:root {
    /* Colors from DESIGN.md */
    --color-background: #121316;
    --color-surface: #121316;
    --color-surface-dim: #121316;
    --color-surface-bright: #38393c;
    --color-surface-container-lowest: #0d0e11;
    --color-surface-container-low: #1a1b1e;
    --color-surface-container: #1e2022;
    --color-surface-container-high: #292a2d;
    --color-surface-container-highest: #343538;
    --color-on-surface: #e3e2e6;
    --color-on-surface-variant: #c2c6d5;
    --color-outline: #8c909f;
    --color-outline-variant: #424753;
    
    --color-primary: #adc6ff;
    --color-on-primary: #002e69;
    --color-primary-container: #4d8efe;
    --color-on-primary-container: #00285c;
    --color-secondary: #b4c5ff;
    --color-tertiary: #ffb780;
    --color-neon-glow: #4285F4;
    --color-text-primary: #FFFFFF;
    --color-text-secondary: #9AA0A6;
    
    /* Border Radii */
    --radius-sm: 0.25rem;
    --radius-default: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Layout & Spacing */
    --spacing-unit: 8px;
}

/* Reset & Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--color-background);
    color: var(--color-on-background);
    font-family: 'Hanken Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    display: flex;
    justify-content: center;
    min-height: 100vh;
    line-height: 1.5;
}

/* Background for screen > 500px */
@media (min-width: 501px) {
    body {
        background-image: linear-gradient(rgba(18, 19, 22, -0.05), rgba(18, 19, 22, 0.15)), 
                          var(--bg-image-url);
        background-size: cover;
        background-position: center;
        background-attachment: fixed;
    }
}

/* Core container limited to 500px */
.app-container {
    width: 100%;
    max-width: 500px;
    background-color: var(--color-background);
    min-height: 100vh;
    border-left: 1px solid rgba(255, 255, 255, 0.08);
    border-right: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    flex-direction: column;
    position: relative;
    padding-bottom: 80px; /* Leave space for bottom nav/CTA */
}

/* Floating Blurred Navigation */
.nav-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(18, 19, 22, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 16px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: 'Sora', sans-serif;
    font-weight: 800;
    font-size: 18px;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-logo-dot {
    width: 8px;
    height: 8px;
    background-color: var(--color-primary-container);
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 8px var(--color-neon-glow);
}

.nav-btn {
    font-family: 'Sora', sans-serif;
    font-size: 13px;
    font-weight: 600;
    color: #FFFFFF;
    background-color: #06C755;
    text-decoration: none;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    transition: all 0.2s ease;
    box-shadow: 0 2px 10px rgba(6, 199, 85, 0.2);
}

.nav-btn:hover {
    transform: translateY(-1px);
    background-color: #05b04b;
    box-shadow: 0 4px 15px rgba(6, 199, 85, 0.4);
}

/* Main Content wrapper */
.content {
    padding: 24px 20px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

/* Hero Section */
.hero {
    display: flex;
    flex-direction: column;
    gap: 12px;
    text-align: center;
    padding: 20px 0 10px 0;
}

.chip-mono {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary);
    background: rgba(77, 142, 254, 0.1);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    align-self: center;
    border: 1px solid rgba(77, 142, 254, 0.2);
    letter-spacing: 0.05em;
}

.hero-title {
    font-family: 'Sora', sans-serif;
    font-size: 32px;
    font-weight: 800;
    line-height: 1.2;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

.hero-gradient-text {
    background: linear-gradient(135deg, #ffffff 30%, #adc6ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    font-size: 15px;
    color: var(--color-text-secondary);
    max-width: 90%;
    margin: 0 auto;
}

/* Glassmorphic Cards */
.glass-card {
    background: rgba(30, 32, 34, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    padding: 20px;
    position: relative;
    overflow: hidden;
    transition: border-color 0.3s ease;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0.05) 50%, rgba(255,255,255,0) 100%);
}

.glass-card:hover {
    border-color: rgba(77, 142, 254, 0.3);
}

/* Section Headings */
.section-title {
    font-family: 'Sora', sans-serif;
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-title-icon {
    width: 4px;
    height: 18px;
    background-color: var(--color-primary-container);
    border-radius: var(--radius-full);
    display: inline-block;
}

/* Domain Search & Interactive Calculator */
.calc-header {
    margin-bottom: 16px;
}

.calc-subtitle {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-top: 4px;
}

.input-group {
    display: flex;
    background: var(--color-surface-container-low);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: 4px;
    margin-bottom: 16px;
    transition: all 0.3s ease;
}

.input-group:focus-within {
    border-color: var(--color-primary-container);
    box-shadow: 0 0 10px rgba(66, 133, 244, 0.25);
}

.domain-input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--color-text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 16px;
    padding: 10px 12px;
    flex: 1;
    min-width: 0;
}

.domain-select {
    background: var(--color-surface-container-high);
    border: none;
    outline: none;
    color: var(--color-text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 15px;
    font-weight: 600;
    padding: 0 16px;
    border-radius: var(--radius-default);
    cursor: pointer;
    transition: background 0.2s ease;
}

.domain-select:hover {
    background: var(--color-surface-container-highest);
}

/* Toggle Options */
.option-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
}

.option-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background: var(--color-surface-container-lowest);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 12px 14px;
    border-radius: var(--radius-default);
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.option-item:hover {
    background: rgba(255, 255, 255, 0.02);
    border-color: rgba(255, 255, 255, 0.1);
}

.option-checkbox {
    appearance: none;
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-outline);
    border-radius: var(--radius-sm);
    margin-top: 2px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.option-checkbox:checked {
    background-color: var(--color-primary-container);
    border-color: var(--color-primary-container);
    box-shadow: 0 0 8px rgba(66, 133, 244, 0.5);
}

.option-checkbox:checked::after {
    content: '✓';
    color: #121316;
    font-size: 13px;
    font-weight: 800;
}

.option-item.active {
    border-color: rgba(77, 142, 254, 0.4);
    background: rgba(77, 142, 254, 0.04);
}

.option-info {
    flex: 1;
}

.option-title-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2px;
}

.option-name {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-text-primary);
}

.option-price {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
}

.option-desc {
    font-size: 12px;
    color: var(--color-text-secondary);
    line-height: 1.4;
}

/* Result display */
.calc-result {
    background: var(--color-surface-container-low);
    border-radius: var(--radius-md);
    padding: 16px;
    border: 1px dashed rgba(255, 255, 255, 0.1);
}

.calc-line {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}

.calc-line.total {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 12px;
    margin-top: 8px;
    margin-bottom: 0;
    font-size: 16px;
    font-weight: 700;
    color: var(--color-text-primary);
}

.calc-total-val {
    font-family: 'Sora', sans-serif;
    font-size: 20px;
    color: var(--color-tertiary);
    font-weight: 800;
}

.calc-discount-badge {
    background: #ffb4ab;
    color: #690005;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 6px;
    vertical-align: middle;
    display: inline-block;
}

.calc-notice {
    font-size: 12px;
    color: var(--color-text-secondary);
    text-align: center;
    margin-top: 12px;
}

/* Pricing Table Column Card */
.pricing-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.pricing-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    background: var(--color-surface-container-low);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.2s ease;
}

.pricing-row:hover {
    border-color: rgba(255, 255, 255, 0.1);
    background: var(--color-surface-container);
}

.pricing-tld {
    font-family: 'Sora', sans-serif;
    font-weight: 700;
    font-size: 18px;
    color: var(--color-text-primary);
}

.pricing-details {
    text-align: right;
}

.pricing-original {
    font-size: 12px;
    color: var(--color-text-secondary);
    text-decoration: line-through;
    margin-right: 6px;
}

.pricing-current {
    font-family: 'JetBrains Mono', monospace;
    font-size: 16px;
    font-weight: 700;
    color: var(--color-primary);
}

.pricing-current-label {
    font-size: 12px;
    color: var(--color-text-secondary);
    margin-top: 2px;
}

/* Services detail cards */
.service-details {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.service-card {
    background: rgba(26, 27, 30, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: 16px;
}

.service-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 10px;
}

.service-card-title {
    font-family: 'Sora', sans-serif;
    font-size: 15px;
    font-weight: 700;
    color: var(--color-text-primary);
}

.service-card-price {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-tertiary);
    background: rgba(255, 183, 128, 0.1);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    border: 1px solid rgba(255, 183, 128, 0.2);
}

.service-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.service-feature-item {
    font-size: 13px;
    color: var(--color-text-secondary);
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.service-feature-item::before {
    content: '•';
    color: var(--color-primary-container);
    font-weight: 900;
    font-size: 16px;
    line-height: 1;
    margin-top: 1px;
}

/* DNS Setup section */
.dns-card {
    border: 1px solid rgba(255, 183, 128, 0.2);
    background: rgba(219, 118, 15, 0.03);
}

.dns-badge {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    background: rgba(219, 118, 15, 0.15);
    color: var(--color-tertiary);
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
    border: 1px solid rgba(219, 118, 15, 0.3);
}

/* Sticky Bottom CTA bar */
.bottom-cta {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 500px;
    background: rgba(18, 19, 22, 0.9);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 12px 20px 8px 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    box-shadow: 0 -4px 20px rgba(0,0,0,0.5);
    z-index: 99;
}

.bottom-cta-buttons {
    display: flex;
    width: 100%;
    align-items: center;
    gap: 8px;
}

.bottom-cta-info {
    font-size: 11px;
    color: var(--color-text-secondary);
    text-align: center;
    font-weight: 500;
    letter-spacing: 0.05em;
}

.cta-separator {
    color: var(--color-text-secondary);
    font-size: 13px;
    font-weight: 700;
    white-space: nowrap;
    align-self: center;
}

.cta-btn-line {
    flex: 1;
    background-color: #06C755; /* LINE green */
    color: #FFFFFF;
    font-family: 'Sora', sans-serif;
    font-weight: 700;
    font-size: 13px;
    text-align: center;
    text-decoration: none;
    padding: 12px 8px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: font-size 0.15s ease-out, background-color 0.2s ease, box-shadow 0.2s ease;
    border: none;
    cursor: pointer;
    white-space: nowrap;
}

.cta-btn-line img {
    transition: width 0.15s ease-out, height 0.15s ease-out;
}

.cta-btn-line:hover {
    background-color: #05b04b;
    box-shadow: 0 4px 15px rgba(6, 199, 85, 0.3);
}

.cta-btn-secondary {
    flex: 1.2;
    background-color: var(--color-surface-container-high);
    color: var(--color-text-primary);
    border: 1px solid rgba(255,255,255,0.1);
    font-family: 'Sora', sans-serif;
    font-weight: 600;
    font-size: 13px;
    padding: 12px 8px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: font-size 0.15s ease-out, background-color 0.2s ease, box-shadow 0.2s ease;
    text-align: center;
    white-space: nowrap;
}

.cta-btn-secondary:hover {
    background-color: var(--color-surface-container-highest);
}

/* Dialog / Modal for Copy Confirmation */
.toast {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--color-surface-container-highest);
    color: var(--color-text-primary);
    padding: 10px 20px;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
    border: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    pointer-events: none;
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Helper Styles */
.highlight-text {
    color: var(--color-primary);
}