-columns: 2.5fr 1fr;
    direction: rtl;
}

.step-visual:nth-child(even) .step-header {
    direction: ltr;
}

.step-header {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
    margin-bottom: 0;
}

.step-number {
    width: 60px;
    height: 60px;
    min-width: 60px;
    background: var(--accent-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    font-weight: 700;
    box-shadow: 0 10px 40px rgba(99, 102, 241, 0.3);
}

.step-content h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-xs);
}

.step-content p {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.6;
}

.step-screenshot {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    transition: transform var(--transition-base), box-shadow var(--transition-base), opacity var(--transition-base);
    /* Start smaller, expand on scroll */
    transform: scale(0.92);
    opacity: 0.7;
    position: relative;
}

.step-screenshot.visible {
    transform: scale(1);
    opacity: 1;
}

.step-screenshot:hover {
    transform: scale(1.02);
    box-shadow: 0 20px 60px rgba(99, 102, 241, 0.2);
}

/* Click to expand hint for step screenshots */
.step-screenshot::before {
    content: '🔍 Click to expand';
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    color: #fff;
    font-size: var(--font-size-xs);
    border-radius: var(--radius-sm);
    opacity: 0;
    transition: opacity var(--transition-fast);
    z-index: 10;
    pointer-events: none;
}

.step-screenshot:hover::before {
    opacity: 1;
}

.step-screenshot img {
    width: 100%;
    height: auto;
    display: block;
}

/* Mobile adjustments for steps */
@media (max-width: 768px) {
    .step-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .step-visual {
        margin: 0 var(--space-md);
        display: flex;
        flex-direction: column;
        gap: var(--space-lg);
    }

    .step-visual:nth-child(even) {
        flex-direction: column;
        direction: ltr;
        /* Reset text direction for mobile */
    }
}

/* ---------- Comparison Section ---------- */
.comparison-section {
    padding: 6rem 0;
}

.comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    max-width: 900px;
    margin: 0 auto;
    margin-top: 2rem;
}

.comparison-column {
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    backdrop-filter: var(--blur);
}

.comparison-column h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-lg);
    text-align: center;
}

.comparison-checkpoint {
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.comparison-others {
    background: rgba(239, 68, 68, 0.05);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.comparison-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.comparison-list li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
    font-size: var(--font-size-sm);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.comparison-list li:last-child {
    border-bottom: none;
}

.comparison-list .check {
    color: #22c55e;
    font-weight: 700;
    font-size: 1.1em;
}

.comparison-list .x {
    color: #ef4444;
    font-weight: 700;
    font-size: 1.1em;
}

/* Mobile adjustments for comparison */
@media (max-width: 768px) {
    .comparison {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
        margin: 0 var(--space-md);
        margin-top: 2rem;
    }

    .comparison-column {
        padding: var(--space-lg);
    }
}

/* ---------- Privacy Section ---------- */
.privacy {
    padding: 6rem 0;
    text-align: center;
}

.privacy-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    border-radius: var(--radius-full);
    color: var(--success);
    font-weight: 600;
    margin-bottom: var(--space-lg);
}

.privacy h2 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    margin-bottom: var(--space-md);
}

.privacy p {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

.tech-stack {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    flex-wrap: wrap;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
}

.tech-item span:first-child {
    font-size: 2rem;
}

.tech-item span:last-child {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* ---------- CTA Section ---------- */
.cta {
    padding: 6rem 0;
    text-align: center;
}

.cta-card {
    padding: 4rem var(--space-xl);
    background: var(--bg-card);
    backdrop-filter: var(--blur);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    max-width: 700px;
    margin: 0 auto;
}

.cta h2 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    margin-bottom: var(--space-md);
}

.cta p {
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

/* ---------- Footer ---------- */
.landing-footer {
    padding: var(--space-xl) 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

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

.feedback-btn {
    margin-top: var(--space-md);
    padding: var(--space-sm) var(--space-lg);
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.feedback-btn:hover {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-2px);
}

/* ---------- Animations on Scroll ---------- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- Mobile Responsive ---------- */
@media (max-width: 768px) {
    .landing-header .landing-container {
        flex-direction: column;
        gap: var(--space-md);
    }

    .header-nav {
        gap: var(--space-md);
    }

    .hero {
        padding-top: 8rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }

    .orb-1 {
        width: 200px;
        height: 200px;
    }

    .orb-2 {
        width: 150px;
        height: 150px;
    }

    .orb-3 {
        width: 100px;
        height: 100px;
    }
}

/* ---------- Light Theme ---------- */
[data-theme="light"] .landing-bg {
    background: linear-gradient(135deg, #f5f5f7 0%, #e5e5ea 50%, #f5f5f7 100%);
}

[data-theme="light"] .landing-bg::before {
    background:
        radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(168, 85, 247, 0.08) 0%, transparent 40%);
}

[data-theme="light"] .orb {
    opacity: 0.3;
}

[data-theme="light"] .landing-header {
    background: rgba(245, 245, 247, 0.9);
}

[data-theme="light"] .hero h1 {
    background: linear-gradient(135deg, #1a1a2e 0%, #4a4a5a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}