/* Global Styles */
:root {
    font-size: 16px;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--background-primary);
    color: var(--text-primary);
    line-height: 1.5;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

.app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navigation */
.main-nav {
    background-color: var(--surface-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    height: 64px;
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.main-nav.scrolled {
    background-color: rgba(var(--surface-primary-rgb), 0.8);
    box-shadow: var(--shadow-sm);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    font-weight: 700;
    transition: all var(--transition-normal);
}

.brand-link:hover {
    transform: translateY(-1px);
}

.brand-icon {
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-item {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    background: transparent;
}

.nav-item:hover {
    color: var(--text-primary);
    background: var(--glass-background);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    transform: translateY(-1px);
}

.nav-item.active {
    color: var(--primary-color);
    background: var(--glass-background);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
}

.nav-icon {
    font-size: 1.25rem;
    transition: transform var(--transition-normal);
}

.nav-item:hover .nav-icon {
    transform: scale(1.1);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: var(--font-size-md);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
}

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

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

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

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

/* Cards */
.card {
    background-color: var(--surface-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-2xl); }
h2 { font-size: var(--font-size-xl); }
h3 { font-size: var(--font-size-lg); }
h4 { font-size: var(--font-size-md); }

p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

/* Forms */
input, textarea, select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--surface-primary);
    color: var(--text-primary);
    font-size: var(--font-size-md);
    transition: all var(--transition-fast);
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.1);
}

label {
    display: block;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
}

/* Utilities */
.gradient-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

/* Mobile Navigation */
@media (max-width: 768px) {
    :root {
        font-size: 14px;
    }
    
    .nav-menu {
        display: none;
    }

    .main-nav {
        padding: 0.75rem 1rem;
    }

    .nav-brand {
        flex: 1;
        justify-content: center;
    }

    .nav-actions {
        margin-left: 0;
    }

    .hero-section {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-xl);
        margin-top: 64px;
        padding: var(--spacing-xl) var(--spacing-md);
        display: flex;
        flex-direction: column;
    }

    .hero-content {
        order: 1;
    }

    .hero-illustration {
        order: 2;
        margin-top: var(--spacing-xl);
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
        padding: 0 var(--spacing-md);
    }

    .floating-card {
        margin: 0;
    }
}

@media (min-width: 769px) {
    .menu-toggle {
        display: none;
    }
}

/* Hero Section */
.hero-section {
    padding: var(--spacing-xl) var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    max-width: 1200px;
    margin: 80px auto 0;
    min-height: calc(100vh - 64px);
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: titleGradient 8s ease infinite;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

/* Hero Buttons */
.hero-btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1.25rem 2.5rem;
    border-radius: var(--radius-full);
    font-size: var(--font-size-md);
    font-weight: 600;
    transition: all var(--transition-bounce);
    overflow: hidden;
    border: none;
    cursor: pointer;
    text-decoration: none;
    min-width: 200px;
}

.hero-btn .btn-icon {
    font-size: 1.5rem;
    transition: transform var(--transition-normal);
}

.hero-btn:hover .btn-icon {
    transform: scale(1.2) rotate(-10deg);
}

/* Primary Hero Button */
.hero-btn.primary {
    background: linear-gradient(135deg, 
        hsl(var(--primary-hue), var(--primary-saturation), 65%),
        hsl(var(--accent-hue), 85%, 65%)
    );
    color: white;
    box-shadow: 
        0 2px 4px rgba(var(--primary-hue), var(--primary-saturation), 50%, 0.1),
        0 4px 8px rgba(var(--primary-hue), var(--primary-saturation), 50%, 0.1),
        0 8px 16px rgba(var(--primary-hue), var(--primary-saturation), 50%, 0.1),
        inset 0 2px 4px rgba(255, 255, 255, 0.2);
}

.hero-btn.primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        120deg,
        transparent,
        rgba(255, 255, 255, 0.6),
        transparent
    );
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.hero-btn.primary:hover {
    transform: translateY(-3px);
    box-shadow: 
        0 4px 8px rgba(var(--primary-hue), var(--primary-saturation), 50%, 0.2),
        0 8px 16px rgba(var(--primary-hue), var(--primary-saturation), 50%, 0.2),
        0 16px 32px rgba(var(--primary-hue), var(--primary-saturation), 50%, 0.2),
        inset 0 2px 4px rgba(255, 255, 255, 0.4);
}

.hero-btn.primary:hover::before {
    transform: translateX(100%);
}

/* Secondary Hero Button */
.hero-btn.secondary {
    background: var(--glass-background);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    box-shadow: 
        0 2px 4px rgba(0, 0, 0, 0.05),
        0 4px 8px rgba(0, 0, 0, 0.05),
        inset 0 2px 4px rgba(255, 255, 255, 0.1);
}

.hero-btn.secondary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg,
        rgba(var(--primary-hue), var(--primary-saturation), 50%, 0.1),
        rgba(var(--accent-hue), 85%, 50%, 0.1)
    );
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.hero-btn.secondary:hover {
    transform: translateY(-3px);
    border-color: var(--primary-color);
    box-shadow: 
        0 4px 8px rgba(var(--primary-hue), var(--primary-saturation), 50%, 0.1),
        0 8px 16px rgba(var(--primary-hue), var(--primary-saturation), 50%, 0.1),
        inset 0 2px 4px rgba(255, 255, 255, 0.2);
}

.hero-btn.secondary:hover::before {
    opacity: 1;
}

/* Create Task Form */
.create-task-form {
    background: var(--glass-background);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--spacing-xl);
    position: relative;
    overflow: hidden;
}

.create-task-form::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg,
        rgba(var(--primary-hue), var(--primary-saturation), 50%, 0.1),
        rgba(var(--accent-hue), 85%, 50%, 0.1));
    opacity: 0.5;
    z-index: 0;
}

.form-header {
    position: relative;
    margin-bottom: var(--spacing-xl);
    text-align: center;
    z-index: 1;
}

.form-header h2 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.form-header p {
    color: var(--text-secondary);
    font-size: var(--font-size-md);
}

.form-group {
    position: relative;
    margin-bottom: var(--spacing-lg);
    z-index: 1;
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    font-weight: 500;
    font-size: var(--font-size-sm);
}

.form-control {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--surface-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: var(--font-size-md);
    transition: all var(--transition-normal);
}

.form-control:hover {
    border-color: var(--border-color-hover);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px hsla(var(--primary-hue), var(--primary-saturation), 50%, 0.15);
}

/* Submit Button */
.submit-btn {
    position: relative;
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    overflow: hidden;
}

.submit-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg,
        rgba(255, 255, 255, 0.1),
        rgba(255, 255, 255, 0.05));
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 
        var(--shadow-primary),
        0 0 0 4px hsla(var(--primary-hue), var(--primary-saturation), 50%, 0.2);
}

.submit-btn:hover::before {
    opacity: 1;
}

/* Animations */
@keyframes titleGradient {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

/* Glowing Effect */
.glow-effect {
    position: relative;
    overflow: hidden;
}

.glow-effect::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(
        circle at center,
        rgba(var(--primary-hue), var(--primary-saturation), 50%, 0.1) 0%,
        rgba(var(--primary-hue), var(--primary-saturation), 50%, 0.05) 30%,
        transparent 70%
    );
    animation: rotate 15s linear infinite;
    z-index: -1;
}

@keyframes rotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* Floating Cards */
.floating-card {
    position: absolute;
    background: var(--glass-background);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: 
        0 4px 12px rgba(0, 0, 0, 0.1),
        0 8px 24px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    min-width: 240px;
    border: 1px solid var(--glass-border);
    animation: float 6s ease-in-out infinite;
    transform-origin: center center;
}

.floating-card .card-icon {
    font-size: var(--font-size-2xl);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.floating-card .card-content {
    flex: 1;
}

.floating-card h4 {
    font-size: var(--font-size-md);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.floating-card p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin: 0;
}

.card-1 {
    top: 10%;
    left: 5%;
    animation-delay: 0s;
}

.card-2 {
    top: 25%;
    right: 5%;
    animation-delay: -1.5s;
}

.card-3 {
    bottom: 25%;
    left: 10%;
    animation-delay: -3s;
}

.card-4 {
    bottom: 10%;
    right: 10%;
    animation-delay: -4.5s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-10px) rotate(2deg);
    }
    75% {
        transform: translateY(10px) rotate(-2deg);
    }
}

/* Dark Theme Adjustments */
.dark-theme .floating-card {
    background: var(--dark-glass-background);
    border-color: var(--dark-glass-border);
    box-shadow: 
        0 4px 12px rgba(0, 0, 0, 0.2),
        0 8px 24px rgba(0, 0, 0, 0.2);
}

/* Features Section */
.features-section {
    padding: var(--spacing-xl) var(--spacing-lg);
    background-color: var(--surface-light);
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: var(--background-light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
    border: 1px solid var(--border-light);
}

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

.feature-icon {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    .app {
        background-color: var(--background-dark);
        color: white;
    }

    .main-nav {
        background-color: var(--surface-dark);
        border-color: var(--border-dark);
    }

    .brand-link {
        color: white;
    }

    .nav-item {
        color: var(--text-secondary);
    }

    .nav-item:hover {
        background-color: var(--surface-light);
        color: var(--text-primary);
    }

    .features-section {
        background-color: var(--surface-dark);
    }

    .feature-card {
        background-color: var(--background-dark);
        border: 1px solid var(--border-dark);
    }
}

/* Small Screen Adjustments */
@media (max-width: 480px) {
    .main-nav {
        padding: var(--spacing-sm);
    }

    .hero-section {
        padding: var(--spacing-md);
    }

    .hero-title {
        font-size: var(--font-size-xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-md);
    }

    .hero-actions {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .primary-btn,
    .secondary-btn {
        width: 100%;
        justify-content: center;
    }

    .hero-illustration {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

.task-view-container {
    padding: var(--spacing-lg);
    margin-top: 64px; /* Height of the navigation bar */
}