/* ===== Custom Properties ===== */
:root {
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --accent: #f7931a;
    --accent-hover: #e8820a;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --max-width: 1200px;
    --nav-height: 64px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: var(--font-stack);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--accent-hover);
}

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

/* ===== Layout ===== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

section {
    padding: 80px 0;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 16px;
    text-align: center;
}

.section-subtitle {
    color: var(--text-secondary);
    text-align: center;
    max-width: 600px;
    margin: 0 auto 48px;
    font-size: 1.1rem;
}

/* ===== Navigation ===== */
.nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(15, 15, 35, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--card-border);
    height: var(--nav-height);
}

.nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-logo {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-logo svg {
    width: 28px;
    height: 28px;
    fill: var(--accent);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
}

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

.nav-github {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    color: var(--text-primary) !important;
    font-size: 0.85rem;
    font-weight: 500;
}

.nav-github:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary) !important;
}

.nav-github svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.nav-hamburger {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
}

.nav-hamburger svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

/* Mobile nav */
@media (max-width: 768px) {
    .nav-hamburger {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: rgba(15, 15, 35, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 20px;
        border-bottom: 1px solid var(--card-border);
    }

    .nav-links.open {
        display: flex;
    }
}

/* ===== Hero ===== */
.hero {
    padding: 120px 0 80px;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero h1 span {
    color: var(--accent);
}

.hero-subtitle {
    color: var(--text-secondary);
    font-size: 1.2rem;
    max-width: 640px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-ctas {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.btn-primary {
    background: var(--accent);
    color: #000;
    font-weight: 600;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: background 0.2s, transform 0.1s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary:hover {
    background: var(--accent-hover);
    color: #000;
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    font-weight: 500;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: background 0.2s, transform 0.1s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.hero-badges {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.badge {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.badge svg {
    width: 14px;
    height: 14px;
    fill: #4ade80;
}

/* ===== Cards ===== */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: border-color 0.2s, transform 0.2s;
}

.card:hover {
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.card-icon {
    width: 48px;
    height: 48px;
    background: rgba(247, 147, 26, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.card-icon svg {
    width: 24px;
    height: 24px;
    fill: var(--accent);
}

.card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    font-weight: 600;
}

.card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===== Problem/Solution ===== */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

@media (min-width: 768px) {
    .comparison-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.comparison-card {
    position: relative;
}

.comparison-card.highlight {
    border-color: var(--accent);
    background: rgba(247, 147, 26, 0.05);
}

.comparison-card .card-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.comparison-card.highlight .card-label {
    color: var(--accent);
}

.comparison-card ul {
    list-style: none;
    margin-top: 16px;
}

.comparison-card ul li {
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 6px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.comparison-card ul li svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.comparison-card ul li .icon-x {
    fill: #f87171;
}

.comparison-card ul li .icon-check {
    fill: #4ade80;
}

/* ===== Features Grid ===== */
.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ===== How It Works ===== */
.steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    position: relative;
}

@media (min-width: 768px) {
    .steps {
        grid-template-columns: repeat(3, 1fr);
        gap: 48px;
    }
}

.step {
    text-align: center;
    position: relative;
}

.step-number {
    width: 56px;
    height: 56px;
    background: rgba(247, 147, 26, 0.15);
    border: 2px solid var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent);
}

.step h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.step p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Step connector arrows (desktop) */
@media (min-width: 768px) {
    .step:not(:last-child)::after {
        content: '';
        position: absolute;
        top: 28px;
        right: -28px;
        width: 16px;
        height: 2px;
        background: var(--accent);
        opacity: 0.4;
    }
}

/* ===== Screenshots ===== */
.screenshots-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

@media (min-width: 768px) {
    .screenshots-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.screenshot-item {
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    text-align: center;
}

.screenshot-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.screenshot-item img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.screenshot-item span {
    display: block;
    padding: 10px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    background: var(--bg-secondary);
}

.lightbox {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.9);
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.lightbox.active {
    display: flex;
}

.lightbox-img {
    max-width: 90vw;
    max-height: 90vh;
    border-radius: var(--radius-lg);
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 28px;
    font-size: 2.5rem;
    color: #fff;
    background: none;
    border: none;
    cursor: pointer;
    line-height: 1;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.lightbox-close:hover {
    opacity: 1;
}

.lightbox-prev,
.lightbox-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 3rem;
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    cursor: pointer;
    width: 56px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md, 8px);
    opacity: 0.7;
    transition: opacity 0.2s, background 0.2s;
}

.lightbox-prev:hover,
.lightbox-next:hover {
    opacity: 1;
    background: rgba(255, 255, 255, 0.2);
}

.lightbox-prev {
    left: 20px;
}

.lightbox-next {
    right: 20px;
}

/* ===== Mint Warning ===== */
.warning-card {
    background: rgba(247, 147, 26, 0.05);
    border: 2px solid var(--accent);
    border-radius: var(--radius-lg);
    padding: 40px;
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
}

.warning-card h3 {
    font-size: 1.4rem;
    margin-bottom: 16px;
    color: var(--accent);
}

.warning-card p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
}

/* ===== Coming Soon ===== */
.coming-soon-card {
    max-width: 560px;
    margin: 0 auto;
    text-align: center;
    position: relative;
}

.coming-soon-badge {
    display: inline-block;
    background: rgba(247, 147, 26, 0.15);
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 6px 12px;
    border-radius: 100px;
    margin-bottom: 16px;
}

/* ===== Developers ===== */
.dev-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

@media (min-width: 768px) {
    .dev-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.dev-card code {
    display: block;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    font-size: 0.8rem;
    margin-top: 16px;
    color: var(--text-secondary);
    overflow-x: auto;
    white-space: pre;
    font-family: "SF Mono", "Fira Code", monospace;
}

/* ===== Donate ===== */
.donate-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: 48px;
    max-width: 480px;
    margin: 0 auto;
    text-align: center;
}

.donate-section h3 {
    font-size: 1.4rem;
    margin-bottom: 8px;
}

.donate-section > p {
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 0.95rem;
}

.currency-toggle {
    display: flex;
    background: var(--card-bg);
    border-radius: var(--radius-sm);
    padding: 4px;
    margin-bottom: 24px;
    border: 1px solid var(--card-border);
}

.currency-toggle button {
    flex: 1;
    padding: 10px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
    font-family: var(--font-stack);
}

.currency-toggle button.active {
    background: var(--accent);
    color: #000;
    font-weight: 600;
}

.amount-presets {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}

.amount-presets button {
    padding: 12px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
    font-family: var(--font-stack);
}

.amount-presets button:hover {
    border-color: var(--accent);
}

.amount-presets button.active {
    border-color: var(--accent);
    background: rgba(247, 147, 26, 0.1);
    color: var(--accent);
}

.custom-amount {
    margin-bottom: 24px;
}

.custom-amount input {
    width: 100%;
    padding: 12px 16px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    font-size: 1rem;
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color 0.2s;
    font-family: var(--font-stack);
}

.custom-amount input:focus {
    border-color: var(--accent);
}

.custom-amount input::placeholder {
    color: rgba(255, 255, 255, 0.3);
}

.donate-btn {
    width: 100%;
    padding: 14px;
    background: var(--accent);
    color: #000;
    font-weight: 600;
    font-size: 1rem;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    font-family: var(--font-stack);
}

.donate-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.donate-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.donate-status {
    margin-top: 20px;
    font-size: 0.9rem;
    min-height: 24px;
}

.donate-status.loading {
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.donate-status.error {
    color: #f87171;
}

.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== FAQ ===== */
.faq-list {
    max-width: 720px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--card-border);
}

.faq-item:first-child {
    border-top: 1px solid var(--card-border);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.05rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    font-family: var(--font-stack);
    gap: 16px;
}

.faq-question svg {
    width: 24px;
    height: 24px;
    fill: var(--text-secondary);
    flex-shrink: 0;
    transition: transform 0.3s;
}

.faq-item.open .faq-question svg {
    transform: rotate(180deg);
}

.faq-question:hover {
    color: var(--accent);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.open .faq-answer {
    max-height: 500px;
    padding-bottom: 20px;
}

.faq-answer p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 12px;
}

.faq-answer p:last-child {
    margin-bottom: 0;
}

/* ===== Footer ===== */
.footer {
    border-top: 1px solid var(--card-border);
    padding: 48px 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr;
    }
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 8px;
}

.footer h4 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.footer ul {
    list-style: none;
}

.footer ul li {
    margin-bottom: 10px;
}

.footer ul a {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

.footer-bottom {
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--card-border);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ===== Responsive ===== */
@media (min-width: 1280px) {
    .hero h1 {
        font-size: 3.5rem;
    }
}

@media (max-width: 768px) {
    section {
        padding: 60px 0;
    }

    .hero {
        padding: 80px 0 60px;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 1.05rem;
    }

    .section-title {
        font-size: 1.7rem;
    }

    .donate-section {
        padding: 32px 24px;
    }

    .warning-card {
        padding: 28px;
    }
}