/* ==========================================================================
   Nave Landing Page — YC-Minimal Aesthetic
   ========================================================================== */

/* CSS Variables — Dark Mode (Testing) */
:root {
    --color-bg: #0a0a0a;
    --color-bg-alt: #141414;
    --color-text: #f5f5f5;
    --color-text-muted: #a0a0a0;
    --color-text-light: #707070;
    --color-accent: #d4af37;
    --color-accent-hover: #c9a227;
    --color-border: #2a2a2a;
    --color-white: #1a1a1a;
    --color-success: #22c55e;
    
    --font-family: 'Instrument Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
    --spacing-2xl: 6rem;
    
    --max-width: 1200px;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    
    --transition: 0.2s ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
}

input {
    font-family: inherit;
}

/* ==========================================================================
   Navigation
   ========================================================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.logo-img {
    width: 32px;
    height: 32px;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--transition);
}

.nav-link:hover {
    color: var(--color-text);
}

.nav-link-active {
    color: var(--color-text);
}

/* ==========================================================================
   About Page
   ========================================================================== */

.about-hero {
    padding-top: calc(80px + var(--spacing-2xl));
    padding-bottom: var(--spacing-xl);
    background: var(--color-bg);
}

.about-hero-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    text-align: center;
}

.about-headline {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.about-subtext {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* Vision Section */
.about-vision {
    padding-top: calc(80px + var(--spacing-2xl));
    padding-bottom: var(--spacing-xl);
    background: var(--color-bg-alt);
}

.about-vision-container {
    max-width: 700px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    text-align: center;
}

.vision-text {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.vision-text:last-child {
    margin-bottom: 0;
    font-style: italic;
    color: var(--color-text);
}

/* Founders Section */
.about-founders {
    padding: var(--spacing-2xl) 0;
    background: var(--color-bg);
}

.about-founders-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.about-founders .section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.founders-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.founder-card {
    padding: var(--spacing-xl);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    text-align: center;
}

.founder-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

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

.founder-story {
    font-size: 1rem;
    color: var(--color-text-muted);
    line-height: 1.8;
}

@media (max-width: 768px) {
    .founders-grid {
        grid-template-columns: 1fr;
    }
    
    .founder-card {
        padding: var(--spacing-lg);
    }
}

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

.hero {
    position: relative;
    padding-top: calc(60px + var(--spacing-lg));
    padding-bottom: var(--spacing-2xl);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

/* Mobile video and legend (hidden on desktop) */
.hero-bg-video {
    display: none;
}

/* Hide mobile legend on desktop */
.hero > .hero-legend:not(.hero-legend-desktop) {
    display: none;
}

/* Desktop legend is visible */
.hero-legend-desktop {
    display: flex !important;
    margin: 30px auto 0 auto !important;
    padding: var(--spacing-lg) var(--spacing-xl) !important;
    width: 100%;
    max-width: 900px;
    justify-content: center;
}

.hero-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: var(--spacing-xl);
}

.hero-content {
    max-width: 600px;
    text-align: left;
}

.hero-headline {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.headline-mobile {
    display: none;
}

.headline-desktop {
    display: inline;
}

.hero-subtext {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

/* Form Styles */
.hero-form,
.cta-form {
    margin-bottom: var(--spacing-sm);
}

.form-group {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.form-group input[type="email"] {
    flex: 1;
    min-width: 200px;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-bg-alt);
    color: var(--color-text);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input[type="email"]:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(201, 162, 39, 0.1);
}

.form-group input[type="email"]::placeholder {
    color: var(--color-text-light);
}

.btn-primary {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-white);
    background: var(--color-text);
    border-radius: var(--border-radius);
    transition: background var(--transition), transform var(--transition);
}

.btn-primary:hover {
    background: #333;
    transform: translateY(-1px);
}

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

.form-note {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-top: var(--spacing-xs);
}

.form-success {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    background: rgba(34, 197, 94, 0.1);
    border-radius: var(--border-radius);
    color: var(--color-success);
    font-weight: 500;
}

.form-success.hidden {
    display: none;
}

/* Hero Visual (Phone + Legend) */
.hero-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    justify-self: center;
}

.hero-phone {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-shrink: 0;
}

.hero-legend {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 10;
    margin-top: 0;
    margin: 0 auto var(--spacing-lg);
    max-width: var(--max-width);
}

.legend-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.legend-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(8, auto);
    justify-content: center;
    gap: 12px 24px;
}

@media (max-width: 900px) {
    .legend-list {
        grid-template-columns: repeat(4, auto);
    }
}

@media (max-width: 500px) {
    .legend-list {
        grid-template-columns: repeat(2, auto);
    }
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}

.legend-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text);
}

.iphone-frame {
    position: relative;
    width: 280px;
    height: 580px;
    background: #1a1a1a;
    border-radius: 48px;
    padding: 10px;
    border: 3px solid #3a3a3a;
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.3),
        0 40px 80px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    transform: rotate(3deg);
}

.iphone-screen {
    width: 100%;
    height: 100%;
    background: #000;
    border-radius: 38px;
    overflow: hidden;
    position: relative;
}

.iphone-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
}

/* ==========================================================================
   Features Section
   ========================================================================== */

.features {
    padding: var(--spacing-2xl) 0;
    background: var(--color-bg-alt);
}

.features-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    text-align: center;
    margin-bottom: var(--spacing-xs);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.feature-card {
    padding: var(--spacing-lg);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: transform var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.06);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.feature-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.feature-desc {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* ==========================================================================
   Social Proof Section
   ========================================================================== */

.social-proof {
    padding: var(--spacing-2xl) 0;
    background: #0a0a0a;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.social-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    text-align: center;
}

.proof-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.stat-number {
    font-size: clamp(3rem, 8vw, 4.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--color-accent);
    line-height: 1;
}

.stat-label {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

.proof-text {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.bulk-cta {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.bulk-cta .proof-text strong {
    color: var(--color-text);
}

.btn-secondary {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-accent);
    background: transparent;
    border: 2px solid var(--color-accent);
    border-radius: var(--border-radius);
    transition: background var(--transition), color var(--transition);
    text-decoration: none;
}

.btn-secondary:hover {
    background: var(--color-accent);
    color: var(--color-bg);
}

.partner-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
}

.partner-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.partner-divider {
    color: var(--color-border);
}

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

.final-cta {
    padding: var(--spacing-2xl) 0;
    background: #141414;
    color: #f5f5f5;
}

.cta-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    text-align: center;
}

.cta-headline {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-lg);
}

.cta-form {
    margin-bottom: var(--spacing-md);
}

.cta-form .form-group {
    justify-content: center;
}

.cta-form input[type="email"] {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #f5f5f5;
}

.cta-form input[type="email"]::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.cta-form input[type="email"]:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.25);
    background: rgba(255, 255, 255, 0.12);
}

.cta-form .btn-primary {
    background: var(--color-accent);
    color: #0a0a0a;
}

.cta-form .btn-primary:hover {
    background: #e5c04a;
}

.final-cta .form-success {
    background: rgba(34, 197, 94, 0.2);
    justify-content: center;
}

/* App Store Badge */
.app-store-badge {
    margin-top: var(--spacing-lg);
}

.coming-soon-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--border-radius-lg);
    color: #f5f5f5;
}

.coming-soon-badge svg {
    width: 28px;
    height: 28px;
}

.badge-text {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.badge-small {
    font-size: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0.7;
}

.badge-large {
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
    padding: var(--spacing-lg) 0;
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.footer-logo-img {
    width: 24px;
    height: 24px;
}

.footer-logo-text {
    font-size: 1rem;
    font-weight: 600;
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    transition: color var(--transition);
}

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

.footer-copyright {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

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

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero {
        padding-top: 72px;
        padding-bottom: var(--spacing-lg);
        min-height: auto;
        flex-direction: column;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        text-align: center;
    }
    
    .hero-headline {
        padding-top: var(--spacing-md);
    }
    
    .headline-desktop {
        display: none;
    }
    
    .headline-mobile {
        display: inline;
    }
    
    .form-group {
        justify-content: center;
    }
    
    .hero-bg-video {
        display: block;
        width: calc(100% - 32px);
        height: 55vh;
        overflow: hidden;
        margin: 0 auto;
        border-radius: 40px 40px 0 0;
        background: #1a1a1a;
        padding: 8px;
        padding-bottom: 0;
        border: 3px solid #3a3a3a;
        border-bottom: none;
        box-shadow: 
            0 10px 40px rgba(0, 0, 0, 0.25),
            0 20px 60px rgba(0, 0, 0, 0.15);
    }
    
    .hero-bg-video video {
        width: 100%;
        height: 150%;
        object-fit: cover;
        object-position: center top;
        border-radius: 32px 32px 0 0;
    }
    
    .hero > .hero-legend {
        display: flex;
    }
    
    .hero-container {
        position: relative;
        z-index: 1;
    }
    
    .hero-phone {
        display: none;
    }
    
    .hero-visual {
        display: none;
    }
    
    .hero-legend-desktop {
        display: none;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-legend {
        height: auto;
        padding: var(--spacing-sm) var(--spacing-md);
        margin: var(--spacing-md) var(--spacing-md) var(--spacing-lg);
        border-radius: var(--border-radius-lg);
    }
    
    .legend-list {
        display: grid;
        grid-template-columns: repeat(4, auto);
        gap: 8px 12px;
    }
    
    .legend-item {
        gap: 4px;
    }
    
    .legend-dot {
        width: 10px;
        height: 10px;
    }
    
    .legend-label {
        font-size: 0.7rem;
    }
    
    .legend-title {
        font-size: 0.65rem;
        margin-bottom: 8px;
    }
    
    .iphone-frame {
        width: 240px;
        height: 327px;
        border-radius: 44px 44px 0 0;
        padding: 10px;
        padding-bottom: 0;
    }
    
    .iphone-screen {
        height: 470px;
        border-radius: 36px 36px 0 0;
    }
    
    
    .form-group {
        flex-direction: column;
    }
    
    .form-group input[type="email"],
    .btn-primary {
        width: 100%;
    }
    
    .form-note {
        text-align: center;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .feature-card {
        padding: var(--spacing-md);
    }
    
    .partner-logos {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .partner-divider {
        display: none;
    }
    
    .footer-container {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-2xl: 4rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 3rem;
    }
}