/* ============================================
   LEAD Brain Fit — Premium Dark Luxury Styles
   Charcoal + Coral Palette
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    --bg-primary: #0D0D0D;
    --bg-secondary: #141414;
    --bg-tertiary: #1A1A1A;
    --bg-card: #181818;
    --bg-card-hover: #1E1E1E;
    --bg-elevated: #222222;

    --coral-50: #FFF0EC;
    --coral-100: #FADDD5;
    --coral-200: #F5C4B8;
    --coral-300: #E8734A;
    --coral-400: #E8734A;
    --coral-500: #D4572E;
    --coral-600: #C44A25;
    --coral-700: #A83D1F;
    --coral-800: #8C3119;
    --coral-900: #702613;

    --text-primary: #F5F5F5;
    --text-secondary: #B0B0B0;
    --text-tertiary: #808080;
    --text-muted: #606060;

    --gold-300: #D4A574;
    --gold-400: #C49A6C;
    --gold-500: #B8860B;

    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-medium: rgba(255, 255, 255, 0.1);
    --border-corral: rgba(232, 115, 74, 0.3);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(232, 115, 74, 0.15);

    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Typography --- */
h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
}

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition-base);
    background: transparent;
}

.navbar.scrolled {
    padding: 12px 0;
    background: rgba(13, 13, 13, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.logo-accent {
    color: var(--coral-300);
}

.nav-logo-icon {
    flex-shrink: 0;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--coral-300);
    transition: var(--transition-base);
}

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

.nav-links a:hover::after {
    width: 100%;
}

.nav-cta {
    padding: 10px 24px !important;
    background: var(--coral-300) !important;
    color: var(--text-primary) !important;
    border-radius: 100px;
    font-weight: 600 !important;
    transition: var(--transition-base) !important;
    box-shadow: 0 4px 20px rgba(232, 115, 74, 0.25);
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    background: var(--coral-500) !important;
    transform: translateY(-1px);
    box-shadow: 0 6px 28px rgba(232, 115, 74, 0.35);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    color: var(--text-primary);
}

.nav-toggle svg {
    display: block;
}

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 120px 0 80px;
    background: var(--bg-primary);
    overflow: hidden;
}

.hero-bg-pattern {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 70% 40%, rgba(232, 115, 74, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse 50% 80% at 10% 90%, rgba(232, 115, 74, 0.05) 0%, transparent 50%),
        radial-gradient(ellipse 40% 50% at 90% 10%, rgba(196, 154, 108, 0.04) 0%, transparent 50%);
    pointer-events: none;
}

.hero-bg-pattern::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(232, 115, 74, 0.1);
    border: 1px solid rgba(232, 115, 74, 0.25);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--coral-300);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 28px;
}

.hero-headline {
    font-size: clamp(2.2rem, 4.5vw, 3.8rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

.hero-headline .headline-accent {
    color: var(--coral-300);
    font-style: italic;
}

.hero-subheadline {
    font-size: 1.1rem;
    line-height: 1.75;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 480px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 100px;
    font-size: 0.95rem;
    font-weight: 600;
    transition: var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: var(--coral-300);
    color: #fff;
    box-shadow: 0 4px 24px rgba(232, 115, 74, 0.3);
}

.btn-primary:hover {
    background: var(--coral-500);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(232, 115, 74, 0.4);
}

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

.btn-secondary:hover {
    border-color: var(--coral-300);
    color: var(--coral-300);
    transform: translateY(-2px);
}

.btn-outline-light {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-outline-light:hover {
    border-color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 18px 40px;
    font-size: 1.05rem;
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* --- Hero Visual --- */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-card-main {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-subtle);
    width: 100%;
    max-width: 480px;
    aspect-ratio: 480/560;
}

.hero-card-main img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-card-main-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 32px;
    background: linear-gradient(to top, rgba(13, 13, 13, 0.95) 0%, rgba(13, 13, 13, 0.7) 60%, transparent 100%);
}

.card-main-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--coral-300);
    margin-bottom: 8px;
}

.hero-card-main-content p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* --- Stat Cards --- */
.stat-card {
    position: absolute;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    box-shadow: var(--shadow-md);
    z-index: 2;
}

.stat-card--top {
    top: -20px;
    right: -30px;
    animation: float 6s ease-in-out infinite;
}

.stat-card--bottom {
    bottom: 40px;
    left: -40px;
    animation: float 6s ease-in-out infinite 3s;
}

.stat-card-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
}

.stat-card-number {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--coral-300);
    line-height: 1;
    margin-bottom: 4px;
}

.stat-card-label {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    line-height: 1.3;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* --- Scroll Indicator --- */
.hero-scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-muted);
    animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.5; }
    50% { transform: translateX(-50%) translateY(6px); opacity: 1; }
}

/* --- Section Shared --- */
.section-header {
    max-width: 700px;
    margin-bottom: 64px;
}

.section-header--center {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--coral-300);
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.75rem);
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.75;
}

/* --- Services --- */
.services {
    padding: 120px 0;
    background: var(--bg-secondary);
    position: relative;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-subtle), transparent);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: var(--transition-base);
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--coral-300), var(--coral-500));
    opacity: 0;
    transition: var(--transition-base);
}

.service-card:hover {
    border-color: var(--border-corral);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
    background: var(--bg-card-hover);
}

.service-card:hover::before {
    opacity: 1;
}

.service-card-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: rgba(232, 115, 74, 0.1);
    margin-bottom: 24px;
    border: 1px solid rgba(232, 115, 74, 0.2);
}

.service-card-title {
    font-size: 1.25rem;
    margin-bottom: 12px;
    font-family: var(--font-body);
    font-weight: 600;
}

.service-card-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-card-features {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.service-card-features li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.service-card-features li::before {
    content: '';
    flex-shrink: 0;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--coral-300);
    margin-top: 8px;
}

/* --- About --- */
.about {
    padding: 120px 0;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(ellipse at center right, rgba(232, 115, 74, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-visual {
    position: relative;
}

.about-image-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-subtle);
}

.about-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-image-accent {
    position: absolute;
    top: -20px;
    left: -20px;
    width: 120px;
    height: 120px;
    border: 2px solid rgba(232, 115, 74, 0.3);
    border-radius: var(--radius-lg);
    z-index: -1;
}

.about-floating-stat {
    position: absolute;
    bottom: -24px;
    right: -24px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 24px 32px;
    box-shadow: var(--shadow-md);
}

.about-floating-stat-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--coral-300);
    line-height: 1;
    margin-bottom: 4px;
}

.about-floating-stat-label {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    line-height: 1.3;
}

.about-content {
    position: relative;
    z-index: 1;
}

.about-text {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-values {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 36px;
}

.about-value {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

.about-value-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

/* --- Approach --- */
.approach {
    padding: 120px 0;
    background: var(--bg-secondary);
    position: relative;
}

.approach::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-subtle), transparent