/* ============================================
   MELO MARKETING WEBSITE - DESIGN SYSTEM
   Based on "The Radiant Academic" Design System
   ============================================ */

/* ===== CSS RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ===== DESIGN TOKENS ===== */
:root {
    /* Colors - Surface Philosophy */
    --surface: #f9f9fb;
    --surface-container-lowest: #ffffff;
    --surface-container-low: #f3f3f5;
    --surface-container: #eeeef0;
    --surface-container-high: #e8e8ea;
    --surface-container-highest: #e2e2e4;
    
    /* Primary Colors - Deep Rose */
    --primary: #b7004f;
    --primary-container: #e40a65;
    --on-primary: #ffffff;
    --on-primary-container: #3d0016;
    
    /* Secondary Colors - Vibrant Violet */
    --secondary: #9a25ae;
    --secondary-container: #ed76fd;
    --on-secondary: #ffffff;
    --on-secondary-container: #69007a;
    
    /* Tertiary - Purple for Safety/Verified */
    --tertiary: #652fe8;
    --tertiary-container: #e9ddff;
    --on-tertiary: #ffffff;
    --on-tertiary-container: #21005d;
    
    /* Text Colors */
    --on-surface: #1a1c1d;
    --on-surface-variant: #43474a;
    --outline: #73777a;
    --outline-variant: #c3c7ca;
    
    /* Spacing (Tailwind-inspired) */
    --spacing-1: 0.25rem;   /* 4px */
    --spacing-2: 0.5rem;    /* 8px */
    --spacing-3: 0.75rem;   /* 12px */
    --spacing-4: 1rem;      /* 16px */
    --spacing-5: 1.25rem;   /* 20px */
    --spacing-6: 1.5rem;    /* 24px */
    --spacing-8: 2rem;      /* 32px */
    --spacing-10: 2.5rem;   /* 40px */
    --spacing-12: 3rem;     /* 48px */
    --spacing-16: 4rem;     /* 64px */
    --spacing-20: 5rem;     /* 80px */
    --spacing-24: 6rem;     /* 96px */
    
    /* Border Radius */
    --radius-sm: 0.5rem;    /* 8px */
    --radius-default: 1rem; /* 16px */
    --radius-md: 1.5rem;    /* 24px */
    --radius-lg: 2rem;      /* 32px */
    --radius-full: 9999px;
    
    /* Typography Scale */
    --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Display */
    --display-lg-size: 3.5rem;      /* 56px */
    --display-lg-line: 1.15;
    --display-md-size: 2.75rem;     /* 44px */
    --display-md-line: 1.2;
    --display-sm-size: 2.25rem;     /* 36px */
    --display-sm-line: 1.25;
    
    /* Headline */
    --headline-lg-size: 2rem;       /* 32px */
    --headline-lg-line: 1.3;
    --headline-md-size: 1.5rem;     /* 24px */
    --headline-md-line: 1.35;
    --headline-sm-size: 1.25rem;    /* 20px */
    --headline-sm-line: 1.4;
    
    /* Body */
    --body-lg-size: 1.125rem;       /* 18px */
    --body-lg-line: 1.6;
    --body-md-size: 1rem;           /* 16px */
    --body-md-line: 1.6;
    --body-sm-size: 0.875rem;       /* 14px */
    --body-sm-line: 1.5;
    
    /* Label */
    --label-lg-size: 1rem;          /* 16px */
    --label-md-size: 0.875rem;      /* 14px */
    --label-sm-size: 0.75rem;       /* 12px */
}

/* ===== BASE STYLES ===== */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--surface);
    color: var(--on-surface);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== TYPOGRAPHY CLASSES ===== */
.display-lg {
    font-size: var(--display-lg-size);
    line-height: var(--display-lg-line);
    font-weight: 800;
    letter-spacing: -0.02em;
}

.display-md {
    font-size: var(--display-md-size);
    line-height: var(--display-md-line);
    font-weight: 800;
    letter-spacing: -0.01em;
}

.display-sm {
    font-size: var(--display-sm-size);
    line-height: var(--display-sm-line);
    font-weight: 700;
}

.headline-lg {
    font-size: var(--headline-lg-size);
    line-height: var(--headline-lg-line);
    font-weight: 700;
}

.headline-md {
    font-size: var(--headline-md-size);
    line-height: var(--headline-md-line);
    font-weight: 700;
}

.headline-sm {
    font-size: var(--headline-sm-size);
    line-height: var(--headline-sm-line);
    font-weight: 600;
}

.body-lg {
    font-size: var(--body-lg-size);
    line-height: var(--body-lg-line);
    font-weight: 400;
    color: var(--on-surface-variant);
}

.body-md {
    font-size: var(--body-md-size);
    line-height: var(--body-md-line);
    font-weight: 400;
    color: var(--on-surface-variant);
}

.body-sm {
    font-size: var(--body-sm-size);
    line-height: var(--body-sm-line);
    font-weight: 400;
    color: var(--on-surface-variant);
}

.label-md {
    font-size: var(--label-md-size);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05rem;
}

.label-sm {
    font-size: var(--label-sm-size);
    font-weight: 600;
    letter-spacing: 0.03rem;
}

/* ===== LAYOUT ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-4);
    }
}

/* ===== BUTTONS ===== */
.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-container) 100%);
    color: var(--on-primary);
    border: none;
    border-radius: var(--radius-full);
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--body-md-size);
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    opacity: 1;
    box-shadow: 0 0 0 rgba(183, 0, 79, 0);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(183, 0, 79, 0.3);
    opacity: 0.9;
}

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

/* ===== HERO SECTION ===== */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-16) 0;
    position: relative;
    overflow: hidden;
    background: #fef9fc;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(237, 118, 253, 0.12) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(228, 10, 101, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-12);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 560px;
}

.hero-content .logo {
    height: 48px;
    width: auto;
    margin-bottom: var(--spacing-6);
    display: inline-block;
    vertical-align: middle;
}

.badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--tertiary) 0%, #8b5cf6 100%);
    color: #ffffff;
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-full);
    font-size: var(--label-sm-size);
    font-weight: 700;
    letter-spacing: 0.05rem;
    margin-bottom: var(--spacing-6);
    margin-left: var(--spacing-6);
    box-shadow: 0 4px 12px rgba(101, 47, 232, 0.3);
    vertical-align: middle;
}

.hero h1 {
    margin-bottom: var(--spacing-5);
    color: var(--on-surface);
}

.hero .body-lg {
    margin-bottom: var(--spacing-8);
    max-width: 520px;
}

/* ===== WAITLIST FORM ===== */
.waitlist-form-container {
    margin-top: var(--spacing-8);
}

.waitlist-form {
    display: flex;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-3);
}

.email-input {
    flex: 1;
    padding: var(--spacing-4) var(--spacing-5);
    border: 2px solid rgba(115, 119, 122, 0.2);
    border-radius: var(--radius-default);
    font-size: var(--body-md-size);
    font-family: var(--font-family);
    background: var(--surface-container-lowest);
    color: var(--on-surface);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.email-input::placeholder {
    color: var(--on-surface-variant);
    opacity: 0.6;
}

.email-input:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 4px rgba(154, 37, 174, 0.15);
}

.form-hint {
    color: var(--on-surface-variant);
    opacity: 0.7;
}

.success-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-4);
    background: linear-gradient(135deg, var(--tertiary) 0%, #8b5cf6 100%);
    color: #ffffff;
    border-radius: var(--radius-default);
    font-size: var(--body-md-size);
    font-weight: 600;
    margin-top: var(--spacing-4);
    box-shadow: 0 8px 24px rgba(101, 47, 232, 0.3);
}

.success-message.hidden {
    display: none;
}

.success-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: rgba(255, 255, 255, 0.3);
    color: #ffffff;
    border-radius: 50%;
    font-size: 14px;
    font-weight: 700;
}

/* ===== HERO VISUAL ===== */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.phone-mockup {
    position: relative;
    width: 100%;
    max-width: 400px;
}

.profile-card {
    background: #ffffff;
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    box-shadow: 0 20px 60px rgba(154, 37, 174, 0.25);
    position: relative;
    border: 2px solid rgba(237, 118, 253, 0.2);
}

.profile-card.floating {
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.verified-badge {
    position: absolute;
    top: -12px;
    right: var(--spacing-6);
    background: linear-gradient(135deg, var(--tertiary) 0%, #8b5cf6 100%);
    color: #ffffff;
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-full);
    font-size: var(--label-sm-size);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    box-shadow: 0 8px 24px rgba(101, 47, 232, 0.4);
}

.profile-image-container {
    margin-bottom: var(--spacing-5);
    display: flex;
    justify-content: center;
}

.profile-image {
    width: 200px;
    height: 200px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 50%, var(--tertiary) 100%);
    opacity: 0.5;
    box-shadow: 0 10px 40px rgba(183, 0, 79, 0.3);
}

.profile-info {
    margin-bottom: var(--spacing-4);
}

.profile-info h3 {
    margin-bottom: var(--spacing-2);
}

.profile-bio {
    color: var(--on-surface-variant);
}

.shared-interests {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-5);
}

.interest-chip {
    background: var(--secondary-container);
    color: var(--on-secondary-container);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-full);
    font-size: var(--label-sm-size);
    font-weight: 600;
}

.date-idea-card {
    background: linear-gradient(135deg, rgba(183, 0, 79, 0.1) 0%, rgba(154, 37, 174, 0.1) 100%);
    padding: var(--spacing-4);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-5);
    border: 2px solid rgba(183, 0, 79, 0.2);
}

.date-idea-header {
    margin-bottom: var(--spacing-2);
}

.date-idea-header .label-md {
    color: var(--primary);
    font-size: 0.625rem;
}

.date-idea-card h4 {
    margin-bottom: var(--spacing-2);
}

.date-idea-card .body-sm {
    color: var(--on-surface-variant);
}

/* ===== HOW IT WORKS SECTION ===== */
.how-it-works {
    padding: var(--spacing-20) 0;
    background: #ffffff;
    position: relative;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-12);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-8);
}

.step-card {
    background: #ffffff;
    padding: var(--spacing-8);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
    border: 2px solid rgba(237, 118, 253, 0.15);
    box-shadow: 0 4px 20px rgba(154, 37, 174, 0.08);
    opacity: 1;
}

.step-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(154, 37, 174, 0.2);
    border-color: rgba(237, 118, 253, 0.4);
    opacity: 0.95;
}

.step-number {
    font-size: var(--display-sm-size);
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-4);
}

.step-card h3 {
    margin-bottom: var(--spacing-3);
}

/* ===== FEATURES SECTION ===== */
.features {
    padding: var(--spacing-20) 0;
    background: #fef9fc;
    position: relative;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-8);
}

.feature-card {
    text-align: center;
    padding: var(--spacing-6);
    background: #ffffff;
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
    border: 1px solid rgba(195, 199, 202, 0.2);
    opacity: 1;
    box-shadow: 0 0 0 rgba(154, 37, 174, 0);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(154, 37, 174, 0.15);
    opacity: 0.95;
}

.feature-icon {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-5);
}

.feature-icon.personality {
    background: var(--tertiary-container);
    color: var(--tertiary);
}

.feature-icon.location {
    background: var(--secondary-container);
    color: var(--secondary);
}

.feature-icon.calendar {
    background: rgba(183, 0, 79, 0.1);
    color: var(--primary);
}

.feature-icon.safety {
    background: var(--tertiary-container);
    color: var(--tertiary);
}

.feature-card h3 {
    margin-bottom: var(--spacing-3);
}

/* ===== STATS SECTION ===== */
.stats {
    padding: var(--spacing-16) 0;
    background: #fef9fc;
    position: relative;
    overflow: hidden;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-8);
    position: relative;
    z-index: 1;
}

.stat {
    text-align: center;
}

.stat-number {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-2);
}

.stat .label-md {
    color: var(--on-surface-variant);
}

/* ===== FINAL CTA SECTION ===== */
.final-cta {
    padding: var(--spacing-20) 0;
    background: #ffffff;
    position: relative;
}

.cta-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(233, 221, 255, 0.3) 100%);
    padding: var(--spacing-12);
    border-radius: var(--radius-lg);
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
    box-shadow: 0 20px 60px rgba(154, 37, 174, 0.2);
    border: 2px solid rgba(237, 118, 253, 0.2);
    position: relative;
    z-index: 1;
}

.cta-card h2 {
    margin-bottom: var(--spacing-4);
}

.cta-card .body-lg {
    margin-bottom: var(--spacing-8);
}

.cta-card .waitlist-form {
    max-width: 500px;
    margin: 0 auto var(--spacing-3);
}

/* ===== FOOTER ===== */
.footer {
    padding: var(--spacing-12) 0 var(--spacing-6);
    background: var(--surface-container-low);
    color: var(--on-surface);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-8);
    padding-bottom: var(--spacing-8);
}

.footer-brand .footer-logo {
    height: 32px;
    width: auto;
    margin-bottom: var(--spacing-2);
}

.footer-brand .body-sm {
    color: var(--on-surface-variant);
}

.footer-links {
    display: flex;
    gap: var(--spacing-6);
}

.footer-links a {
    color: var(--on-surface-variant);
    text-decoration: none;
    transition: color 0.2s ease, opacity 0.2s ease;
    opacity: 1;
}

.footer-links a:hover {
    color: var(--primary);
    opacity: 0.8;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-6);
    border-top: 1px solid var(--surface-container-highest);
    color: var(--on-surface-variant);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: var(--spacing-8);
    }
    
    .hero-visual {
        order: -1;
    }
    
    .phone-mockup {
        max-width: 320px;
    }
    
    .hero-content {
        text-align: center;
        max-width: 100%;
    }
    
    .waitlist-form {
        flex-direction: column;
    }
    
    .hero .body-lg {
        margin-left: auto;
        margin-right: auto;
    }
}

@media (max-width: 768px) {
    :root {
        --display-lg-size: 2.5rem;
        --display-md-size: 2rem;
        --headline-lg-size: 1.75rem;
    }
    
    .hero {
        padding: var(--spacing-12) 0;
        min-height: auto;
    }
    
    .how-it-works,
    .features,
    .final-cta {
        padding: var(--spacing-12) 0;
    }
    
    .stats {
        padding: var(--spacing-10) 0;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-6);
        text-align: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-3);
    }
}

@media (max-width: 480px) {
    .profile-card {
        padding: var(--spacing-4);
    }
    
    .profile-image {
        width: 160px;
        height: 160px;
    }
    
    .step-card,
    .cta-card {
        padding: var(--spacing-6);
    }
}