/* =====================================================
   MONEY DIPLOMATIC - DOVETAIL STYLE DESIGN SYSTEM
   Modern, Clean, Light Mode First
   ===================================================== */

/* === CSS VARIABLES === */
:root {
    /* Colors - Light Mode */
    --color-bg-primary: #FFFFFF;
    --color-bg-secondary: #F9FAFB;
    --color-bg-tertiary: #F3F4F6;
    --color-bg-elevated: #FFFFFF;
    --color-bg-hover: #F3F4F6;
    --color-bg-active: rgba(99, 102, 241, 0.08);
    
    /* Text Colors */
    --color-text-primary: #111827;
    --color-text-secondary: #4B5563;
    --color-text-tertiary: #6B7280;
    --color-text-muted: #9CA3AF;
    --color-text-inverse: #FFFFFF;
    
    /* Brand Colors */
    --color-brand-primary: #6366F1;
    --color-brand-primary-hover: #4F46E5;
    --color-brand-secondary: #8B5CF6;
    --color-brand-accent: #F59E0B;
    --color-brand-light: #EEF2FF;
    
    /* Semantic Colors */
    --color-success: #10B981;
    --color-success-light: #D1FAE5;
    --color-warning: #F59E0B;
    --color-warning-light: #FEF3C7;
    --color-error: #EF4444;
    --color-error-light: #FEE2E2;
    --color-info: #3B82F6;
    --color-info-light: #DBEAFE;
    
    /* Borders */
    --color-border-primary: #E5E7EB;
    --color-border-secondary: #F3F4F6;
    --color-border-focus: #6366F1;
    
    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-colored: 0 4px 14px rgba(99, 102, 241, 0.25);
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
    
    /* Font Sizes */
    --text-xs: 0.75rem;      /* 12px */
    --text-sm: 0.875rem;     /* 14px */
    --text-base: 1rem;       /* 16px */
    --text-lg: 1.125rem;     /* 18px */
    --text-xl: 1.25rem;      /* 20px */
    --text-2xl: 1.5rem;      /* 24px */
    --text-3xl: 1.875rem;    /* 30px */
    --text-4xl: 2.25rem;     /* 36px */
    --text-5xl: 3rem;        /* 48px */
    --text-6xl: 3.75rem;     /* 60px */
    --text-7xl: 4.5rem;      /* 72px */
    
    /* Line Heights */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;
    
    /* Letter Spacing */
    --tracking-tighter: -0.05em;
    --tracking-tight: -0.025em;
    --tracking-normal: 0;
    --tracking-wide: 0.025em;
    --tracking-wider: 0.05em;
    
    /* Spacing */
    --space-0: 0;
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */
    --space-16: 4rem;     /* 64px */
    --space-20: 5rem;     /* 80px */
    --space-24: 6rem;     /* 96px */
    --space-32: 8rem;     /* 128px */
    
    /* Border Radius */
    --radius-none: 0;
    --radius-sm: 0.25rem;    /* 4px */
    --radius-md: 0.375rem;   /* 6px */
    --radius-lg: 0.5rem;     /* 8px */
    --radius-xl: 0.75rem;    /* 12px */
    --radius-2xl: 1rem;      /* 16px */
    --radius-3xl: 1.5rem;    /* 24px */
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    --transition-slower: 500ms ease;
    
    /* Container */
    --container-max: 1280px;
    --container-wide: 1440px;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
}

a {
    color: inherit;
    text-decoration: none;
}

img, video {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
}

ul, ol {
    list-style: none;
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: var(--leading-tight);
    color: var(--color-text-primary);
}

h1 { font-size: var(--text-5xl); letter-spacing: var(--tracking-tight); }
h2 { font-size: var(--text-4xl); letter-spacing: var(--tracking-tight); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

.text-gradient {
    background: linear-gradient(135deg, var(--color-brand-primary) 0%, var(--color-brand-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* === LAYOUT === */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-6);
    padding-right: var(--space-6);
}

.container--wide {
    max-width: var(--container-wide);
}

.section {
    padding-top: var(--space-24);
    padding-bottom: var(--space-24);
}

.section--sm {
    padding-top: var(--space-16);
    padding-bottom: var(--space-16);
}

.section--lg {
    padding-top: var(--space-32);
    padding-bottom: var(--space-32);
}

/* === BUTTONS === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-sm);
    font-weight: 500;
    line-height: 1;
    border-radius: var(--radius-lg);
    border: 1px solid transparent;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn--primary {
    background: var(--color-brand-primary);
    color: var(--color-text-inverse);
    border-color: var(--color-brand-primary);
}

.btn--primary:hover {
    background: var(--color-brand-primary-hover);
    border-color: var(--color-brand-primary-hover);
    box-shadow: var(--shadow-colored);
    transform: translateY(-1px);
}

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

.btn--secondary:hover {
    background: var(--color-bg-secondary);
    border-color: var(--color-text-tertiary);
}

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

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

.btn--lg {
    padding: var(--space-4) var(--space-6);
    font-size: var(--text-base);
    border-radius: var(--radius-xl);
}

.btn--sm {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
}

.btn--pill {
    border-radius: var(--radius-full);
}

/* === CARDS === */
.card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-2xl);
    padding: var(--space-6);
    transition: all var(--transition-base);
}

.card:hover {
    border-color: var(--color-border-focus);
    box-shadow: var(--shadow-lg);
}

.card--flat {
    border: none;
    background: var(--color-bg-secondary);
}

.card--elevated {
    border: none;
    box-shadow: var(--shadow-lg);
}

/* === BADGES === */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: 500;
    border-radius: var(--radius-full);
    background: var(--color-brand-light);
    color: var(--color-brand-primary);
}

.badge--success {
    background: var(--color-success-light);
    color: var(--color-success);
}

.badge--warning {
    background: var(--color-warning-light);
    color: var(--color-warning);
}

.badge--outline {
    background: transparent;
    border: 1px solid var(--color-border-primary);
    color: var(--color-text-secondary);
}

/* === INPUTS === */
.input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.input:focus {
    outline: none;
    border-color: var(--color-brand-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.input::placeholder {
    color: var(--color-text-muted);
}

.input--lg {
    padding: var(--space-4) var(--space-5);
    font-size: var(--text-lg);
    border-radius: var(--radius-2xl);
}

/* === NAVIGATION === */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-secondary);
}

.nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-text-primary);
}

.nav__logo-icon {
    width: 32px;
    height: 32px;
    background: var(--color-brand-primary);
    color: white;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-sm);
    font-weight: 700;
}

.nav__links {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.nav__link {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.nav__link:hover {
    color: var(--color-text-primary);
    background: var(--color-bg-hover);
}

.nav__link--active {
    color: var(--color-brand-primary);
    background: var(--color-bg-active);
}

.nav__actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

/* === HERO === */
.hero {
    padding-top: calc(64px + var(--space-20));
    padding-bottom: var(--space-20);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero__badge {
    margin-bottom: var(--space-6);
}

.hero__title {
    font-size: clamp(var(--text-4xl), 5vw, var(--text-6xl));
    font-weight: 600;
    line-height: 1.1;
    margin-bottom: var(--space-6);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.hero__subtitle {
    font-size: var(--text-xl);
    color: var(--color-text-secondary);
    max-width: 640px;
    margin: 0 auto var(--space-10);
    line-height: var(--leading-relaxed);
}

.hero__actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    flex-wrap: wrap;
    margin-bottom: var(--space-16);
}

.hero__image {
    max-width: 1100px;
    margin: 0 auto;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    overflow: hidden;
    border: 1px solid var(--color-border-primary);
}

.hero__image img {
    width: 100%;
    height: auto;
}

/* === SECTION HEADERS === */
.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto var(--space-16);
}

.section-header__badge {
    margin-bottom: var(--space-4);
}

.section-header__title {
    font-size: var(--text-4xl);
    margin-bottom: var(--space-4);
}

.section-header__subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
}

/* === FEATURE GRID === */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

.feature-card {
    padding: var(--space-8);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-2xl);
    transition: all var(--transition-base);
}

.feature-card:hover {
    background: var(--color-bg-primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.feature-card__icon {
    width: 48px;
    height: 48px;
    background: var(--color-brand-light);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-5);
    font-size: var(--text-xl);
    color: var(--color-brand-primary);
}

.feature-card__title {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.feature-card__description {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    line-height: var(--leading-relaxed);
}

/* === TESTIMONIALS === */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

@media (max-width: 1024px) {
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
}

.testimonial-card {
    padding: var(--space-6);
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-2xl);
}

.testimonial-card__stars {
    display: flex;
    gap: 2px;
    margin-bottom: var(--space-4);
    color: var(--color-brand-accent);
}

.testimonial-card__text {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-6);
}

.testimonial-card__author {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.testimonial-card__avatar {
    width: 40px;
    height: 40px;
    background: var(--color-brand-light);
    color: var(--color-brand-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-sm);
    font-weight: 600;
}

.testimonial-card__name {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-primary);
}

.testimonial-card__role {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

/* === PRICING === */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
    max-width: 900px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .pricing-grid {
        grid-template-columns: 1fr;
    }
}

.pricing-card {
    padding: var(--space-8);
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-2xl);
    position: relative;
}

.pricing-card--featured {
    border-color: var(--color-brand-primary);
    box-shadow: var(--shadow-colored);
}

.pricing-card__badge {
    position: absolute;
    top: calc(-1 * var(--space-3));
    left: 50%;
    transform: translateX(-50%);
}

.pricing-card__name {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.pricing-card__description {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-6);
}

.pricing-card__price {
    display: flex;
    align-items: baseline;
    gap: var(--space-1);
    margin-bottom: var(--space-6);
}

.pricing-card__currency {
    font-size: var(--text-xl);
    color: var(--color-text-tertiary);
}

.pricing-card__amount {
    font-size: var(--text-5xl);
    font-weight: 600;
    color: var(--color-text-primary);
}

.pricing-card__period {
    font-size: var(--text-base);
    color: var(--color-text-tertiary);
}

.pricing-card__features {
    margin-bottom: var(--space-8);
}

.pricing-card__feature {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-3) 0;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.pricing-card__feature i {
    color: var(--color-success);
    margin-top: 2px;
}

/* === FAQ === */
.faq-list {
    max-width: 768px;
    margin: 0 auto;
}

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

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

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) 0;
    background: none;
    border: none;
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--color-text-primary);
    text-align: left;
    cursor: pointer;
}

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

.faq-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    transition: transform var(--transition-base);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
    color: var(--color-brand-primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer__content {
    padding-bottom: var(--space-5);
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

/* === CTA SECTION === */
.cta-section {
    text-align: center;
    padding: var(--space-20) var(--space-6);
    background: linear-gradient(135deg, var(--color-brand-light) 0%, rgba(139, 92, 246, 0.1) 100%);
    border-radius: var(--radius-3xl);
}

.cta-section__title {
    font-size: var(--text-4xl);
    margin-bottom: var(--space-4);
}

.cta-section__subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

/* === FOOTER === */
.footer {
    padding: var(--space-16) 0 var(--space-8);
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border-primary);
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

@media (max-width: 768px) {
    .footer__grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
}

.footer__brand {
    max-width: 280px;
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-4);
}

.footer__description {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    line-height: var(--leading-relaxed);
}

.footer__column-title {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
}

.footer__links {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer__link {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    transition: color var(--transition-fast);
}

.footer__link:hover {
    color: var(--color-brand-primary);
}

.footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border-primary);
}

.footer__copyright {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.footer__socials {
    display: flex;
    gap: var(--space-4);
}

.footer__social {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-tertiary);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.footer__social:hover {
    color: var(--color-brand-primary);
    background: var(--color-bg-hover);
}

/* === UTILITIES === */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }

.hidden { display: none; }

@media (max-width: 768px) {
    .md\:hidden { display: none; }
}

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

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-delay-100 { animation-delay: 100ms; }
.animate-delay-200 { animation-delay: 200ms; }
.animate-delay-300 { animation-delay: 300ms; }