/* ===========================================
   Propfolio Landing Page — Design System Compliant
   Tokens sourced from Figma Variables
   =========================================== */

:root {
    /* --- Colors (Light Mode Semantic Tokens) --- */
    --color-bg: #ffffff;                    /* Bg/Surface */
    --color-bg-alt: #f5f6f8;               /* Bg/Surface Sunken */
    --color-bg-raised: #ffffff;             /* Bg/Surface Raised */
    --color-bg-input: #ffffff;              /* Bg/Input */
    --color-text: #1f2022;                  /* Text/Bold */
    --color-text-subtle: #414346;           /* Text/Subtle */
    --color-text-disabled: #66696d;         /* Text/Disabled */
    --color-text-inverse: #ffffff;          /* Text/Inverse */
    --color-primary: #184c3c;               /* Bg/Brand, Text/Brand */
    --color-primary-hover: #143f32;         /* Bg/Brand Hover */
    --color-accent: #00e751;                /* Bg/Brand Accent, Text/Brand Accent */
    --color-accent-glow: rgba(0, 231, 81, 0.15);
    --color-success: #007a4d;               /* Text/Success */
    --color-error: #d31510;                 /* Text/Danger, Bg/Danger */
    --color-warning: #b14c00;               /* Text/Warning */
    --color-info: #0265dc;                  /* Text/Info */
    --color-link: #0265dc;                  /* Text/Link */
    --color-border: #d5d5d5;               /* Border/Subtle */
    --color-border-bold: #1f2022;           /* Border/Bold */
    --color-border-brand: #184c3c;          /* Border/Brand */
    --color-border-focus: #59a7f6;          /* Border/Focus */
    --color-gold: #FFD700;                  /* Decorative — leaderboard */
    --color-silver: #C0C0C0;               /* Decorative — leaderboard */
    --color-bronze: #CD7F32;               /* Decorative — leaderboard */

    /* --- Typography --- */
    --font-primary: 'Satoshi', -apple-system, sans-serif;
    --font-mono: 'Roboto Mono', monospace;

    /* --- Corner Radius (from Numbers tokens) --- */
    --radius-s: 4px;                        /* Corner/S */
    --radius-m: 8px;                        /* Corner/M */
    --radius-ring: 12px;                    /* Corner/Ring */
    --radius-l: 16px;                       /* Corner/L */
    --radius-round: 100px;                  /* Corner/Round */

    /* --- Spacing (from Numbers tokens) --- */
    --space-xxxs: 2px;
    --space-xxs: 4px;
    --space-xs: 8px;
    --space-s: 12px;
    --space-m: 16px;
    --space-l: 24px;
    --space-xl: 32px;
    --space-xxl: 40px;

    /* --- Shadows --- */
    --shadow-sm: 0 2px 8px rgba(24, 76, 60, 0.06);
    --shadow-md: 0 8px 30px rgba(24, 76, 60, 0.1);
    --shadow-lg: 0 20px 60px rgba(24, 76, 60, 0.12);
    --shadow-accent: 0 8px 30px rgba(0, 231, 81, 0.25);

    /* --- Transition --- */
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 16px;                        /* Body/Size M Desktop */
    font-weight: 400;                       /* Body/Weight Regular */
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Subtle grid pattern background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(24, 76, 60, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(24, 76, 60, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: -1;
}

/* ==================
   Navigation
   ================== */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-m) var(--space-xl);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: rgba(255, 255, 255, 0.85);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
}

nav.scrolled {
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    text-decoration: none;
    display: flex;
    align-items: center;
}

.logo-img {
    height: 32px;
    width: auto;
}

.nav-cta {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    padding: var(--space-s) var(--space-l);
    border-radius: var(--radius-round);
    text-decoration: none;
    font-family: var(--font-primary);
    font-weight: 600;                       /* Weight/Bold */
    font-size: 14px;                        /* Label/Size S */
    transition: var(--transition);
    border: 2px solid var(--color-primary);
}

.nav-cta:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ==================
   Hero Section
   ================== */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xxl);
    max-width: 1200px;
    margin: 0 auto;
    padding: 128px var(--space-xl) 64px;
    align-items: center;
}

.hero-content {
    animation: fadeInUp 0.8s ease-out;
}

.urgency-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    background: var(--color-primary);
    color: var(--color-text-inverse);
    padding: var(--space-xs) var(--space-m) var(--space-xs) var(--space-s);
    border-radius: var(--radius-round);
    font-size: 14px;                        /* Label/Size S */
    font-weight: 600;                       /* Weight/Bold */
    margin-bottom: var(--space-l);
    animation: pulse 2s infinite;
    font-family: var(--font-primary);
}

.urgency-badge svg {
    color: var(--color-accent);
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(0, 231, 81, 0.4); }
    50% { box-shadow: 0 0 0 10px rgba(0, 231, 81, 0); }
}

.hero h1 {
    font-family: var(--font-primary);
    font-size: 36px;                        /* Heading/Size XL Desktop */
    line-height: 1.1;
    color: var(--color-primary);
    margin-bottom: var(--space-l);
    font-weight: 500;                       /* Heading/Weight Medium Desktop */
    letter-spacing: -0.03em;
}

.hero h1 .highlight {
    color: var(--color-accent);
    position: relative;
}

.hero-description {
    font-size: 18px;                        /* Body/Size L Desktop */
    color: var(--color-text-subtle);
    max-width: 520px;
    margin-bottom: var(--space-xl);
    line-height: 1.7;
    font-weight: 400;                       /* Body/Weight Regular */
}

/* ==================
   Form Card
   ================== */
.form-card {
    background: var(--color-bg);
    border-radius: var(--radius-l);
    padding: var(--space-xxl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.form-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: var(--space-xxs);
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}

.form-title {
    font-family: var(--font-primary);
    font-size: 20px;                        /* Heading/Size M Desktop */
    font-weight: 500;                       /* Heading/Weight Medium Desktop */
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
}

.form-subtitle {
    color: var(--color-text-subtle);
    font-size: 14px;                        /* Body/Size S */
    margin-bottom: var(--space-l);
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-m);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xxs);
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 14px;                        /* Label/Size S */
    font-weight: 500;                       /* Label/Weight Medium */
    color: var(--color-text);
    font-family: var(--font-primary);
}

.form-group input,
.form-group select {
    padding: var(--space-s) var(--space-m);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-m);
    font-family: var(--font-primary);       /* Input/Family Satoshi */
    font-size: 16px;                        /* Input/Size M */
    font-weight: 400;                       /* Input/Weight Regular */
    transition: var(--transition);
    background: var(--color-bg-input);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(89, 167, 246, 0.25);
}

.form-group input::placeholder {
    color: var(--color-text-disabled);
}

.form-group input.error,
.form-group select.error {
    border-color: var(--color-error);
    box-shadow: 0 0 0 3px rgba(211, 21, 16, 0.1);
}

.submit-btn {
    width: 100%;
    padding: var(--space-m);
    background: var(--color-accent);
    color: var(--color-primary);
    border: none;
    border-radius: var(--radius-m);
    font-family: var(--font-primary);
    font-size: 16px;                        /* Label/Size M */
    font-weight: 600;                       /* Weight/Bold */
    cursor: pointer;
    transition: var(--transition);
    margin-top: var(--space-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
}

.submit-btn:hover:not(:disabled) {
    background: #00c945;
    transform: translateY(-2px);
    box-shadow: var(--shadow-accent);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.submit-btn svg {
    transition: var(--transition);
}

.submit-btn:hover:not(:disabled) svg {
    transform: translateX(4px);
}

.submit-btn .spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 2.5px solid var(--color-primary);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.submit-btn.loading .spinner {
    display: inline-block;
}

.submit-btn.loading .btn-text,
.submit-btn.loading svg {
    display: none;
}

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

.form-footer {
    text-align: center;
    margin-top: var(--space-m);
    font-size: 12px;                        /* Body/Size XS */
    color: var(--color-text-disabled);
}

.form-error-message {
    display: none;
    color: var(--color-error);
    font-size: 14px;                        /* Body/Size S */
    text-align: center;
    margin-top: var(--space-s);
    padding: var(--space-xs);
    background: rgba(211, 21, 16, 0.08);
    border-radius: var(--radius-m);
}

.form-error-message.visible {
    display: block;
    animation: fadeInUp 0.3s ease-out;
}

/* ==================
   Success State
   ================== */
.form-success {
    display: none;
    text-align: center;
    padding: var(--space-xl) 0;
}

.form-success.active {
    display: block;
    animation: fadeInUp 0.5s ease-out;
}

.success-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-accent), #00c945);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-l);
    box-shadow: var(--shadow-accent);
}

.success-icon svg {
    width: 40px;
    height: 40px;
    color: var(--color-primary);
}

.success-title {
    font-family: var(--font-primary);
    font-size: 25px;                        /* Heading/Size L */
    font-weight: 500;                       /* Heading/Weight Medium Desktop */
    color: var(--color-primary);
    margin-bottom: var(--space-s);
}

.success-text {
    color: var(--color-text-subtle);
    font-size: 16px;                        /* Body/Size M */
    margin-bottom: var(--space-l);
}

.referral-box {
    background: var(--color-bg-alt);
    border-radius: var(--radius-m);
    padding: var(--space-m);
    display: flex;
    gap: var(--space-xs);
    margin-bottom: var(--space-m);
}

.referral-box input {
    flex: 1;
    padding: var(--space-s);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-m);
    font-family: var(--font-primary);
    font-size: 14px;                        /* Input/Size S */
    font-weight: 400;
    background: var(--color-bg);
}

.copy-btn {
    padding: var(--space-s) var(--space-m);
    background: var(--color-primary);
    color: var(--color-text-inverse);
    border: none;
    border-radius: var(--radius-m);
    font-family: var(--font-primary);
    font-weight: 600;                       /* Weight/Bold */
    font-size: 14px;                        /* Label/Size S */
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.copy-btn:hover {
    background: var(--color-primary-hover);
}

.share-buttons {
    display: flex;
    justify-content: center;
    gap: var(--space-s);
}

.share-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-bg-alt);
    border: 1.5px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    color: var(--color-text-subtle);
}

.share-btn:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-text-inverse);
    transform: translateY(-3px);
}

/* ==================
   Social Proof
   ================== */
.social-proof {
    background: var(--color-bg-alt);
    padding: var(--space-xxl) var(--space-xl);
    text-align: center;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.social-proof-label {
    font-family: var(--font-primary);
    font-size: 14px;                        /* Label/Size S */
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-subtle);
    margin-bottom: var(--space-l);
    font-weight: 500;                       /* Label/Weight Medium */
}

.logos-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-xxl);
    flex-wrap: wrap;
    max-width: 900px;
    margin: 0 auto;
}

.logo-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    opacity: 0.7;
    transition: var(--transition);
}

.logo-item:hover {
    opacity: 1;
}

.logo-placeholder {
    font-family: var(--font-primary);
    font-size: 20px;                        /* Heading/Size M */
    font-weight: 600;                       /* Weight/Bold */
    color: var(--color-primary);
}

.logo-type {
    font-size: 12px;                        /* Body/Size XS */
    color: var(--color-text-subtle);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;                       /* Label/Weight Medium */
}

/* ==================
   Features Section
   ================== */
.features {
    max-width: 1200px;
    margin: 0 auto;
    padding: 96px var(--space-xl);          /* Section-level spacing */
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 64px;                    /* Section-level spacing */
}

.section-header h2 {
    font-family: var(--font-primary);
    font-size: 25px;                        /* Heading/Size L Desktop */
    color: var(--color-primary);
    margin-bottom: var(--space-m);
    font-weight: 500;                       /* Heading/Weight Medium Desktop */
    letter-spacing: -0.02em;
}

.section-header p {
    color: var(--color-text-subtle);
    font-size: 18px;                        /* Body/Size L */
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.feature-card {
    background: var(--color-bg);
    padding: var(--space-xl);
    border-radius: var(--radius-ring);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    transform: scaleX(0);
    transition: var(--transition);
}

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

.feature-card:hover::after {
    transform: scaleX(1);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--color-accent-glow), rgba(24, 76, 60, 0.05));
    border-radius: var(--radius-m);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-l);
    border: 1px solid var(--color-border);
    color: var(--color-primary);
}

.feature-card h3 {
    font-family: var(--font-primary);
    font-size: 16px;                        /* Heading/Size S Desktop */
    font-weight: 500;                       /* Heading/Weight Medium Desktop */
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.feature-card p {
    font-size: 14px;                        /* Body/Size S */
    color: var(--color-text-subtle);
    line-height: 1.6;
}

/* ==================
   Referral Section
   ================== */
.referral-section {
    background: var(--color-primary);
    padding: 64px var(--space-xl);          /* Section-level spacing */
    position: relative;
    overflow: hidden;
}

.referral-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 231, 81, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.referral-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    position: relative;
}

.referral-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    background: rgba(0, 231, 81, 0.15);
    color: var(--color-accent);
    padding: var(--space-xxs) var(--space-m);
    border-radius: var(--radius-round);
    font-size: 14px;                        /* Label/Size S */
    font-weight: 600;                       /* Weight/Bold */
    margin-bottom: var(--space-l);
    border: 1px solid rgba(0, 231, 81, 0.2);
    font-family: var(--font-primary);
}

.referral-section h2 {
    font-family: var(--font-primary);
    font-size: 25px;                        /* Heading/Size L Desktop */
    color: var(--color-text-inverse);
    margin-bottom: var(--space-m);
    font-weight: 500;                       /* Heading/Weight Medium Desktop */
    letter-spacing: -0.02em;
}

.referral-section h2 .highlight {
    color: var(--color-accent);
}

.referral-section p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 18px;                        /* Body/Size L */
    line-height: 1.7;
    margin-bottom: var(--space-s);
}

.referral-section .small {
    font-size: 14px;                        /* Body/Size S */
    color: rgba(255, 255, 255, 0.6);
}

/* ==================
   Leaderboard Section
   ================== */
.leaderboard-section {
    max-width: 900px;
    margin: 0 auto;
    padding: 96px var(--space-xl);          /* Section-level spacing */
}

.leaderboard-container {
    background: var(--color-bg);
    border-radius: var(--radius-l);
    border: 1px solid var(--color-border);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.leaderboard-header {
    background: linear-gradient(135deg, var(--color-primary), #1a5a46);
    padding: var(--space-l) var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.leaderboard-header h3 {
    font-family: var(--font-primary);
    font-size: 20px;                        /* Heading/Size M */
    font-weight: 500;                       /* Heading/Weight Medium Desktop */
    color: var(--color-text-inverse);
    display: flex;
    align-items: center;
    gap: var(--space-s);
}

.leaderboard-header .trophy-icon {
    color: var(--color-gold);
}

.leaderboard-live {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 12px;                        /* Body/Size XS */
    color: rgba(255, 255, 255, 0.7);
    font-family: var(--font-primary);
    font-weight: 500;
}

.live-dot {
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 50%;
    animation: livePulse 1.5s infinite;
}

@keyframes livePulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.leaderboard-list {
    list-style: none;
}

.leaderboard-item {
    display: grid;
    grid-template-columns: 60px 1fr auto;
    align-items: center;
    padding: var(--space-m) var(--space-xl);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
}

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

.leaderboard-item:hover {
    background: var(--color-bg-alt);
}

.leaderboard-item.top-five {
    background: linear-gradient(90deg, rgba(0, 231, 81, 0.05), transparent);
}

.leaderboard-item.top-five:hover {
    background: linear-gradient(90deg, rgba(0, 231, 81, 0.1), var(--color-bg-alt));
}

.leaderboard-rank {
    font-family: var(--font-primary);
    font-weight: 700;                       /* Weight/Black — emphasis */
    font-size: 16px;                        /* Label/Size M */
    color: var(--color-text-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-bg-alt);
}

.leaderboard-item:nth-child(1) .leaderboard-rank {
    background: linear-gradient(135deg, #FFD700, #FFA500);
    color: var(--color-text-inverse);
}

.leaderboard-item:nth-child(2) .leaderboard-rank {
    background: linear-gradient(135deg, #C0C0C0, #A8A8A8);
    color: var(--color-text-inverse);
}

.leaderboard-item:nth-child(3) .leaderboard-rank {
    background: linear-gradient(135deg, #CD7F32, #B8860B);
    color: var(--color-text-inverse);
}

.leaderboard-user {
    display: flex;
    align-items: center;
    gap: var(--space-m);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), #1a5a46);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-inverse);
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 14px;                        /* Label/Size S */
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-family: var(--font-primary);
    font-weight: 600;                       /* Weight/Bold */
    color: var(--color-text);
    font-size: 14px;                        /* Body/Size S */
}

.user-joined {
    font-size: 12px;                        /* Body/Size XS */
    color: var(--color-text-subtle);
}

.leaderboard-stats {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.referral-count {
    font-family: var(--font-primary);
    font-weight: 700;                       /* Weight/Black — emphasis */
    font-size: 20px;                        /* Heading/Size M */
    color: var(--color-primary);
}

.referral-label {
    font-size: 12px;                        /* Body/Size XS */
    color: var(--color-text-subtle);
}

.top-badge {
    background: var(--color-accent);
    color: var(--color-primary);
    font-family: var(--font-primary);
    font-weight: 700;                       /* Weight/Black */
    font-size: 12px;                        /* Body/Size XS — minimum token size */
    padding: var(--space-xxxs) var(--space-xs);
    border-radius: var(--radius-round);
    margin-left: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.leaderboard-footer {
    padding: var(--space-m) var(--space-xl);
    background: var(--color-bg-alt);
    text-align: center;
    border-top: 1px solid var(--color-border);
}

.leaderboard-footer p {
    font-size: 14px;                        /* Body/Size S */
    color: var(--color-text-subtle);
}

.leaderboard-footer strong {
    color: var(--color-primary);
}

/* ==================
   FAQ Section
   ================== */
.faq-section {
    max-width: 800px;
    margin: 0 auto;
    padding: 96px var(--space-xl);          /* Section-level spacing */
}

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

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: var(--space-l) 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    text-align: left;
    font-family: var(--font-primary);
    font-size: 16px;                        /* Heading/Size S Desktop */
    font-weight: 500;                       /* Heading/Weight Medium Desktop */
    color: var(--color-text);
    transition: var(--transition);
}

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

.faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--color-bg-alt);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
    color: var(--color-text-subtle);
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.faq-answer-inner {
    padding-bottom: var(--space-l);
    color: var(--color-text-subtle);
    font-size: 16px;                        /* Body/Size M */
    line-height: 1.7;
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

/* ==================
   Secondary CTA
   ================== */
.secondary-cta {
    text-align: center;
    padding: 64px var(--space-xl);          /* Section-level spacing */
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

.secondary-cta h2 {
    font-family: var(--font-primary);
    font-size: 25px;                        /* Heading/Size L Desktop */
    font-weight: 500;                       /* Heading/Weight Medium Desktop */
    color: var(--color-primary);
    margin-bottom: var(--space-l);
}

.secondary-cta .cta-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    background: var(--color-accent);
    color: var(--color-primary);
    padding: var(--space-m) var(--space-xl);
    border-radius: var(--radius-round);
    text-decoration: none;
    font-family: var(--font-primary);
    font-weight: 600;                       /* Weight/Bold */
    font-size: 16px;                        /* Label/Size M */
    transition: var(--transition);
}

.secondary-cta .cta-btn:hover {
    background: #00c945;
    transform: translateY(-2px);
    box-shadow: var(--shadow-accent);
}

/* ==================
   Footer
   ================== */
footer {
    padding: var(--space-xxl) var(--space-xl);
    text-align: center;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-logo {
    margin-bottom: var(--space-m);
    display: flex;
    justify-content: center;
}

.footer-logo .logo-img {
    height: 28px;
    width: auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    margin-bottom: var(--space-l);
}

.footer-links a {
    color: var(--color-text-subtle);
    text-decoration: none;
    font-size: 14px;                        /* Link/Size S */
    font-weight: 500;                       /* Link/Weight Medium */
    transition: var(--transition);
}

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

.footer-copyright {
    font-size: 12px;                        /* Body/Size XS */
    color: var(--color-text-disabled);
}

/* ==================
   Animations
   ================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==================
   Responsive — Mobile Typography + Layout
   ================== */
@media (max-width: 968px) {
    /* Mobile typography: headings get heavier (600) and larger */
    .hero h1 {
        font-size: 44px;                    /* Heading/Size XL Mobile */
        font-weight: 600;                   /* Heading/Weight Bold Mobile */
    }

    .section-header h2 {
        font-size: 31px;                    /* Heading/Size L Mobile */
        font-weight: 600;
    }

    .referral-section h2 {
        font-size: 31px;
        font-weight: 600;
    }

    .secondary-cta h2 {
        font-size: 31px;
        font-weight: 600;
    }

    .form-title {
        font-size: 24px;                    /* Heading/Size M Mobile */
        font-weight: 600;
    }

    .success-title {
        font-size: 31px;                    /* Heading/Size L Mobile */
        font-weight: 600;
    }

    .feature-card h3 {
        font-size: 19px;                    /* Heading/Size S Mobile */
        font-weight: 600;
    }

    .faq-question {
        font-size: 19px;                    /* Heading/Size S Mobile */
        font-weight: 600;
    }

    .leaderboard-header h3 {
        font-size: 24px;                    /* Heading/Size M Mobile */
        font-weight: 600;
    }

    /* Mobile body text scales up */
    .hero-description {
        font-size: 22px;                    /* Body/Size L Mobile */
    }

    .section-header p {
        font-size: 22px;                    /* Body/Size L Mobile */
    }

    .feature-card p {
        font-size: 17px;                    /* Body/Size S Mobile */
    }

    .faq-answer-inner {
        font-size: 19px;                    /* Body/Size M Mobile */
    }

    .referral-section p {
        font-size: 22px;                    /* Body/Size L Mobile */
    }

    .referral-section .small {
        font-size: 17px;                    /* Body/Size S Mobile */
    }

    /* Layout adjustments */
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-xl);
        padding-top: 112px;
    }

    /* Keep form labels left-aligned despite hero centering */
    .form-card {
        text-align: left;
    }

    .hero-description {
        margin: 0 auto var(--space-xl);
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .leaderboard-item {
        grid-template-columns: 50px 1fr auto;
        padding: var(--space-m) var(--space-l);
    }
}

@media (max-width: 640px) {
    nav {
        padding: var(--space-s) var(--space-m);
    }

    .logo .logo-img {
        height: 26px;
    }

    .nav-cta {
        padding: var(--space-xs) var(--space-m);
        font-size: 14px;
    }

    .hero {
        padding: 96px var(--space-m) var(--space-xxl);
    }

    .form-card {
        padding: var(--space-l);
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .form-group {
        grid-column: auto;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .logos-grid {
        gap: var(--space-xl);
    }

    .referral-box {
        flex-direction: column;
    }

    .leaderboard-section {
        padding: 64px var(--space-m);
    }

    .leaderboard-header {
        padding: var(--space-m) var(--space-m);
        flex-direction: column;
        gap: var(--space-s);
        text-align: center;
    }

    .leaderboard-item {
        grid-template-columns: 40px 1fr;
        gap: var(--space-s);
        padding: var(--space-m) var(--space-m);
    }

    .leaderboard-stats {
        grid-column: 1 / -1;
        justify-content: flex-start;
        padding-left: 52px;
        margin-top: var(--space-xxs);
    }

    .user-avatar {
        width: 36px;
        height: 36px;
        font-size: 12px;
    }

    .leaderboard-rank {
        width: 32px;
        height: 32px;
        font-size: 14px;
    }

    .features {
        padding: 64px var(--space-m);
    }

    .faq-section {
        padding: 64px var(--space-m);
    }
}