/* ===========================
   RESET & FONT IMPORTS
   =========================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

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

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
}

/* ===========================
   CSS VARIABLES - DARK THEME
   =========================== */
:root {
    /* Core Colors */
    --color-bg-primary: #0a0a0a;
    --color-bg-secondary: #111111;
    --color-bg-tertiary: #1a1a1a;
    
    /* Surface Colors */
    --color-surface-primary: rgba(255, 255, 255, 0.04);
    --color-surface-secondary: rgba(255, 255, 255, 0.06);
    --color-surface-hover: rgba(255, 255, 255, 0.08);
    --color-surface-active: rgba(255, 255, 255, 0.12);
    
    /* Text Colors */
    --color-text-primary: rgba(255, 255, 255, 0.95);
    --color-text-secondary: rgba(255, 255, 255, 0.7);
    --color-text-tertiary: rgba(255, 255, 255, 0.5);
    --color-text-quaternary: rgba(255, 255, 255, 0.3);
    
    /* Brand Colors */
    --color-brand-primary: #6366f1;
    --color-brand-secondary: #4f46e5;
    --color-brand-tertiary: #818cf8;
    --color-brand-accent: #a855f7;
    
    /* Semantic Colors */
    --color-success: #10b981;
    --color-success-light: #34d399;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    
    /* Borders */
    --color-border-primary: rgba(255, 255, 255, 0.08);
    --color-border-secondary: rgba(255, 255, 255, 0.12);
    --color-border-focus: var(--color-brand-primary);
    
    /* Gradients */
    --gradient-brand: linear-gradient(135deg, #6366f1 0%, #4f46e5 50%, #a855f7 100%);
    --gradient-brand-hover: linear-gradient(135deg, #4f46e5 0%, #6366f1 50%, #4f46e5 100%);
    --gradient-surface: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(168, 85, 247, 0.04) 100%);
    --gradient-hero: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(168, 85, 247, 0.05) 50%, rgba(16, 185, 129, 0.03) 100%);
    
    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.6);
    --shadow-2xl: 0 24px 64px rgba(0, 0, 0, 0.7);
    
    /* Spacing Scale */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Border Radius */
    --radius-xs: 0.25rem;
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-3xl: 2rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 300ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ===========================
   CSS VARIABLES - LIGHT THEME
   =========================== */
[data-theme="light"] {
    /* Core Colors */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #fafafa;
    --color-bg-tertiary: #f5f5f5;
    
    /* Surface Colors */
    --color-surface-primary: rgba(0, 0, 0, 0.02);
    --color-surface-secondary: rgba(0, 0, 0, 0.04);
    --color-surface-hover: rgba(0, 0, 0, 0.06);
    --color-surface-active: rgba(0, 0, 0, 0.08);
    
    /* Text Colors */
    --color-text-primary: rgba(0, 0, 0, 0.9);
    --color-text-secondary: rgba(0, 0, 0, 0.7);
    --color-text-tertiary: rgba(0, 0, 0, 0.5);
    --color-text-quaternary: rgba(0, 0, 0, 0.3);
    
    /* Borders */
    --color-border-primary: rgba(0, 0, 0, 0.08);
    --color-border-secondary: rgba(0, 0, 0, 0.12);
    
    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
    --shadow-2xl: 0 24px 64px rgba(0, 0, 0, 0.15);
}

/* ===========================
   BASE LAYOUT & TYPOGRAPHY
   =========================== */
body {
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* Container */
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Typography Scale */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

h1 { 
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.1;
}

h2 { 
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
}

h3 { 
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
    letter-spacing: -0.02em;
}

h4 {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

p {
    color: var(--color-text-secondary);
    line-height: 1.7;
    font-weight: 400;
}

/* Links */
a {
    color: var(--color-brand-primary);
    text-decoration: none;
    transition: all var(--transition-fast);
    font-weight: 500;
}

a:hover {
    color: var(--color-brand-secondary);
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 2px;
}

/* Focus States */
:focus {
    outline: none;
}

:focus-visible {
    outline: 2px solid var(--color-brand-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* ===========================
   BACKGROUND ANIMATION
   =========================== */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.bg-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-hero);
    opacity: 0.6;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(40px);
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

.orb1 {
    width: 300px;
    height: 300px;
    background: var(--color-brand-primary);
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.orb2 {
    width: 200px;
    height: 200px;
    background: var(--color-brand-accent);
    top: 60%;
    right: 15%;
    animation-delay: -7s;
}

.orb3 {
    width: 150px;
    height: 150px;
    background: var(--color-success);
    bottom: 20%;
    left: 20%;
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    33% {
        transform: translateY(-30px) rotate(120deg);
    }
    66% {
        transform: translateY(20px) rotate(240deg);
    }
}

/* ===========================
   NAVIGATION & HEADER
   =========================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border-primary);
    transition: all var(--transition-base);
}

[data-theme="light"] .nav {
    background: rgba(255, 255, 255, 0.8);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 1.375rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
    text-decoration: none;
}

.logo:hover {
    color: var(--color-text-primary);
    text-decoration: none;
}

.logo-icon {
    width: 44px;
    height: 44px;
    background: var(--gradient-brand);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.375rem;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.logo:hover .logo-icon {
    transform: scale(1.05) rotate(5deg);
    box-shadow: var(--shadow-lg);
}

.theme-toggle {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-xl);
    background: var(--color-surface-primary);
    border: 1px solid var(--color-border-primary);
    color: var(--color-text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
}

.theme-toggle:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-border-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Hero Section */
.hero {
    padding: calc(100px + var(--spacing-4xl)) var(--spacing-lg) var(--spacing-4xl);
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.hero h1 {
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 1s ease-out;
}

.hero .subtitle {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero .description {
    font-size: 1.25rem;
    color: var(--color-text-tertiary);
    line-height: 1.8;
    max-width: 600px;
    margin: 0 auto;
    animation: fadeInUp 1s ease-out 0.4s both;
}

/* ===========================
   CARDS & COMPONENTS
   =========================== */
.card {
    background: var(--color-surface-primary);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    position: relative;
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-brand);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.card:hover {
    background: var(--color-surface-secondary);
    border-color: var(--color-border-secondary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

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

/* Section Headers */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: 1.375rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    color: var(--color-text-primary);
}

.section-icon {
    width: 52px;
    height: 52px;
    background: var(--gradient-brand);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow-md);
}

/* Section Instructions */
.section-instructions {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--color-surface-secondary);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--color-brand-primary);
}

.section-instructions p {
    margin: 0;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
}

.widget-instructions {
    margin-bottom: var(--spacing-lg);
}

.widget-instructions p {
    margin: 0;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
}

/* Main Grid Layout */
.main-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-lg) var(--spacing-4xl);
}

/* Locations Card - Full Width */
.locations-card {
    margin-bottom: var(--spacing-2xl);
}

/* Widgets Grid - 50/50 Layout */
.widgets-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

/* Share Section */
.share-section {
    max-width: 400px;
    margin: 0 auto;
}

/* Legacy Grid Support */
.main-grid {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--spacing-2xl);
    align-items: start;
}

@media (max-width: 1200px) {
    .widgets-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xl);
    }
    
    .main-grid {
        grid-template-columns: 1fr 350px;
    }
}

@media (max-width: 1024px) {
    .widgets-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .main-grid {
        grid-template-columns: 1fr;
    }
    
    .share-section {
        max-width: 100%;
    }
}

/* ===========================
   FORM ELEMENTS
   =========================== */
.input-wrapper {
    position: relative;
    margin-bottom: var(--spacing-lg);
}

.input-group {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--color-bg-secondary);
    border: 2px solid var(--color-border-primary);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
    overflow: hidden;
}

.input-group:hover {
    border-color: var(--color-border-secondary);
    background: var(--color-surface-primary);
}

.input-group:focus-within {
    border-color: var(--color-brand-primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    background: var(--color-surface-primary);
}

.input-icon {
    padding: var(--spacing-lg);
    font-size: 1.25rem;
    color: var(--color-text-tertiary);
    transition: color var(--transition-base);
}

.input-group:focus-within .input-icon {
    color: var(--color-brand-primary);
}

.modern-input {
    flex: 1;
    padding: var(--spacing-lg);
    padding-left: 0;
    background: transparent;
    border: none;
    color: var(--color-text-primary);
    font-size: 1rem;
    font-weight: 500;
    outline: none;
}

.modern-input::placeholder {
    color: var(--color-text-quaternary);
    font-weight: 400;
}

/* Custom Toggle Switch */
.toggle-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.toggle {
    position: relative;
    width: 56px;
    height: 32px;
    background: var(--color-bg-tertiary);
    border: 2px solid var(--color-border-primary);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-base);
}

.toggle input {
    display: none;
}

.toggle-slider {
    position: absolute;
    top: 4px;
    left: 4px;
    width: 20px;
    height: 20px;
    background: var(--color-text-tertiary);
    border-radius: var(--radius-full);
    transition: all var(--transition-bounce);
    box-shadow: var(--shadow-sm);
}

.toggle input:checked + .toggle-slider {
    left: 28px;
    background: var(--color-brand-primary);
    transform: scale(1.1);
}

.toggle input:checked ~ .toggle {
    border-color: var(--color-brand-primary);
    background: rgba(99, 102, 241, 0.1);
}

/* Time Format Toggle */
.time-format-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: auto;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

.toggle.small {
    transform: scale(0.8);
    margin: 0 0.25rem;
}

.toggle-label {
    font-weight: 500;
    user-select: none;
}

.section-title,
.widget-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Select Elements */
select {
    appearance: none;
    background: var(--color-bg-secondary);
    border: 2px solid var(--color-border-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--color-text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

select:hover {
    border-color: var(--color-border-secondary);
    background-color: var(--color-surface-primary);
}

select:focus {
    border-color: var(--color-brand-primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* ===========================
   BUTTONS & INTERACTIVE
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    white-space: nowrap;
    text-decoration: none;
    font-family: inherit;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn-primary {
    background: var(--gradient-brand);
    color: white;
    box-shadow: var(--shadow-md);
    font-weight: 600;
}

.btn-primary:hover:not(:disabled) {
    background: var(--gradient-brand-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--color-surface-primary);
    color: var(--color-text-primary);
    border: 2px solid var(--color-border-primary);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-surface-hover);
    border-color: var(--color-border-secondary);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border: 2px solid transparent;
}

.btn-ghost:hover:not(:disabled) {
    background: var(--color-surface-primary);
    border-color: var(--color-border-primary);
    color: var(--color-text-primary);
}

.btn-icon {
    width: 52px;
    height: 52px;
    padding: 0;
    border-radius: var(--radius-xl);
    font-size: 1.125rem;
}

/* Day Selector Chips */
.day-selector {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.day-chip {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-surface-primary);
    border: 2px solid var(--color-border-primary);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
    min-width: 60px;
    text-align: center;
}

.day-chip:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-border-secondary);
    transform: translateY(-1px);
}

.day-chip.active {
    background: var(--gradient-brand);
    color: white;
    border-color: var(--color-brand-primary);
    box-shadow: var(--shadow-md);
}

.day-chip.weekend {
    color: var(--color-warning);
    border-color: rgba(245, 158, 11, 0.3);
}

.day-chip.weekend:hover {
    border-color: var(--color-warning);
    background: rgba(245, 158, 11, 0.1);
}

/* ===========================
   TIME GRID & VISUALIZATION
   =========================== */
.time-grid-container {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    overflow-x: auto;
    overflow-y: hidden;
    border: 1px solid var(--color-border-primary);
}

.time-grid-header {
    display: grid;
    grid-template-columns: 200px repeat(24, minmax(50px, 1fr));
    gap: 4px;
    margin-bottom: var(--spacing-lg);
}

.time-header {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-tertiary);
    text-align: center;
    padding: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.location-grid {
    display: grid;
    gap: var(--spacing-md);
}

.location-row {
    display: grid;
    grid-template-columns: 200px repeat(24, minmax(50px, 1fr));
    gap: 4px;
    align-items: center;
}

.location-label {
    padding: var(--spacing-lg);
    background: var(--color-surface-primary);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    border: 1px solid var(--color-border-primary);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.location-label:hover {
    background: var(--color-surface-secondary);
    box-shadow: var(--shadow-md);
}

.location-dot {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-full);
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.time-cell {
    aspect-ratio: 1;
    background: var(--color-surface-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-tertiary);
    transition: all var(--transition-fast);
    cursor: default;
    border: 1px solid var(--color-border-primary);
    position: relative;
    overflow: hidden;
    min-height: 44px;
}

.time-cell::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-brand);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.time-cell:hover {
    transform: scale(1.15);
    z-index: 10;
    box-shadow: var(--shadow-lg);
}

.time-cell.business {
    background: rgba(16, 185, 129, 0.15);
    color: var(--color-success);
    border-color: rgba(16, 185, 129, 0.3);
}

.time-cell.business::before {
    background: var(--color-success);
    opacity: 0.1;
}

.time-cell.overlap {
    background: var(--gradient-brand);
    color: white;
    font-weight: 700;
    cursor: pointer;
    border-color: var(--color-brand-primary);
    box-shadow: var(--shadow-sm);
}

.time-cell.overlap:hover {
    transform: scale(1.2);
    box-shadow: var(--shadow-lg);
}

.time-cell.weekend {
    opacity: 0.4;
}

/* Grid Legend */
.grid-legend {
    display: flex;
    gap: var(--spacing-xl);
    justify-content: center;
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--color-surface-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-primary);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border-primary);
}

.legend-color.business {
    background: rgba(16, 185, 129, 0.15);
    border-color: rgba(16, 185, 129, 0.3);
}

.legend-color.overlap {
    background: var(--gradient-brand);
    border-color: var(--color-brand-primary);
}

.legend-color.off-hours {
    background: var(--color-surface-primary);
    border-color: var(--color-border-primary);
}

/* Recommendation Card */
.recommendation-card {
    background: var(--gradient-brand);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-3xl);
    color: white;
    margin-top: var(--spacing-2xl);
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
}

.recommendation-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.3;
}

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

.recommendation-content h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-xl);
    font-weight: 700;
}

.time-slot {
    display: inline-flex;
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-full);
    margin: var(--spacing-sm);
    font-weight: 600;
    font-size: 0.875rem;
    transition: all var(--transition-base);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.time-slot:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

/* ===========================
   WIDGETS & SIDEBAR
   =========================== */
.widget {
    margin-bottom: var(--spacing-xl);
}

.widget-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--color-text-primary);
}

.widget-icon {
    width: 40px;
    height: 40px;
    background: var(--color-surface-secondary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    border: 1px solid var(--color-border-primary);
}

/* Clock Widget */
.clock-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    background: var(--color-surface-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    transition: all var(--transition-base);
    border: 1px solid var(--color-border-primary);
}

.clock-item:hover {
    background: var(--color-surface-hover);
    transform: translateX(4px);
    border-color: var(--color-border-secondary);
}

.clock-time {
    font-size: 1.25rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--color-brand-primary);
    letter-spacing: -0.02em;
}

.clock-location {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.clock-details {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.weather-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-3);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-4xl);
}

.feature-card {
    background: var(--color-surface-primary);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-brand);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.feature-card:hover {
    background: var(--color-surface-secondary);
    border-color: var(--color-border-secondary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-brand);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.feature-card h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.feature-card p {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ===========================
   FOOTER
   =========================== */
.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border-primary);
    padding: var(--spacing-4xl) 0 var(--spacing-2xl);
    margin-top: var(--spacing-4xl);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
}

.footer-section h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
}

.footer-section p {
    margin-bottom: var(--spacing-sm);
    font-size: 0.875rem;
}

.footer-section a {
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg) 0;
    border-top: 1px solid var(--color-border-primary);
    margin-top: var(--spacing-2xl);
    text-align: center;
    color: var(--color-text-tertiary);
    font-size: 0.875rem;
}

/* ===========================
   LOADING STATES & ANIMATIONS
   =========================== */
.skeleton {
    background: linear-gradient(
        90deg, 
        var(--color-surface-primary) 25%, 
        var(--color-surface-secondary) 50%, 
        var(--color-surface-primary) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-lg);
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

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

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* ===========================
   SCROLLBAR & UTILITIES
   =========================== */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--color-surface-hover);
    border-radius: var(--radius-sm);
    border: 2px solid var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-border-secondary);
}

/* Utility Classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.animate-in {
    animation: fadeInUp 0.8s ease-out;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

/* ===========================
   RESPONSIVE DESIGN
   =========================== */
@media (max-width: 1200px) {
    .main-grid {
        grid-template-columns: 1fr 350px;
    }
    
    .time-grid-header,
    .location-row {
        grid-template-columns: 160px repeat(24, minmax(40px, 1fr));
    }
}

@media (max-width: 1024px) {
    .main-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    :root {
        font-size: 14px;
    }
    
    .hero {
        padding: calc(100px + var(--spacing-3xl)) var(--spacing-md) var(--spacing-3xl);
    }
    
    .card {
        padding: var(--spacing-xl);
    }
    
    .widgets-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .time-grid-header,
    .location-row {
        grid-template-columns: 140px repeat(24, minmax(35px, 1fr));
    }
    
    .day-selector {
        gap: var(--spacing-xs);
    }
    
    .day-chip {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.813rem;
        min-width: 50px;
    }
    
    .grid-legend {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .logo {
        font-size: 1.25rem;
    }
    
    .logo-icon {
        width: 40px;
        height: 40px;
    }
    
    .theme-toggle {
        width: 44px;
        height: 44px;
    }
    
    .time-grid-header,
    .location-row {
        grid-template-columns: 120px repeat(24, minmax(30px, 1fr));
    }
    
    .btn {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 0.813rem;
    }
}

/* ===========================
   ADDITIONAL ENHANCEMENTS
   =========================== */
/* DST Warning Badge */
.dst-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: var(--radius-lg);
    color: var(--color-warning);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xl);
}

/* Hours Input Group */
.hours-input-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-surface-primary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-primary);
}

.hours-input-group span {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

.time-input {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-base);
}

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

/* Autocomplete */
.autocomplete {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 100;
    max-height: 200px;
    overflow-y: auto;
    display: none;
}

.autocomplete-item {
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    transition: background var(--transition-fast);
    border-bottom: 1px solid var(--color-border-primary);
}

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

.autocomplete-item:hover {
    background: var(--color-surface-hover);
}

.autocomplete-item.active {
    background: var(--color-brand-primary);
    color: white;
}

/* Converter Result */
#converterResult {
    background: var(--gradient-brand);
    color: white;
    font-weight: 700;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

#converterResult:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--color-border-primary);
    border-top-color: var(--color-brand-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Focus States for Better Accessibility */
.btn:focus-visible,
.input-group:focus-within,
.toggle:focus-within,
select:focus,
.time-input:focus {
    outline: 2px solid var(--color-brand-primary);
    outline-offset: 2px;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Print Styles */
@media print {
    .nav,
    .bg-animation,
    .theme-toggle,
    .btn {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .card {
        border: 1px solid #ccc !important;
        box-shadow: none !important;
    }
}