/* ==========================================================================
   Site Transition Homepage - Dark Theme Inspired by Linear.app
   ========================================================================== */

/* CSS Variables */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-elevated: #1a1a24;

    --text-primary: #e4e4e7;
    --text-secondary: #a1a1aa;
    --text-tertiary: #71717a;

    --accent-yellow: #FCD34D;
    --accent-blue: #60A5FA;
    --accent-purple: #A78BFA;
    --accent-green: #34D399;
    --accent-pink: #F472B6;
    --accent-orange: #FB923C;

    --border-subtle: rgba(255, 255, 255, 0.05);
    --border-medium: rgba(255, 255, 255, 0.1);

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);

    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ==========================================================================
   Header
   ========================================================================== */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 3rem;
    background-color: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
    transition: var(--transition-base);
}

.logo-text {
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: -0.01em;
    color: var(--text-primary);
    opacity: 0.7;
    transition: var(--transition-fast);
}

.logo-text:hover {
    opacity: 1;
}

.main-nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-medium);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    transform: translateY(-1px);
}

/* ==========================================================================
   Progress Bar
   ========================================================================== */

.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--border-subtle);
    z-index: 1001;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-purple), var(--accent-blue), var(--accent-green));
    width: 0%;
    transition: width 0.3s ease-out;
}

/* ==========================================================================
   Journey Container
   ========================================================================== */

.journey-container {
    position: relative;
    width: 100%;
}

/* ==========================================================================
   Journey Sections
   ========================================================================== */

.journey-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6rem 2rem;
    position: relative;
    opacity: 0.4;
    transform: translateY(40px);
    transition: all var(--transition-slow);
}

.journey-section.active {
    opacity: 1;
    transform: translateY(0);
}

.section-content {
    max-width: 700px;
    width: 100%;
    position: relative;
    z-index: 10;
}

/* Stage Numbers */
.stage-number {
    position: absolute;
    top: 6rem;
    left: 2rem;
    font-size: 8rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.02);
    line-height: 1;
    z-index: 1;
    user-select: none;
    pointer-events: none;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero-section {
    position: relative;
    overflow: hidden;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-purple) 0%, var(--accent-blue) 50%, var(--accent-green) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 600px;
}

/* Scroll Indicator */
.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-tertiary);
    font-size: 0.875rem;
    margin-top: 4rem;
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    opacity: 0.6;
}

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

/* Floating Shapes */
.hero-visual {
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
}

.floating-shapes {
    position: relative;
    width: 100%;
    height: 100%;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.15;
    animation-duration: 20s;
    animation-timing-function: ease-in-out;
    animation-iteration-count: infinite;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--accent-purple);
    top: 10%;
    right: 10%;
    animation-name: float1;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: var(--accent-blue);
    top: 40%;
    right: 30%;
    animation-name: float2;
}

.shape-3 {
    width: 350px;
    height: 350px;
    background: var(--accent-green);
    top: 60%;
    right: 5%;
    animation-name: float3;
}

@keyframes float1 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-30px, 40px) scale(1.1); }
}

@keyframes float2 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(40px, -30px) scale(1.15); }
}

@keyframes float3 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-20px, -50px) scale(0.95); }
}

/* ==========================================================================
   Stage Sections
   ========================================================================== */

.stage-icon {
    margin-bottom: 2rem;
    animation: fadeInUp 0.6s ease-out;
}

.stage-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.stage-description {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}

/* Stage Features */
.stage-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-medium);
    border-radius: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.feature-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

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

/* ==========================================================================
   CTA Section
   ========================================================================== */

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

.cta-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cta-description {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 0.75rem;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    outline: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
    color: white;
    box-shadow: 0 4px 12px rgba(96, 165, 250, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(96, 165, 250, 0.35);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-medium);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
}

.contact-info {
    padding-top: 2rem;
    border-top: 1px solid var(--border-subtle);
    color: var(--text-tertiary);
    font-size: 0.95rem;
}

.contact-info a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: var(--transition-fast);
}

.contact-info a:hover {
    color: var(--accent-purple);
}

/* ==========================================================================
   Animations
   ========================================================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 1024px) {
    .hero-visual {
        width: 60%;
    }

    .stage-number {
        font-size: 6rem;
    }
}

@media (max-width: 768px) {
    .site-header {
        padding: 1rem 1.5rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-visual {
        width: 100%;
        opacity: 0.4;
    }

    .stage-number {
        font-size: 4rem;
        top: 4rem;
        left: 1rem;
    }

    .stage-title {
        font-size: 2rem;
    }

    .stage-description {
        font-size: 1rem;
    }

    .journey-section {
        padding: 4rem 1.5rem;
    }

    .cta-title {
        font-size: 2rem;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
    }

    .stage-features {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .stage-number {
        font-size: 3rem;
    }

    .site-header {
        padding: 1rem;
    }

    .logo-text {
        font-size: 0.85rem;
    }

    .nav-link {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    .site-header,
    .progress-bar,
    .scroll-indicator,
    .floating-shapes {
        display: none;
    }

    .journey-section {
        page-break-inside: avoid;
        opacity: 1 !important;
        transform: none !important;
    }
}