/* ========================================
   CSS Variables & Root Styles
======================================== */
:root {
    /* Colors - Dark Mode (Default) */
    --color-bg: #0a0a0a;
    --color-bg-secondary: #171717;
    --color-bg-tertiary: #262626;
    --color-border: #262626;
    --color-border-hover: #404040;
    --color-text: #fafafa;
    --color-text-secondary: #a3a3a3;
    --color-text-muted: #737373;
    --color-accent: #8b5cf6;
    --color-accent-dark: #7c3aed;
    --color-cyan: #06b6d4;
    --color-green: #22c55e;
    --color-white: #ffffff;
    --color-black: #000000;
    --navbar-bg: rgba(10, 10, 10, 0.8);
    --glow-color: rgba(139, 92, 246, 0.08);
    --glow-bg: rgba(139, 92, 246, 0.15);
    --shadow-color: rgba(0, 0, 0, 0.25);

    /* Spacing */
    --spacing-1: 4px;
    --spacing-2: 8px;
    --spacing-3: 12px;
    --spacing-4: 16px;
    --spacing-5: 20px;
    --spacing-6: 24px;
    --spacing-8: 32px;
    --spacing-10: 40px;
    --spacing-12: 48px;
    --spacing-16: 64px;
    --spacing-24: 96px;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    /* Font */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'IBM Plex Sans Condensed', ui-monospace, SFMono-Regular, 'SF Mono', Consolas, monospace;
    --font-body: 'Inter', sans-serif;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Mode Theme */
[data-theme="light"] {
    --color-bg: #ffffff;
    --color-bg-secondary: #f5f5f5;
    --color-bg-tertiary: #e5e5e5;
    --color-border: #e5e5e5;
    --color-border-hover: #d4d4d4;
    --color-text: #171717;
    --color-text-secondary: #525252;
    --color-text-muted: #737373;
    --color-accent: #7c3aed;
    --color-accent-dark: #6d28d9;
    --navbar-bg: rgba(255, 255, 255, 0.8);
    --glow-color: rgba(139, 92, 246, 0.05);
    --glow-bg: rgba(139, 92, 246, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.1);
}

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

html {
    scroll-behavior: smooth;
    /* Prevent transitions on page load */
    --transition-on-load: none;
}

html.loaded {
    --transition-on-load: var(--transition-slow);
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    transition: background-color var(--transition-on-load), color var(--transition-on-load);
}

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

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

input {
    font-family: inherit;
    border: none;
    outline: none;
    background: none;
}

ul {
    list-style: none;
}

img,
svg {
    display: block;
    max-width: 100%;
}

/* ========================================
   Glow Canvas (Cursor Effect)
======================================== */
.glow-canvas {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    mix-blend-mode: screen;
    opacity: 0.6;
    background: radial-gradient(circle at 50% 50%, var(--glow-bg), transparent 40%);
    transition: background var(--transition-base), opacity var(--transition-slow);
}

[data-theme="light"] .glow-canvas {
    mix-blend-mode: multiply;
    opacity: 0.4;
}

/* ========================================
   Navigation
======================================== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 50;
    border-bottom: 1px solid var(--color-border);
    background-color: var(--navbar-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: background-color var(--transition-slow), border-color var(--transition-slow);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
    height: var(--spacing-16);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.logo-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    background: linear-gradient(to top right, var(--color-accent-dark), var(--color-cyan));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
}

.logo-icon.small {
    width: 24px;
    height: 24px;
    background: var(--color-bg-tertiary);
}

.logo-text {
    font-weight: 700;
    font-size: 18px;
    letter-spacing: -0.025em;
    color: var(--color-text-secondary);
    transition: color var(--transition-slow);
}



.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-8);
}

.nav-links a {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-base);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.theme-toggle {
    padding: var(--spacing-2);
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    position: relative;
}

.theme-toggle .moon-icon,
.theme-toggle .sun-icon {
    transition: opacity var(--transition-base), transform var(--transition-base);
}

.theme-toggle .sun-icon {
    display: none;
}

[data-theme="light"] .theme-toggle .moon-icon {
    display: none;
}

[data-theme="light"] .theme-toggle .sun-icon {
    display: block;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    color: var(--color-text);
    border-color: var(--color-border-hover);
    background-color: var(--color-bg-secondary);
}

.mobile-menu-btn {
    display: none;
    color: var(--color-text-secondary);
}

.mobile-menu-btn:hover {
    color: var(--color-text);
}

.mobile-menu {
    display: none;
    flex-direction: column;
    padding: var(--spacing-4) var(--spacing-6);
    border-top: 1px solid var(--color-border);
    background-color: var(--navbar-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.mobile-menu.active {
    display: flex;
}

.mobile-menu a {
    padding: var(--spacing-3) 0;
    color: var(--color-text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: color var(--transition-base);
}

.mobile-menu a:hover {
    color: var(--color-text);
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }
}

/* ========================================
   Hero Section
======================================== */
.hero {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: calc(var(--spacing-16) + 40px) var(--spacing-6) var(--spacing-6);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    opacity: 0.3;
}

.hero-blur {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 400px;
    background-color: rgba(139, 92, 246, 0.2);
    border-radius: var(--radius-full);
    filter: blur(120px);
    transition: background-color var(--transition-slow);
}

[data-theme="light"] .hero-blur {
    background-color: rgba(139, 92, 246, 0.15);
}

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 896px;
    width: 100%;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-8);
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-1) var(--spacing-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    background-color: rgba(23, 23, 23, 0.5);
    backdrop-filter: blur(4px);
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: var(--color-green);
    border-radius: var(--radius-full);
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.status-text {
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.hero-title {
    font-size: 54px;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.05em;
    display: flex;
    flex-direction: column;
}

.gradient-text {
    background: linear-gradient(to bottom, var(--color-text), var(--color-text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 20px;
    line-height: 1.6;
    color: var(--color-text-secondary);
    max-width: 672px;
    font-weight: 300;
}

.download-box {
    width: 100%;
    max-width: 672px;
    margin-top: var(--spacing-8);
}

.input-wrapper {
    position: relative;
}

.input-glow {
    position: absolute;
    inset: -2px;
    background: transparent;
    border-radius: var(--radius-md);
    opacity: 0;
    filter: blur(8px);
    transition: opacity 1s;
}

.input-wrapper:focus-within .input-glow {
    opacity: 0;
}

.input-container {
    position: relative;
    display: flex;
    align-items: center;
    padding: var(--spacing-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-bg-secondary);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.input-container:focus-within {
    border-color: var(--color-text-muted);
    box-shadow: 0 0 0 1px var(--color-border);
}

.input-icon {
    padding: 0 var(--spacing-4) 0 var(--spacing-3);
    color: var(--color-text-muted);
}

.input-container input {
    flex: 1;
    height: 48px;
    font-size: 14px;
    color: var(--color-text);
    font-family: var(--font-mono);
}

.input-container input::placeholder {
    color: var(--color-text-muted);
}

.download-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    height: 48px;
    padding: 0 var(--spacing-8);
    background-color: var(--color-white);
    color: var(--color-bg);
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-base);
}

.download-btn:hover {
    background-color: var(--color-text-secondary);
}

[data-theme="light"] .download-btn {
    background-color: var(--color-text);
    color: var(--color-bg);
}

[data-theme="light"] .download-btn:hover {
    background-color: var(--color-text-secondary);
}

.features-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-6);
    margin-top: var(--spacing-4);
    font-size: 12px;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

.feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
}

.feature svg {
    color: var(--color-text-muted);
}

/* Mobile button hidden on desktop */
.download-btn-mobile {
    display: none;
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 38px;
        line-height: 1.1;
    }

    .hero-description {
        font-size: 18px;
    }

    /* Hide desktop button inside input on mobile */
    .download-btn-desktop {
        display: none;
    }

    /* Show mobile button below input */
    .download-btn-mobile {
        display: flex;
        width: 100%;
        justify-content: center;
        margin-top: var(--spacing-3);
    }

    .features-bar {
        flex-wrap: wrap;
        gap: var(--spacing-4);
    }
}

/* ========================================
   How To Section
======================================== */
.how-to {
    padding: var(--spacing-6) var(--spacing-6);
    border-top: 1px solid var(--color-border);
    background-color: var(--color-bg-secondary);
    transition: background-color var(--transition-slow);
}

.section-container {
    max-width: 1152px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-16);
}

.section-header h2 {
    font-size: 36px;
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: var(--spacing-4);
}

.section-header p {
    color: var(--color-text-secondary);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-8);
    position: relative;
}

.steps-line {
    display: block;
    position: absolute;
    top: 48px;
    left: 16%;
    right: 16%;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--color-border), transparent);
    z-index: 0;
}

.step-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 10;
}

.step-icon {
    width: 96px;
    height: 96px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background-color: var(--color-bg-secondary);
    margin-bottom: var(--spacing-6);
    box-shadow: 0 0 30px -10px rgba(0, 0, 0, 0.5);
    transition: border-color var(--transition-slow);
}

.step-icon svg {
    color: var(--color-text-secondary);
    transition: color var(--transition-slow);
}

.step-card:hover .step-icon {
    border-color: rgba(139, 92, 246, 0.3);
}

.step-card:hover .step-icon svg {
    color: var(--color-accent);
}

.step-number {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-family: var(--font-mono);
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    background-color: var(--color-bg-secondary);
    margin-bottom: var(--spacing-4);
}

.step-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--spacing-2);
}

.step-card p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-text-secondary);
    max-width: 320px;
}

@media (max-width: 768px) {
    .steps-grid {
        grid-template-columns: 1fr;
    }

    .steps-line {
        display: none;
    }

    .section-header h2 {
        font-size: 30px;
    }
}

/* ========================================
   FAQ Section
======================================== */
.faq {
    padding: var(--spacing-24) var(--spacing-6);
}

.faq-container {
    max-width: 672px;
    margin: 0 auto;
}

.accordion {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.accordion-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-bg-secondary);
    overflow: hidden;
    transition: border-color var(--transition-slow), background-color var(--transition-slow);
}

.accordion-item:hover {
    border-color: var(--color-border-hover);
}

.accordion-item.active {
    border-color: #525252;
}

.accordion-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--spacing-6);
    text-align: left;
    color: var(--color-text-secondary);
}

.accordion-header:focus {
    outline: none;
}

.accordion-header span {
    font-size: 18px;
    font-weight: 500;
}

.accordion-icon {
    color: var(--color-text-muted);
    transition: transform var(--transition-fast), color var(--transition-fast);
}

.accordion-item:hover .accordion-icon {
    color: var(--color-text);
}

.accordion-item.active .accordion-icon {
    transform: rotate(45deg);
}

.accordion-content {
    height: 0;
    overflow: hidden;
    transition: height var(--transition-fast) cubic-bezier(0.25, 0.1, 0.25, 1);
}

.accordion-content p {
    padding: 0 var(--spacing-6) var(--spacing-6);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ========================================
   Footer
======================================== */
.footer {
    padding: var(--spacing-12) var(--spacing-6);
    border-top: 1px solid var(--color-bg-secondary);
    background-color: var(--color-bg);
}

.footer-container {
    max-width: 1280px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: var(--spacing-12);
    margin-bottom: var(--spacing-12);
}

.footer-brand {
    grid-column: span 1;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-4);
}

.footer-logo span {
    font-weight: 700;
    color: var(--color-text-secondary);
}

.footer-tagline {
    font-size: 12px;
    line-height: 1.6;
    color: var(--color-text-muted);
}

.footer-links h4,
.footer-social h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-4);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.footer-links a {
    font-size: 14px;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

.social-icons {
    display: flex;
    gap: var(--spacing-4);
}

.social-link {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    background-color: var(--color-bg-secondary);
    transition: all var(--transition-fast);
}

.social-link:hover {
    color: var(--color-text);
    border-color: var(--color-text-muted);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-8);
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: 12px;
    color: var(--color-text-muted);
}

.footer-credits {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: 12px;
    color: var(--color-text-muted);
}

.credits-highlight {
    color: var(--color-text-secondary);
    font-weight: 600;
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-4);
        text-align: center;
    }
}

/* ========================================
   Scroll Reveal Animation
======================================== */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s cubic-bezier(0.2, 0.8, 0.2, 1),
        transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.reveal-on-scroll.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   Utility Classes
======================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ========================================
   Page Content (About, Terms, Privacy)
======================================== */
.page-content {
    padding: calc(var(--spacing-16) + 40px) var(--spacing-6) var(--spacing-16);
    min-height: 100vh;
}

.page-container {
    max-width: 800px;
    margin: 0 auto;
}

.page-title {
    font-size: 42px;
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: var(--spacing-4);
    background: linear-gradient(to bottom, var(--color-text), var(--color-text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.last-updated {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-12);
    font-family: var(--font-mono);
}

.content-block {
    margin-bottom: var(--spacing-10);
}

.content-block h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    color: var(--color-text);
}

.content-block p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-4);
}

.feature-list,
.terms-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
    margin-top: var(--spacing-4);
}

.feature-list li,
.terms-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.feature-list li svg {
    color: var(--color-green);
    flex-shrink: 0;
    margin-top: 4px;
}

.terms-list li {
    padding-left: var(--spacing-4);
    position: relative;
}

.terms-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

.terms-list li strong {
    color: var(--color-text);
}

.contact-email {
    margin-top: var(--spacing-4);
}

.contact-email a {
    color: var(--color-accent);
    transition: color var(--transition-base);
}

.contact-email a:hover {
    color: var(--color-cyan);
}

@media (max-width: 768px) {
    .page-title {
        font-size: 32px;
    }

    .content-block h2 {
        font-size: 20px;
    }

    .content-block p,
    .feature-list li,
    .terms-list li {
        font-size: 15px;
    }
}