/* ===== CSS Variables ===== */
:root {
    /* Dark Theme (Default) */
    --bg-primary: #0a0a0a;
    --bg-secondary: #121212;
    --bg-tertiary: #1a1a1a;
    --text-primary: #e8e8e8;
    --text-secondary: #a0a0a0;
    --accent-red: #dc2626;
    --accent-red-hover: #b91c1c;
    --border-color: #2a2a2a;
    --code-bg: #1a1a1a;
}

[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #e8e8e8;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --accent-red: #dc2626;
    --accent-red-hover: #b91c1c;
    --border-color: #d4d4d4;
    --code-bg: #f5f5f5;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    position: relative;
}

/* Grain texture overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.03;
    z-index: -1;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' /%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' /%3E%3C/svg%3E");
    pointer-events: none;
}

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

/* ===== Navigation ===== */
.navbar {
    position: sticky;
    top: 0;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-brand-link {
    text-decoration: none;
    color: inherit;
    cursor: pointer;
    transition: opacity 0.2s ease;
}

.nav-brand-link:hover {
    opacity: 0.8;
}

.nav-logo {
    height: 50px;
    width: auto;
}

.nav-brand-text {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-primary);
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.nav-brand-text:hover {
    opacity: 0.8;
}

.text-red {
    color: var(--accent-red);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s;
}

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

.github-link,
.facebook-link {
    display: flex;
    align-items: center;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    transition: color 0.2s;
}

.theme-toggle:hover {
    color: var(--text-primary);
}

[data-theme="dark"] .sun-icon {
    display: none;
}

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

/* Mobile Navigation */
.nav-mobile {
    display: none;
    align-items: center;
    gap: 0.75rem;
}

.btn-tools {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    text-decoration: none;
    white-space: nowrap;
}

/* Hamburger Menu */
.hamburger {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 28px;
    height: 28px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    position: relative;
    z-index: 1003;
}

.hamburger span {
    display: block;
    width: 28px;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.hamburger.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-20px);
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Menu Overlay */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--bg-primary);
    z-index: 1002;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-menu.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.mobile-menu-links {
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: center;
}

.mobile-menu-links li {
    margin: 2rem 0;
}

.mobile-menu-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 600;
    transition: color 0.2s ease;
    display: block;
    padding: 0.5rem 2rem;
}

.mobile-menu-links a:hover {
    color: var(--accent-red);
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 4rem 0;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        repeating-linear-gradient(0deg, transparent, transparent 86px, var(--border-color) 86px, var(--border-color) 87px),
        repeating-linear-gradient(60deg, transparent, transparent 86px, var(--border-color) 86px, var(--border-color) 87px),
        repeating-linear-gradient(120deg, transparent, transparent 86px, var(--border-color) 86px, var(--border-color) 87px);
    background-size: 100px 174px;
    opacity: 0.3;
    z-index: 0;
}

.fingerprint-watermark {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    opacity: 0.02;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpath d='M50 10 Q30 30 50 50 Q70 30 50 10' fill='none' stroke='%23ffffff' stroke-width='0.5'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    pointer-events: none;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-logo-text {
    width: 600px;
    max-width: 90%;
    height: auto;
    margin-bottom: 1.5rem;
    opacity: 0.95;
    content: url('assets/logos/logo-text-main.png');
}

[data-theme="dark"] .hero-logo-text,
:root:not([data-theme="light"]) .hero-logo-text {
    content: url('assets/logos/logo-text-dark.png');
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    font-style: italic;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.social-links {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    align-items: center;
    margin-top: 1.5rem;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    padding: 0.25rem;
    text-decoration: none;
}

.social-link:hover {
    color: var(--accent-red);
    transform: translateY(-2px);
}

.social-link svg {
    display: block;
    width: 24px;
    height: 24px;
    stroke: currentColor;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 500;
    transition: all 0.2s;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--accent-red);
    color: #ffffff;
    border-color: var(--accent-red);
}

.btn-primary:hover {
    background-color: var(--accent-red-hover);
    border-color: var(--accent-red-hover);
}

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

.btn-secondary:hover {
    border-color: var(--text-primary);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-outline:hover {
    border-color: var(--accent-red);
    color: var(--accent-red);
}

/* ===== Sections ===== */
section {
    padding: 5rem 0;
}

section h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

section p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 800px;
}

/* ===== About Section ===== */
.about {
    background-color: var(--bg-secondary);
}

.about .container {
    text-align: center;
}

.about p {
    margin: 0 auto;
}

/* ===== Download Section ===== */
.download {
    background-color: var(--bg-primary);
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.download-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    box-sizing: border-box;
    overflow: hidden;
}

.download-card h3 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.vm-screenshot {
    margin-bottom: 1.5rem;
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background-color: var(--bg-tertiary);
}

.vm-screenshot img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
    max-height: 400px;
}

.checksum-section {
    margin-top: 1.5rem;
    text-align: center;
    max-width: 100%;
    overflow: hidden;
}

.checksum-section p {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    text-align: left;
}

.checksum-section .btn {
    display: block;
    width: 100%;
    text-align: center;
    box-sizing: border-box;
}

.checksum {
    display: block;
    background-color: var(--code-bg);
    padding: 1rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    word-break: break-all;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
    text-align: left;
    overflow-wrap: break-word;
    max-width: 100%;
}

.verify-title {
    margin-top: 1rem;
    margin-bottom: 0.25rem !important;
    text-align: left;
}

pre {
    background-color: var(--code-bg);
    padding: 1rem;
    border-radius: 4px;
    overflow-x: auto;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    max-width: 100%;
    box-sizing: border-box;
}

pre code {
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    color: var(--text-primary);
    white-space: pre;
    word-break: normal;
    overflow-wrap: normal;
}

.build-list {
    list-style: none;
    margin: 1.5rem 0;
    padding: 0;
}

.build-list li {
    padding: 0.75rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-secondary);
}

.build-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-red);
}

/* ===== Community Section ===== */
.community {
    background-color: var(--bg-secondary);
    text-align: center;
}

.community p {
    margin: 0 auto 2rem;
}

.community a:not(.btn) {
    color: var(--accent-red);
    text-decoration: none;
}

.community a:not(.btn):hover {
    text-decoration: underline;
}

.social-icon-link {
    display: inline-flex;
    align-items: center;
    margin-left: 0.5rem;
    color: var(--text-primary);
}

.social-icon-link svg {
    vertical-align: middle;
}

.community-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* ===== Footer ===== */
.footer {
    background-color: var(--bg-tertiary);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    text-align: center;
}

.footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-style: italic;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .container {
        padding: 0 1.5rem;
    }

    /* Navigation */
    .navbar {
        padding: 0.75rem 0;
    }

    .nav-logo {
        height: 40px;
    }

    .nav-brand-text {
        font-size: 1rem;
    }

    /* Hide desktop nav, show mobile nav */
    .nav-links-desktop {
        display: none;
    }

    .nav-mobile {
        display: flex;
    }

    /* Hero Section */
    .hero {
        min-height: 70vh;
        padding: 3rem 0;
    }

    .hero-logo-text {
        width: 400px;
    }

    .hero-subtitle {
        font-size: 1.1rem;
        margin-bottom: 2rem;
        padding: 0 1rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
        padding: 0 1rem;
    }

    .btn {
        width: 100%;
        text-align: center;
        padding: 0.875rem 1.5rem;
    }

    .social-links {
        gap: 2rem;
        margin-top: 2rem;
    }

    .social-link svg {
        width: 28px;
        height: 28px;
    }

    /* Download Section */
    .download-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .download-card {
        padding: 1.5rem;
    }

    .vm-screenshot {
        margin-bottom: 1.25rem;
    }

    .vm-screenshot img {
        max-height: 250px;
        object-fit: contain;
    }

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

    .checksum-section .btn {
        width: 100%;
        margin-bottom: 1.5rem;
    }

    .checksum {
        font-size: 0.75rem;
        padding: 0.875rem;
        text-align: left;
    }

    pre {
        text-align: left;
    }

    /* Sections */
    section {
        padding: 3rem 0;
    }

    section h2 {
        font-size: 2rem;
        margin-bottom: 1.5rem;
    }

    /* Community Links */
    .community-links {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }

    .community-link {
        width: 100%;
    }

    /* Code blocks */
    pre {
        font-size: 0.85rem;
        padding: 1rem;
        overflow-x: auto;
    }

    .checksum-text,
    .command-text {
        font-size: 0.75rem;
        word-break: break-all;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    /* Navigation */
    .navbar {
        padding: 0.5rem 0;
    }

    .nav-brand-text {
        font-size: 0.9rem;
    }

    .btn-tools {
        padding: 0.4rem 0.875rem;
        font-size: 0.85rem;
    }

    .theme-toggle {
        padding: 0.25rem;
    }

    .hamburger {
        width: 26px;
        height: 26px;
    }

    .hamburger span {
        width: 26px;
        height: 2.5px;
    }

    .hamburger.active span:nth-child(1) {
        transform: translateY(7.5px) rotate(45deg);
    }

    .hamburger.active span:nth-child(3) {
        transform: translateY(-7.5px) rotate(-45deg);
    }

    .mobile-menu-links a {
        font-size: 1.35rem;
    }

    /* Hero Section */
    .hero {
        min-height: 60vh;
        padding: 2rem 0;
    }

    .hero-logo-text {
        width: 280px;
    }

    .hero-subtitle {
        font-size: 0.95rem;
        margin-bottom: 1.5rem;
        padding: 0 0.5rem;
    }

    .hero-cta {
        padding: 0 0.5rem;
    }

    .btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
    }

    .social-links {
        gap: 1.5rem;
    }

    .social-link svg {
        width: 24px;
        height: 24px;
    }

    /* Sections */
    section {
        padding: 2.5rem 0;
    }

    section h2 {
        font-size: 1.75rem;
        margin-bottom: 1.25rem;
    }

    section p {
        font-size: 0.95rem;
    }

    /* Download Cards */
    .download-card {
        padding: 1.25rem;
    }

    .download-card {
        padding: 1.25rem;
    }

    .download-card h3 {
        font-size: 1.25rem;
    }

    .vm-screenshot {
        margin-bottom: 1rem;
    }

    .vm-screenshot img {
        max-height: 200px;
        object-fit: contain;
    }

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

    .checksum-section .btn {
        width: 100%;
        margin-bottom: 1.25rem;
        padding: 0.875rem 1rem;
    }

    .checksum {
        font-size: 0.7rem;
        padding: 0.75rem;
        margin-bottom: 1.25rem;
    }

    .checksum-section p {
        font-size: 0.9rem;
    }

    pre {
        margin-bottom: 1rem;
    }

    pre code {
        font-size: 0.7rem;
    }

    /* Code blocks */
    pre {
        font-size: 0.75rem;
        padding: 0.75rem;
    }

    .checksum-text,
    .command-text {
        font-size: 0.7rem;
    }

    /* Footer */
    .footer {
        padding: 1.5rem 0;
    }

    .footer p {
        font-size: 0.85rem;
    }
}

/* Extra small devices */
@media (max-width: 360px) {
    .nav-brand-text {
        font-size: 0.8rem;
    }

    .btn-tools {
        padding: 0.35rem 0.75rem;
        font-size: 0.8rem;
    }

    .hamburger {
        width: 24px;
        height: 24px;
    }

    .hamburger span {
        width: 24px;
        height: 2px;
    }

    .hamburger.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .hamburger.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .mobile-menu-links a {
        font-size: 1.25rem;
    }

    .hero-logo-text {
        width: 240px;
    }

    .hero-subtitle {
        font-size: 0.85rem;
    }

    section h2 {
        font-size: 1.5rem;
    }

    .vm-screenshot img {
        max-height: 150px;
    }

    .download-card {
        padding: 1rem;
        overflow: hidden;
    }

    .checksum {
        font-size: 0.65rem;
        padding: 0.625rem;
        word-break: break-all;
        overflow-wrap: break-word;
        max-width: 100%;
    }

    pre {
        padding: 0.625rem;
        overflow-x: auto;
        max-width: 100%;
    }

    pre code {
        font-size: 0.65rem;
        display: block;
    }

    .checksum-section .btn {
        padding: 0.75rem 0.875rem;
        font-size: 0.9rem;
        width: 100%;
    }

    .checksum-section p,
    .verify-title {
        font-size: 0.85rem;
    }
}