/* ============================================
   NotaViva Landing Page - Premium Design
   ============================================ */

:root {
    --bg-primary: #0a0f1a;
    --bg-secondary: #0f1923;
    --bg-card: #151f2e;
    --bg-card-hover: #1a2740;
    --text-primary: #f0f4f8;
    --text-secondary: #8899aa;
    --text-muted: #5a6a7a;
    --accent: #2dd4a8;
    --accent-dark: #1aa37e;
    --accent-glow: rgba(45, 212, 168, 0.15);
    --accent-glow-strong: rgba(45, 212, 168, 0.3);
    --border: rgba(255, 255, 255, 0.06);
    --border-accent: rgba(45, 212, 168, 0.2);
    --danger: #ff6b6b;
    --warning: #ffd93d;
    --success: #2dd4a8;
    --radius: 16px;
    --radius-sm: 10px;
    --radius-lg: 24px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(45, 212, 168, 0.08);
}

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

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   Particles
   ============================================ */
.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.particle {
    position: absolute;
    background: var(--accent);
    border-radius: 50%;
    opacity: 0.08;
    animation: float linear infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) translateX(0); opacity: 0.08; }
    25% { transform: translateY(-80px) translateX(30px); opacity: 0.15; }
    50% { transform: translateY(-40px) translateX(-20px); opacity: 0.05; }
    75% { transform: translateY(-120px) translateX(15px); opacity: 0.12; }
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 20px 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar.scrolled {
    padding: 12px 0;
    background: rgba(10, 15, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s;
}

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

.nav-cta {
    background: var(--accent) !important;
    color: var(--bg-primary) !important;
    padding: 10px 22px;
    border-radius: 100px;
    font-weight: 600 !important;
    transition: all 0.3s !important;
}

.nav-cta:hover {
    background: var(--accent-dark) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(45, 212, 168, 0.3);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 100px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: var(--bg-primary);
    box-shadow: 0 4px 20px rgba(45, 212, 168, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(45, 212, 168, 0.35);
}

.btn-ghost {
    color: var(--text-secondary);
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(10px);
}

.btn-ghost:hover {
    color: var(--text-primary);
    border-color: var(--border-accent);
    background: var(--accent-glow);
    transform: translateY(-2px);
}

.btn-large {
    padding: 18px 36px;
    font-size: 1.05rem;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    position: relative;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--accent-glow);
    border: 1px solid var(--border-accent);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 24px;
}

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

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

h1 {
    font-size: 3.8rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent), #6ee7b7, var(--accent-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
    max-width: 520px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 24px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 36px;
    background: var(--border);
}

/* Phone Mockup */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
}

.phone-mockup {
    position: relative;
    z-index: 2;
}

.phone-frame {
    width: 280px;
    height: 580px;
    background: var(--bg-secondary);
    border-radius: 36px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    padding: 12px;
    position: relative;
    box-shadow: 
        0 0 0 1px rgba(255, 255, 255, 0.05),
        0 20px 60px rgba(0, 0, 0, 0.5),
        0 0 80px rgba(45, 212, 168, 0.08);
}

.phone-notch {
    width: 100px;
    height: 24px;
    background: var(--bg-primary);
    border-radius: 0 0 16px 16px;
    margin: 0 auto 12px;
}

.phone-screen {
    background: var(--bg-primary);
    border-radius: 24px;
    height: calc(100% - 36px);
    overflow: hidden;
    padding: 16px;
}

.app-preview {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.app-header-preview {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 0 12px;
    font-weight: 600;
    font-size: 0.85rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 4px;
}

.app-logo-small {
    font-size: 1.2rem;
}

.app-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border);
    animation: card-slide-in 0.6s ease-out forwards;
    opacity: 0;
    transform: translateY(10px);
}

.app-card:nth-child(2) { animation-delay: 0.1s; }
.app-card:nth-child(3) { animation-delay: 0.2s; }
.app-card:nth-child(4) { animation-delay: 0.3s; }
.app-card:nth-child(5) { animation-delay: 0.4s; }

@keyframes card-slide-in {
    to { opacity: 1; transform: translateY(0); }
}

.app-card.green { border-left: 3px solid var(--success); }
.app-card.yellow { border-left: 3px solid var(--warning); }
.app-card.red { border-left: 3px solid var(--danger); }

.card-icon { font-size: 1.4rem; }

.card-info {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
}

.card-name {
    font-size: 0.8rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-expiry {
    font-size: 0.65rem;
    font-weight: 500;
}

.card-expiry.ok { color: var(--success); }
.card-expiry.warning { color: var(--warning); }
.card-expiry.danger { color: var(--danger); }

.card-qty {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    white-space: nowrap;
}

/* Floating Cards */
.floating-card {
    position: absolute;
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 12px 18px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    white-space: nowrap;
    z-index: 3;
}

.card-1 {
    top: 15%;
    right: -30px;
    animation: float-card 4s ease-in-out infinite;
    border-color: var(--border-accent);
}

.card-2 {
    bottom: 20%;
    left: -20px;
    animation: float-card 4s ease-in-out infinite 1.5s;
    border-color: var(--border-accent);
}

@keyframes float-card {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.hero-gradient-blur {
    position: absolute;
    top: 20%;
    right: 10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(45, 212, 168, 0.08), transparent 70%);
    pointer-events: none;
}

/* ============================================
   Sections
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--accent-glow);
    border: 1px solid var(--border-accent);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section-header h2 {
    font-size: 2.8rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

/* ============================================
   Features
   ============================================ */
.features {
    padding: 120px 0;
    position: relative;
    z-index: 1;
}

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

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px);
}

.feature-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.feature-card:hover {
    border-color: var(--border-accent);
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.feature-card.featured {
    border-color: var(--border-accent);
    background: linear-gradient(135deg, var(--bg-card), rgba(45, 212, 168, 0.05));
}

.feature-icon-wrap {
    margin-bottom: 20px;
}

.feature-icon {
    width: 52px;
    height: 52px;
    background: var(--accent-glow);
    border: 1px solid var(--border-accent);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

.feature-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.feature-tag {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--accent);
    color: var(--bg-primary);
    padding: 4px 12px;
    border-radius: 100px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================
   How It Works
   ============================================ */
.how-it-works {
    padding: 120px 0;
    position: relative;
    z-index: 1;
}

.steps-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
}

.step {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    flex: 1;
    max-width: 320px;
    position: relative;
    transition: all 0.4s;
    opacity: 0;
    transform: translateY(20px);
}

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

.step:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.step-number {
    font-size: 3rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent), transparent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.3;
    margin-bottom: 8px;
}

.step-content h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.step-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.step-icon {
    font-size: 2.5rem;
    margin-top: 20px;
}

.step-connector {
    display: flex;
    align-items: center;
    opacity: 0.3;
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
    padding: 80px 0 120px;
    position: relative;
    z-index: 1;
}

.cta-card {
    background: linear-gradient(135deg, var(--bg-card), rgba(45, 212, 168, 0.08));
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-lg);
    padding: 80px 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px);
}

.cta-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.cta-glow {
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 400px;
    background: radial-gradient(circle, rgba(45, 212, 168, 0.1), transparent 70%);
    pointer-events: none;
}

.cta-card h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.cta-card p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: 60px 0 30px;
    border-top: 1px solid var(--border);
    position: relative;
    z-index: 1;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-tagline {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 8px;
}

.footer-links {
    display: flex;
    gap: 64px;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.footer-col a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.85rem;
    transition: color 0.3s;
}

.footer-col a:hover {
    color: var(--accent);
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 968px) {
    h1 { font-size: 2.8rem; }
    .section-header h2 { font-size: 2.2rem; }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-description { margin: 0 auto 32px; }
    .hero-actions { justify-content: center; }
    .hero-stats { justify-content: center; }
    
    .hero-visual {
        display: none;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .steps-grid {
        flex-direction: column;
    }
    
    .step-connector {
        transform: rotate(90deg);
    }
    
    .step { max-width: 100%; }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 640px) {
    h1 { font-size: 2.2rem; }
    .section-header h2 { font-size: 1.8rem; }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-links a:not(.nav-cta) {
        display: none;
    }
    
    .cta-card {
        padding: 48px 24px;
    }
    
    .cta-card h2 {
        font-size: 1.8rem;
    }
}