/* ========================================
   PROFESSIONAL UI DESIGN - GLOBAL STYLES
   Clean, Modern & Responsive
   ======================================== */

/* Import Professional Font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* CSS Variables - Professional Color Scheme */
:root {
    /* Exact Color Palette */
    --primary: #111111;
    --primary-hover: #000000;
    --secondary: #6B7280;
    --accent: #3B82F6;
    
    --bg-white: #FFFFFF;
    --bg-section: #F5F5F5;
    --bg-card: #FFFFFF;
    
    --text-primary: #111111;
    --text-secondary: #6B7280;
    
    --border: #E5E5E5;
    --rating-star: #F59E0B;
    
    /* Professional Shadows - Subtle */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.10);
    
    /* Professional Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;
    --spacing-3xl: 96px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --radius-2xl: 24px;
    --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);
}

/* Global Resets */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-primary);
    background: var(--bg-white);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    letter-spacing: -0.01em;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: 36px; }
h2 { font-size: 28px; }
h3 { font-size: 22px; }
h4 { font-size: 18px; }
h5 { font-size: 16px; }
h6 { font-size: 14px; }

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

a {
    color: var(--accent);
    text-decoration: none;
    transition: all var(--transition-base);
}

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

/* Buttons - Professional */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 15px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

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

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

.btn-secondary {
    background: var(--bg-section);
    color: var(--text-primary);
    border-color: var(--border);
}

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

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

.btn-accent:hover {
    background: #2563EB;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 14px;
}

/* Cards - Professional */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    padding: var(--spacing-md);
    transition: all var(--transition-base);
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-sm);
    border-color: var(--accent);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border);
}

.card-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.card-body {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Sections */
.section {
    padding: var(--spacing-3xl) 0;
}

.section-light {
    background: var(--bg-section);
}

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

.section-title {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-title i {
    color: var(--accent);
    font-size: 24px;
}

/* Forms - Professional */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    font-size: 14px;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 15px;
    font-family: inherit;
    transition: all var(--transition-base);
    background: var(--bg-white);
    color: var(--text-primary);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-control::placeholder {
    color: var(--secondary);
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
}

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

.badge-secondary {
    background: var(--bg-section);
    color: var(--text-secondary);
}

.badge-accent {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent);
}

.badge-success {
    background: #F0FDF4;
    color: #166534;
}

.badge-warning {
    background: #FEF3C7;
    color: #92400E;
}

.badge-danger {
    background: #FEE2E2;
    color: #991B1B;
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in { animation: fadeIn 0.5s ease-out; }
.fade-in-up { animation: fadeInUp 0.6s ease-out; }
.slide-in { animation: slideIn 0.5s ease-out; }

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

a:focus-visible,
button:focus-visible,
.form-control:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    h1 { font-size: 28px; }
    h2 { font-size: 24px; }
    h3 { font-size: 20px; }
    
    .section {
        padding: var(--spacing-2xl) 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    h1 { font-size: 24px; }
    h2 { font-size: 20px; }
    h3 { font-size: 18px; }
}