/* UpliftFocus Calm Design System */

:root {
    /* Foundation Colors (Light Mode) */
    --bg-color: #F7F9FC;
    --panel-bg: #FFFFFF;
    --card-bg: #FFFFFF;
    --text-primary: #2D3748;
    --text-secondary: #718096;
    --border-color: #E2E8F0;
    --input-bg: #F8FAFC;

    /* Brand & Status Colors */
    --primary-color: #81E6D9;
    --primary-hover: #4FD1C5;
    --primary-text: #234E52;
    --secondary-color: #E2E8F0;
    --secondary-hover: #CBD5E0;
    --secondary-text: #4A5568;
    --accent-color: #FBD38D;
    --accent-hover: #F6AD55;
    --success-color: #9AE6B4;
    --warning-color: #FEB2B2;

    /* Spacing & Border Radii */
    --space-2: 0.5rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;
    --space-touch: 3rem;
    --border-radius-sm: 0.5rem;
    --border-radius-md: 1rem;
    --border-radius-lg: 1.5rem;
    --border-radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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);

    /* Transitions */
    --transition-standard: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme='dark'] {
    --bg-color: #1A202C;
    --panel-bg: #2D3748;
    --card-bg: #212836;
    --text-primary: #E2E8F0;
    --text-secondary: #A0AEC0;
    --primary-color: #319795;
    --border-color: #4A5568;
    --input-bg: #1A202C;
    --primary-text: #E6FFFA;
}

/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 {
    font-size: 2.5rem;
    font-weight: 900;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-6);
}

h2 {
    font-size: 2rem;
    margin-bottom: var(--space-4);
}

h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-2);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-standard);
}

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

/* Layout Containers */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

section {
    padding: var(--space-12) 0;
}

/* Components */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 2rem;
    font-weight: 700;
    border-radius: var(--border-radius-full);
    border: none;
    cursor: pointer;
    transition: var(--transition-standard);
    font-size: 1rem;
    gap: 0.5rem;
}

.hero-actions,
.btn-group {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

.btn:active {
    transform: scale(0.95);
}

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

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

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

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

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--space-8);
    box-shadow: var(--shadow-md);
    transition: var(--transition-standard);
}

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

/* Header & Navigation */
header {
    min-height: 100px;
    display: flex;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-2) 0;
}

[data-theme='dark'] header {
    background-color: rgba(26, 32, 44, 0.8);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.logo img {
    height: 87.5px;
    width: auto;
}

.footer-logo img {
    height: 50px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: var(--space-6);
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 600;
}

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

/* Hero Section */
.hero {
    text-align: center;
    padding: var(--space-12) 0;
    background: radial-gradient(circle at center, rgba(129, 230, 217, 0.05) 0%, transparent 70%);
}

.hero h1 {
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-8);
}

/* Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-8);
    margin-top: var(--space-8);
}

.feature-card {
    text-align: center;
}

.feature-icon {
    width: 64px;
    height: 64px;
    background-color: var(--primary-color);
    color: var(--primary-text);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-4);
    font-size: 1.5rem;
}

/* Mockup Section */
.mockup-container {
    margin-top: var(--space-12);
    position: relative;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.carousel {
    position: relative;
    width: 100%;
    aspect-ratio: 1920/940;
}

/* Simplified Carousel */
.carousel-track {
    position: relative;
    width: 100%;
    height: 100%;
    background: var(--card-bg);
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
    pointer-events: none;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-slide.active {
    opacity: 1;
    pointer-events: auto;
    z-index: 2;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.carousel-nav {
    position: absolute;
    bottom: var(--space-4);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--space-2);
    z-index: 10;
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--text-secondary);
    opacity: 0.5;
    cursor: pointer;
    transition: var(--transition-standard);
}

.carousel-dot.active {
    background: var(--primary-color);
    opacity: 1;
    transform: scale(1.2);
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: none;
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: var(--transition-standard);
}

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

.carousel-btn.prev { left: var(--space-4); }
.carousel-btn.next { right: var(--space-4); }

/* Footer */
footer {
    background-color: var(--panel-bg);
    padding: var(--space-12) 0;
    border-top: 1px solid var(--border-color);
    margin-top: var(--space-12);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-8);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-2);
}

.footer-links a {
    color: var(--text-secondary);
}

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.menu-toggle {
    display: none;
}

/* Mobile Specifics */
@media (max-width: 768px) {
    header {
        min-height: 80px;
    }
    .logo img {
        height: 60px;
    }
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    
    .nav-links { 
        display: none; 
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--panel-bg);
        flex-direction: column;
        padding: var(--space-6);
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
        z-index: 100;
    }

    .nav-links.active {
        display: flex;
    }

    .menu-toggle {
        display: block !important;
        background: none;
        border: none;
        font-size: 1.5rem;
        color: var(--text-primary);
        cursor: pointer;
    }

    .hero-actions,
    .btn-group {
        display: flex !important;
        flex-direction: column !important;
        gap: 1.5rem !important;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
        margin: 0 !important;
    }
}

.design-principles {
    font-size: 0.75rem;
    color: var(--text-primary);
    font-weight: 500;
    margin-top: -0.25rem;
    margin-bottom: var(--space-8);
    display: block;
    opacity: 0.9;
}

/* Utility Classes */
.text-center { text-align: center; }
.mt-4 { margin-top: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }