/* ==================== CSS Variables ==================== */
:root {
    /* Light Theme Colors */
    --color-bg: #ffffff;
    --color-surface: #fafafa;
    --color-surface-elevated: #ffffff;
    --color-text: #0a0a0a;
    --color-text-secondary: #525252;
    --color-text-tertiary: #737373;
    --color-border: #e5e5e5;
    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-info: #3b82f6;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.12);
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme */
[data-theme="dark"] {
    --color-bg: #0a0a0a;
    --color-surface: #171717;
    --color-surface-elevated: #262626;
    --color-text: #fafafa;
    --color-text-secondary: #a3a3a3;
    --color-text-tertiary: #737373;
    --color-border: #262626;
    --color-accent: #3b82f6;
    --color-accent-hover: #60a5fa;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.6);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    transition: background var(--transition-base), color var(--transition-base), opacity 200ms ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html.pricing-pending #priceSaleCard {
    display: none;
}

/* ==================== Top Controls ==================== */
.top-controls {
    position: fixed;
    top: var(--spacing-md);
    right: var(--spacing-md);
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.theme-toggle {
    width: 48px;
    height: 48px;
    border: 1px solid var(--color-border);
    background: var(--color-surface-elevated);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.theme-toggle:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.theme-toggle:active {
    transform: translateY(0);
}

[data-theme="light"] .icon-moon {
    display: block;
}

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

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

[data-theme="dark"] .icon-sun {
    display: block;
}

.language-switcher {
    display: inline-flex;
    align-items: center;
}

.language-select {
    appearance: none;
    border: 1px solid var(--color-border);
    background: var(--color-surface-elevated);
    color: var(--color-text);
    border-radius: var(--radius-full);
    padding: 0.6rem 2rem 0.6rem 1rem;
    font-size: var(--font-size-sm);
    font-weight: 600;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    cursor: pointer;
}

.language-select:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.language-select:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.language-switcher::after {
    content: "▾";
    position: relative;
    margin-left: -1.5rem;
    color: var(--color-text-secondary);
    pointer-events: none;
    font-size: var(--font-size-xs);
}

.page-fade-out {
    opacity: 0;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* ==================== Container ==================== */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ==================== Hero Section ==================== */
.hero {
    padding: var(--spacing-xl) 0 var(--spacing-md);
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease-out forwards;
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.025em;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* ==================== Buttons ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-base);
    border: 1px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: var(--color-accent);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background: var(--color-surface-elevated);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0);
}

/* ==================== Sections ==================== */
.pricing-section,
.faq-section {
    padding: var(--spacing-lg) 0;
    opacity: 0;
    transform: translateY(20px);
}

.pricing-section.visible,
.faq-section.visible {
    animation: fadeInUp 0.6s ease-out forwards;
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.section-intro {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-md);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* ==================== Badges ==================== */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    line-height: 1;
}

.badge-accent {
    background: rgba(37, 99, 235, 0.1);
    color: var(--color-accent);
}

.badge-highlight {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
}

/* ==================== Price Cards ==================== */
.price-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.price-cards.is-single {
    grid-template-columns: minmax(0, 1fr);
    justify-items: center;
}

.price-cards.is-single .price-card {
    width: 420px;
    max-width: 420px;
    margin-left: auto;
    margin-right: auto;
}

.price-cards.is-single .price-amount {
    transform: translateX(-0.53rem);
}

.price-card {
    position: relative;
    padding: var(--spacing-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: all var(--transition-base);
}

.price-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.price-card-featured {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(16, 185, 129, 0.05) 100%);
    border-color: var(--color-accent);
}

.price-badge-wrap {
    position: absolute;
    top: -18px;
    left: 50%;
    transform: translateX(-50%);
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    z-index: 2;
}

.price-badge {
    position: relative;
    padding: 0.375rem 1rem;
    background: linear-gradient(135deg, #2563eb 0%, #10b981 100%);
    color: white;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    box-shadow: var(--shadow-md);
    animation: badgeGlow 2.6s ease-in-out infinite;
}

.price-period {
    padding: 0.25rem 0.75rem;
    background: rgba(15, 23, 42, 0.08);
    color: var(--color-text-secondary);
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    backdrop-filter: blur(6px);
    border: 1px solid rgba(37, 99, 235, 0.18);
    box-shadow: 0 6px 18px rgba(15, 23, 42, 0.12);
    animation: badgeSlideIn 0.6s ease both;
}

.price-card-featured .price-period-top {
    position: absolute;
    top: 10px;
    right: 10px;
    animation: badgeSlideIn 0.6s ease both;
}

@keyframes badgeGlow {
    0%,
    100% {
        box-shadow: 0 6px 18px rgba(37, 99, 235, 0.25);
        transform: translateY(0);
    }
    50% {
        box-shadow: 0 10px 24px rgba(16, 185, 129, 0.35);
        transform: translateY(-1px);
    }
}

@keyframes badgeSlideIn {
    from {
        opacity: 0;
        transform: translateY(-6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.price-header {
    margin-bottom: var(--spacing-sm);
}

.price-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-secondary);
}

.price-amount {
    display: flex;
    align-items: baseline;
    justify-content: center;
    margin-bottom: var(--spacing-xs);
}


.price-currency {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-right: 0.25rem;
}

.price-value {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.03em;
}

.price-tax {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    margin-bottom: var(--spacing-sm);
}

.price-discount {
    margin-top: var(--spacing-sm);
}

.discount-label {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--color-success);
    color: white;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 700;
}

/* ==================== Key Points ==================== */
.key-points {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.key-point {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.key-point-icon {
    flex-shrink: 0;
    color: var(--color-success);
    margin-top: 2px;
}

.key-point-text {
    flex: 1;
    font-size: var(--font-size-base);
    line-height: 1.7;
}

.reassurance-text {
    text-align: center;
    font-size: var(--font-size-lg);
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ==================== Notice Boxes ==================== */
.notice-box {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-sm);
    border: 1px solid;
}

.notice-warning {
    background: rgba(245, 158, 11, 0.05);
    border-color: rgba(245, 158, 11, 0.2);
}

.notice-info {
    background: rgba(59, 130, 246, 0.05);
    border-color: rgba(59, 130, 246, 0.2);
}

.notice-icon {
    flex-shrink: 0;
}

.notice-warning .notice-icon {
    color: var(--color-warning);
}

.notice-info .notice-icon {
    color: var(--color-info);
}

.notice-content {
    flex: 1;
}

.notice-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.notice-content p {
    font-size: var(--font-size-sm);
    line-height: 1.7;
    color: var(--color-text-secondary);
}

/* ==================== FAQ ==================== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

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

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    background: none;
    border: none;
    color: var(--color-text);
    font-size: var(--font-size-lg);
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition: color var(--transition-fast);
}

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

.faq-icon {
    flex-shrink: 0;
    transition: transform var(--transition-base);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    padding-bottom: var(--spacing-lg);
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition: max-height var(--transition-slow), opacity var(--transition-base), padding var(--transition-base);
}

.faq-answer:not([hidden]) {
    max-height: 500px;
    opacity: 1;
}

.faq-answer p {
    line-height: 1.8;
    color: var(--color-text-secondary);
}

.link {
    color: var(--color-accent);
    text-decoration: underline;
    transition: color var(--transition-fast);
}

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

/* ==================== Footer ==================== */
.footer {
    padding: var(--spacing-2xl) 0 var(--spacing-xl);
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-3xl);
    text-align: center;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.footer-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

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

.footer-copyright {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

/* ==================== Animations ==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== Responsive ==================== */
@media (max-width: 768px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .price-cards {
        grid-template-columns: 1fr;
    }
    
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
    
    .theme-toggle {
        top: var(--spacing-sm);
        right: var(--spacing-sm);
    }
    
    .notice-box {
        flex-direction: column;
    }
}

/* ==================== Accessibility ==================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}