/**
 * Topmate Clone - Custom CSS
 * Modern, responsive design with clean layout
 */

/* CSS Variables for consistent theming */
:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #f8fafc;
    --accent-color: #10b981;
    --accent-purple: #a855f7;
    --accent-pink: #ec4899;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --border-color: #e5e7eb;
    --border-light: #f3f4f6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

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

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

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

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

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

@keyframes gradient {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(to bottom, #ffffff 0%, #f8fafc 100%);
    font-size: 16px;
    min-height: 100vh;
}

/* Container and layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-sm {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header and Navigation */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: color 0.2s;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.875rem;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

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

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

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

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

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
}

/* Cards */
.card {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-purple), var(--accent-pink));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.card:hover::before {
    transform: scaleX(1);
}

.card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-8px);
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--secondary-color);
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    background-color: var(--secondary-color);
    border-top: 1px solid var(--border-color);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgb(99 102 241 / 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-error {
    color: var(--error-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.form-success {
    color: var(--success-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* Profile specific styles */
.profile-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 3rem 0;
    margin-bottom: 2rem;
}

.profile-info {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.profile-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 4px solid white;
    object-fit: cover;
    box-shadow: var(--shadow-lg);
}

.profile-details h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.profile-details p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.skill-tag {
    background-color: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
}

/* Booking calendar */
.booking-calendar {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1px;
    background-color: var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.calendar-header {
    background-color: var(--primary-color);
    color: white;
    padding: 0.75rem;
    text-align: center;
    font-weight: 600;
}

.calendar-day {
    background-color: white;
    padding: 1rem;
    text-align: center;
    min-height: 80px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    cursor: pointer;
    transition: background-color 0.2s;
}

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

.calendar-day.available {
    background-color: var(--success-color);
    color: white;
}

.calendar-day.available:hover {
    background-color: #059669;
}

.calendar-day.booked {
    background-color: var(--error-color);
    color: white;
    cursor: not-allowed;
}

/* Time slots */
.time-slots {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.5rem;
    margin-top: 1rem;
}

.time-slot {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background-color: white;
}

.time-slot:hover {
    border-color: var(--primary-color);
    background-color: var(--secondary-color);
}

.time-slot.selected {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.time-slot.booked {
    background-color: var(--border-light);
    color: var(--text-light);
    cursor: not-allowed;
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.table th,
.table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background-color: var(--secondary-color);
    font-weight: 600;
    color: var(--text-primary);
}

.table tbody tr:hover {
    background-color: var(--secondary-color);
}

/* Status badges */
.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.status-pending {
    background-color: #fef3c7;
    color: #92400e;
}

.status-confirmed {
    background-color: #d1fae5;
    color: #065f46;
}

.status-cancelled {
    background-color: #fee2e2;
    color: #991b1b;
}

.status-completed {
    background-color: #dbeafe;
    color: #1e40af;
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    border: 1px solid;
}

.alert-success {
    background-color: #d1fae5;
    border-color: var(--success-color);
    color: #065f46;
}

.alert-error {
    background-color: #fee2e2;
    border-color: var(--error-color);
    color: #991b1b;
}

.alert-warning {
    background-color: #fef3c7;
    border-color: var(--warning-color);
    color: #92400e;
}

/* Grid system */
.grid {
    display: grid;
    gap: 2rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

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

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

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.d-flex {
    display: flex;
}

.justify-between {
    justify-content: space-between;
}

.align-center {
    align-items: center;
}

.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }

/* Expert Card Enhancements */
.expert-card {
    animation: fadeInUp 0.6s ease-out;
}

.expert-card:nth-child(1) { animation-delay: 0.1s; }
.expert-card:nth-child(2) { animation-delay: 0.2s; }
.expert-card:nth-child(3) { animation-delay: 0.3s; }
.expert-card:nth-child(4) { animation-delay: 0.4s; }
.expert-card:nth-child(5) { animation-delay: 0.5s; }
.expert-card:nth-child(6) { animation-delay: 0.6s; }

.expert-avatar {
    position: relative;
    transition: transform 0.3s ease;
}

.expert-card:hover .expert-avatar {
    transform: scale(1.1) rotate(5deg);
}

/* Feature Cards */
.feature-card {
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    transition: transform 0.5s ease;
}

.feature-card:hover .feature-icon {
    transform: rotate(360deg) scale(1.1);
}

/* Skill Tags */
.skill-tag-animated {
    transition: all 0.2s ease;
    cursor: pointer;
}

.skill-tag-animated:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(99, 102, 241, 0.2);
}

/* Hero Section Animations */
.hero-animated {
    animation: fadeIn 1s ease-out;
}

/* Gradient Button */
.btn-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-purple), var(--accent-pink));
    background-size: 200% 200%;
    animation: gradient 3s ease infinite;
    border: none;
    color: white;
    position: relative;
    overflow: hidden;
}

.btn-gradient::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-gradient:hover::before {
    width: 300px;
    height: 300px;
}

/* Responsive design */
@media (max-width: 768px) {
    .nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .profile-info {
        flex-direction: column;
        text-align: center;
    }
    
    .profile-image {
        width: 100px;
        height: 100px;
    }
    
    .booking-calendar {
        grid-template-columns: repeat(1, 1fr);
    }
    
    .calendar-day {
        min-height: 60px;
    }
    
    .time-slots {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    }
    
    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
}