/* ==========================================================================
   VNSH - Simplified Purchase Interface
   Clean, focused design with single product box
   ========================================================================== */

:root {
    --bg-base: #0c0c0e;
    --bg-elevated: #141416;
    --bg-surface: #1a1a1e;
    --bg-hover: #222228;

    --text-primary: #f0f0f2;
    --text-secondary: #a0a0a8;
    --text-muted: #6a6a72;

    --accent: #22d3ee;
    --accent-dim: rgba(34, 211, 238, 0.15);
    --accent-secondary: #a78bfa;

    --warning: #fbbf24;
    --warning-dim: rgba(251, 191, 36, 0.1);

    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    --border-accent: rgba(34, 211, 238, 0.3);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;

    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, monospace;
}

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

.hidden {
    display: none !important;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Glow Effects */
.glow {
    position: fixed;
    pointer-events: none;
    z-index: -1;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.35;
}

.glow-1 {
    top: -20%;
    left: -10%;
    width: 50%;
    height: 50%;
    background: radial-gradient(circle, rgba(34, 211, 238, 0.12) 0%, transparent 70%);
}

.glow-2 {
    bottom: -20%;
    right: -10%;
    width: 40%;
    height: 40%;
    background: radial-gradient(circle, rgba(167, 139, 250, 0.1) 0%, transparent 70%);
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1rem 0;
    background: rgba(12, 12, 14, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 1.25rem;
    color: var(--accent);
}

.logo-text {
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: 0.12em;
}

nav {
    display: flex;
    gap: 2rem;
}

nav a {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* Hero Section - Two Column Layout */
.hero {
    padding: 6rem 0 4rem;
    min-height: 100vh;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 4rem;
    align-items: start;
    padding-top: 2rem;
}

/* Left Column - Brand + How It Works */
.hero-left {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.hero-brand {
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.logo-icon.large {
    font-size: 2.5rem;
    color: var(--accent);
}

.logo-text.large {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: 0.12em;
}

.brand-tagline {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* How It Works - Inline */
.how-it-works h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.5rem;
}

.step {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.step:last-child {
    margin-bottom: 0;
}

.step-num {
    width: 28px;
    height: 28px;
    min-width: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-dim);
    border: 1px solid var(--border-accent);
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent);
}

.step-content h3 {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.step-content p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Right Column */
.hero-right {
    position: sticky;
    top: 6rem;
}

h1 {
    font-size: clamp(2.25rem, 5vw, 3.25rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

/* Purchase Box */
.purchase-box {
    background: var(--bg-elevated);
    border: 1px solid var(--accent);
    border-radius: var(--radius-xl);
    padding: 2rem;
}

.purchase-header {
    text-align: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.purchase-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.purchase-header p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.purchase-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-group select {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--bg-base);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9375rem;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236a6a72' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    transition: border-color var(--transition-fast);
}

.form-group select:hover,
.form-group select:focus {
    border-color: var(--border-hover);
    outline: none;
}

.form-group select:focus {
    border-color: var(--accent);
}

.form-group select option {
    background: var(--bg-base);
    color: var(--text-primary);
    padding: 0.5rem;
}

/* PGP Key Input */
.pgp-group {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.pgp-checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
}

.pgp-checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
    cursor: pointer;
}

.pgp-checkbox-text {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.pgp-key-container {
    margin-top: 0.75rem;
}

.pgp-group textarea {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-base);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    resize: vertical;
    min-height: 80px;
    transition: border-color var(--transition-fast);
}

.pgp-group textarea:hover,
.pgp-group textarea:focus {
    border-color: var(--border-hover);
    outline: none;
}

.pgp-group textarea:focus {
    border-color: var(--accent);
}

.pgp-group textarea::placeholder {
    color: var(--text-muted);
    opacity: 0.5;
}

.field-hint {
    font-size: 0.6875rem;
    color: var(--accent);
    margin-top: 0.375rem;
    margin-bottom: 0;
}

/* Help Toggle Button */
.help-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    margin-left: 0.5rem;
    padding: 0;
    background: transparent;
    border: 1px solid var(--text-muted);
    border-radius: 50%;
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    vertical-align: middle;
}

.help-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.help-expand {
    margin-top: 0.75rem;
    padding: 0.875rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* Inline Payment Display */
.payment-display {
    text-align: center;
}

.payment-header-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.payment-method-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.payment-amount-usd {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
}

.payment-qr {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 1rem;
    display: inline-block;
    margin-bottom: 1.5rem;
}

.payment-qr canvas {
    display: block;
}

.payment-details {
    background: var(--bg-base);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    margin-bottom: 1rem;
    text-align: center;
}

.payment-amount,
.payment-address {
    margin-bottom: 1rem;
}

.payment-address {
    margin-bottom: 0;
}

.payment-label {
    display: block;
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.payment-value {
    display: block;
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent);
    word-break: break-all;
    overflow-wrap: anywhere;
    background: transparent;
    padding: 0;
    line-height: 1.5;
}

.payment-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin: 1.5rem 0 1rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.payment-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.btn-link {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    padding: 0.625rem 1rem;
    transition: all var(--transition-fast);
}

.btn-link:hover {
    color: var(--text-primary);
    border-color: var(--border-hover);
    background: var(--bg-base);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
}

.btn-cancel {
    width: 100%;
    margin-top: 0.5rem;
}

/* Invoice ID Display */
.invoice-id-row {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 0.75rem;
}

.invoice-id-label {
    color: var(--text-muted);
}

.invoice-id-value {
    font-family: var(--font-mono);
    color: var(--text-secondary);
    font-size: 0.6875rem;
    background: transparent;
}

/* eSIM Result Display */
.esim-result {
    text-align: center;
}

.esim-result-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--accent);
}

.esim-result-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.esim-qr {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 1.25rem;
    display: inline-block;
    margin-bottom: 1.5rem;
}

.esim-qr canvas {
    display: block;
}

.esim-lpa-code {
    background: var(--bg-base);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-bottom: 1rem;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    word-break: break-all;
    overflow-wrap: anywhere;
    color: var(--text-secondary);
    text-align: left;
    line-height: 1.5;
}

.esim-encrypted-notice {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid #10b981;
    border-radius: var(--radius-md);
    padding: 0.75rem;
    margin-bottom: 1rem;
    font-size: 0.8125rem;
    color: #10b981;
}

.esim-pgp-output {
    background: var(--bg-base);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-bottom: 1rem;
    font-family: var(--font-mono);
    font-size: 0.5625rem;
    line-height: 1.4;
    color: var(--text-secondary);
    text-align: left;
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 250px;
    overflow-y: auto;
}

.esim-warning {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid #ef4444;
    border-radius: var(--radius-md);
    padding: 0.75rem;
    margin-top: 1rem;
    font-size: 0.8125rem;
    color: #ef4444;
    text-align: center;
}

.esim-result .btn-primary {
    width: 100%;
}

/* Tor Access Section (Clearnet only) */
.tor-access {
    text-align: center;
    padding: 1rem 0;
}

.onion-address {
    background: var(--bg-base);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.onion-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.onion-url {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    word-break: break-all;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.onion-url:hover {
    background: var(--accent-dim);
}

.onion-url.copied::after {
    content: ' (copied!)';
    color: var(--text-muted);
}

.tor-btn {
    width: 100%;
    margin-bottom: 1rem;
}

.tor-hint {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.tor-hint a {
    color: var(--accent);
    text-decoration: none;
}

.tor-hint a:hover {
    text-decoration: underline;
}

/* Info Rows (Networks, Speed) */
.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.625rem 0;
    border-bottom: 1px solid var(--border);
}

.info-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-value {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Price Display */
.price-display {
    background: var(--bg-base);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1rem;
    margin: 0.5rem 0;
}

.price-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
}

.price-row:not(:last-child) {
    border-bottom: 1px solid var(--border);
}

.price-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.price-value {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.price-row.total {
    padding-top: 0.75rem;
}

.price-row.total .price-label {
    font-weight: 600;
    color: var(--text-secondary);
}

.price-row.total .price-value {
    font-size: 1.5rem;
    color: var(--accent);
}

/* Inventory Badge */
.inventory-badge {
    font-weight: 700;
}

.inventory-badge.in-stock {
    color: #22c55e;
}

.inventory-badge.low-stock {
    color: var(--warning);
}

.inventory-badge.out-of-stock {
    color: #ef4444;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-base);
}

.btn-primary:hover {
    background: #2ee4fc;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(34, 211, 238, 0.3);
}

.btn-primary.disabled,
.btn-secondary.disabled {
    background: var(--bg-hover);
    color: var(--text-muted);
    cursor: not-allowed;
    pointer-events: none;
}

.btn-secondary {
    background: var(--bg-surface);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

/* Payment Buttons */
.payment-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.payment-buttons .btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.crypto-icon {
    width: 20px;
    height: 20px;
}

.btn-btc {
    background: linear-gradient(135deg, #f7931a 0%, #e8820e 100%);
    color: #fff;
}

.btn-btc:hover {
    background: linear-gradient(135deg, #ffa426 0%, #f7931a 100%);
    box-shadow: 0 4px 20px rgba(247, 147, 26, 0.3);
}

.btn-xmr {
    background: linear-gradient(135deg, #ff6600 0%, #e55c00 100%);
    color: #fff;
    border: none;
}

.btn-xmr:hover {
    background: linear-gradient(135deg, #ff7a1a 0%, #ff6600 100%);
    box-shadow: 0 4px 20px rgba(255, 102, 0, 0.3);
}

.btn-lg {
    padding: 1rem 1.5rem;
    font-size: 1rem;
}

.purchase-note {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 0.5rem;
}

.purchase-note svg {
    width: 14px;
    height: 14px;
    color: var(--accent);
    flex-shrink: 0;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-tag {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 0.75rem;
}

.section-header h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    letter-spacing: -0.01em;
}

/* FAQ Section */
.faq {
    padding: 5rem 0;
}

.faq-grid {
    max-width: 640px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.faq-item {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.faq-item summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    cursor: pointer;
    list-style: none;
    font-size: 0.9375rem;
    font-weight: 500;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-toggle {
    font-size: 1.25rem;
    color: var(--text-muted);
    transition: transform var(--transition-fast);
}

.faq-item[open] .faq-toggle {
    transform: rotate(45deg);
}

.faq-item[open] {
    border-color: var(--border-accent);
}

.faq-item p {
    padding: 0 1.25rem 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Footer */
footer {
    padding: 3rem 0 1.5rem;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.footer-brand p {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    text-decoration: none;
}

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

.footer-verify {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    font-size: 0.75rem;
}

.footer-verify a {
    color: var(--accent);
    text-decoration: none;
}

.footer-verify a:hover {
    text-decoration: underline;
}

.verify-hash {
    font-family: var(--font-mono);
    color: var(--text-muted);
    font-size: 0.6875rem;
    cursor: pointer;
}

.verify-hash:hover {
    color: var(--text-secondary);
}

.footer-bottom {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.footer-bottom .dot {
    width: 3px;
    height: 3px;
    background: var(--text-muted);
    border-radius: 50%;
    opacity: 0.5;
}

/* Responsive */
@media (max-width: 900px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .hero-left {
        order: 2;
    }

    .hero-right {
        order: 1;
        position: static;
    }

    .purchase-box {
        max-width: 400px;
        margin: 0 auto;
    }

    .hero-brand {
        text-align: center;
    }

    .brand-logo {
        justify-content: center;
    }
}

@media (max-width: 600px) {
    .hero {
        padding: 5rem 0 3rem;
        min-height: auto;
    }

    .logo-icon.large {
        font-size: 2rem;
    }

    .logo-text.large {
        font-size: 2rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 0.5rem;
    }

    .footer-bottom .dot {
        display: none;
    }

    nav {
        gap: 1rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}