/* ==========================================
   Variables & Base Styles
   ========================================== */
:root {
    --bg-dark: #0a0a0f;
    --bg-card: #12121a;
    --bg-card-hover: #1a1a25;
    --text-primary: #f0f0f5;
    --text-secondary: #8888a0;
    --text-muted: #55556a;
    
    --ping-primary: #00d4aa;
    --ping-secondary: #00a884;
    --scrybook-primary: #a855f7;
    --scrybook-secondary: #6366f1;
    --vocanote-primary: #f97316;
    --vocanote-secondary: #ef4444;
    
    --border-subtle: rgba(255, 255, 255, 0.06);
    --glow-intensity: 0.4;
    
    --font-display: 'Sora', sans-serif;
    --font-body: 'Outfit', sans-serif;
    
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

/* Noise overlay for texture */
.noise-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ==========================================
   Header & Navigation
   ========================================== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1.5rem 0;
    background: linear-gradient(to bottom, var(--bg-dark) 0%, transparent 100%);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: transform 0.3s var(--transition-smooth);
}

.logo:hover {
    transform: scale(1.02);
}

.logo-svg {
    height: 36px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s var(--transition-smooth);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--ping-primary);
    transition: width 0.3s var(--transition-smooth);
}

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

.nav-links a:hover::after {
    width: 100%;
}

.nav-links a.nav-license {
    background: linear-gradient(135deg, var(--ping-primary) 0%, var(--scrybook-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    padding: 0.5rem 1rem;
    border: 1px solid var(--ping-primary);
    border-radius: 20px;
    transition: all 0.3s var(--transition-smooth);
}

.nav-links a.nav-license::after {
    display: none;
}

.nav-links a.nav-license:hover {
    background: var(--ping-primary);
    -webkit-background-clip: unset;
    -webkit-text-fill-color: var(--bg-dark);
    background-clip: unset;
    box-shadow: 0 0 20px rgba(0, 212, 170, 0.3);
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    text-align: center;
    z-index: 2;
    animation: fadeInUp 1s var(--transition-smooth);
}

.hero h1 {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
}

.highlight {
    background: linear-gradient(135deg, var(--ping-primary) 0%, var(--scrybook-primary) 50%, var(--vocanote-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto 4rem;
}

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    animation: float 3s ease-in-out infinite;
}

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid var(--text-muted);
    border-radius: 13px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--text-muted);
    border-radius: 2px;
    animation: scroll 2s ease-in-out infinite;
}

.hero-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.15;
}

.shape-1 {
    width: 600px;
    height: 600px;
    background: var(--ping-primary);
    top: -200px;
    right: -200px;
    animation: pulse-shape 8s ease-in-out infinite;
}

.shape-2 {
    width: 500px;
    height: 500px;
    background: var(--scrybook-primary);
    bottom: -150px;
    left: -150px;
    animation: pulse-shape 10s ease-in-out infinite reverse;
}

.shape-3 {
    width: 400px;
    height: 400px;
    background: var(--vocanote-primary);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: pulse-shape 6s ease-in-out infinite;
}

/* ==========================================
   Software Sections
   ========================================== */
.software-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 6rem 0;
}

.section-bg {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    opacity: 0.05;
    pointer-events: none;
}

.ping-u-bg {
    background: radial-gradient(ellipse at 20% 50%, var(--ping-primary) 0%, transparent 60%);
}

.scrybook-bg {
    background: radial-gradient(ellipse at 80% 50%, var(--scrybook-primary) 0%, transparent 60%);
}

.vocanote-bg {
    background: radial-gradient(ellipse at 20% 50%, var(--vocanote-primary) 0%, transparent 60%);
}

.software-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 24px;
    padding: 4rem;
    position: relative;
    overflow: hidden;
    transition: transform 0.5s var(--transition-smooth), box-shadow 0.5s var(--transition-smooth);
}

.software-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.1) 50%, transparent 100%);
}

.software-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 40px 80px -20px rgba(0, 0, 0, 0.5);
}

.software-card.reverse {
    direction: rtl;
}

.software-card.reverse > * {
    direction: ltr;
}

/* Card Visual */
.card-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 350px;
}

.icon-wrapper {
    width: 200px;
    height: 200px;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.software-icon {
    width: 100%;
    height: 100%;
}

.floating-elements {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.float-item {
    position: absolute;
    font-size: 2rem;
    animation: float 4s ease-in-out infinite;
}

.float-item:nth-child(1) {
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.float-item:nth-child(2) {
    top: 20%;
    right: 15%;
    animation-delay: 1s;
}

.float-item:nth-child(3) {
    bottom: 15%;
    left: 20%;
    animation-delay: 2s;
}

/* Card Content */
.card-content {
    position: relative;
}

.software-number {
    font-family: var(--font-display);
    font-size: 6rem;
    font-weight: 700;
    position: absolute;
    top: -60px;
    right: 0;
    color: var(--text-primary);
    opacity: 0.03;
    letter-spacing: -0.05em;
}

.card-content h2 {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

#ping-u .card-content h2 {
    background: linear-gradient(135deg, var(--ping-primary) 0%, var(--ping-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

#scrybook .card-content h2 {
    background: linear-gradient(135deg, var(--scrybook-primary) 0%, var(--scrybook-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

#vocanote .card-content h2 {
    background: linear-gradient(135deg, var(--vocanote-primary) 0%, var(--vocanote-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.software-description {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.tech-tags {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.tag {
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.75rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s var(--transition-smooth);
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--ping-primary) 0%, var(--ping-secondary) 100%);
    color: var(--bg-dark);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px -10px var(--ping-primary);
}

.btn-primary.scrybook-btn {
    background: linear-gradient(135deg, var(--scrybook-primary) 0%, var(--scrybook-secondary) 100%);
}

.btn-primary.scrybook-btn:hover {
    box-shadow: 0 10px 30px -10px var(--scrybook-primary);
}

.btn-primary.vocanote-btn {
    background: linear-gradient(135deg, var(--vocanote-primary) 0%, var(--vocanote-secondary) 100%);
}

.btn-primary.vocanote-btn:hover {
    box-shadow: 0 10px 30px -10px var(--vocanote-primary);
}

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

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

/* ==========================================
   Footer
   ========================================== */
footer {
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--border-subtle);
    background: linear-gradient(to top, rgba(0,0,0,0.3) 0%, transparent 100%);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.footer-brand {
    display: flex;
    align-items: center;
}

.footer-logo {
    height: 26px;
    width: auto;
}

.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

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

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

.copyright {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-align: center;
}

.heart {
    color: var(--vocanote-primary);
    display: inline-block;
    animation: heartbeat 1.5s ease-in-out infinite;
}

/* ==========================================
   Animations
   ========================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

@keyframes scroll {
    0%, 100% {
        opacity: 1;
        transform: translateY(0);
    }
    50% {
        opacity: 0.3;
        transform: translateY(6px);
    }
}

@keyframes pulse-shape {
    0%, 100% {
        transform: scale(1);
        opacity: 0.15;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.2;
    }
}

@keyframes heartbeat {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.2);
    }
}

/* Pulse rings for Ping-u icon */
.pulse-ring {
    animation: pulse-ring 2s ease-out infinite;
}

.pulse-ring.delay {
    animation-delay: 1s;
}

@keyframes pulse-ring {
    0% {
        opacity: 1;
        transform-origin: center;
    }
    100% {
        opacity: 0;
        transform: scale(1.5);
        transform-origin: center;
    }
}

/* Sound waves for VocaNote */
.wave {
    animation: sound-wave 1.5s ease-in-out infinite;
}

.wave-2 {
    animation-delay: 0.3s;
}

@keyframes sound-wave {
    0%, 100% {
        opacity: 0.3;
    }
    50% {
        opacity: 1;
    }
}

/* ==========================================
   Responsive
   ========================================== */
@media (max-width: 968px) {
    .software-card {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 2.5rem;
    }
    
    .software-card.reverse {
        direction: ltr;
    }
    
    .card-visual {
        height: 250px;
    }
    
    .software-number {
        font-size: 4rem;
        top: -40px;
    }
    
    .card-content h2 {
        font-size: 2.25rem;
    }
}

@media (max-width: 640px) {
    .nav-links {
        display: none;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .tagline {
        font-size: 1rem;
    }
    
    .software-card {
        padding: 1.5rem;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .btn {
        justify-content: center;
        width: 100%;
    }
}

/* ==========================================
   Scroll Reveal Animation Classes
   ========================================== */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.8s var(--transition-smooth), transform 0.8s var(--transition-smooth);
}

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