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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8fafc;
}

/* Page Management */
.page {
    display: none;
    min-height: 100vh;
}

.page.active {
    display: block;
}

/* Navigation */
.navbar {
    background: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: 600;
    font-size: 1.25rem;
    color: #4f46e5;
}

.logo {
    color: #4f46e5;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-link {
    color: #6b7280;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all 0.2s;
    font-weight: 500;
}

.nav-link:hover {
    color: #4f46e5;
    background: #f3f4f6;
}

.user-greeting {
    color: #374151;
    font-weight: 500;
    margin-right: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.875rem;
}

.btn-primary {
    background: #4f46e5;
    color: white;
}

.btn-primary:hover {
    background: #4338ca;
}

.btn-outline {
    background: transparent;
    color: #4f46e5;
    border: 1px solid #4f46e5;
}

.btn-outline:hover {
    background: #4f46e5;
    color: white;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn-full {
    width: 100%;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
}

/* Landing Page */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 6rem 0;
    color: white;
    text-align: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.text-accent {
    color: #fbbf24;
}

.hero-description {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.9;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.features-section {
    padding: 6rem 0;
    background: white;
}

.features-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #111827;
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.125rem;
    color: #6b7280;
}

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

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: all 0.2s;
    border: 1px solid #e5e7eb;
}

.feature-card:hover {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #111827;
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: #6b7280;
    line-height: 1.6;
}

/* Auth Pages */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}

.auth-card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    width: 100%;
    max-width: 500px;
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: #111827;
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: #6b7280;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    font-weight: 500;
    color: #374151;
}

.form-input, .form-select, .form-textarea {
    padding: 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 0.875rem;
    transition: border-color 0.2s;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    outline: none;
    border-color: #4f46e5;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

.user-type-selection {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.user-type-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.5rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    background: white;
    cursor: pointer;
    transition: all 0.2s;
}

.user-type-btn:hover {
    border-color: #4f46e5;
}

.user-type-btn.selected {
    border-color: #4f46e5;
    background: #eef2ff;
}

.user-type-icon {
    font-size: 2rem;
}

.user-type-text {
    font-weight: 500;
    color: #374151;
}

.error-message {
    background: #fef2f2;
    color: #dc2626;
    padding: 0.75rem;
    border-radius: 6px;
    border: 1px solid #fecaca;
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    color: #6b7280;
}

.auth-footer a {
    color: #4f46e5;
    text-decoration: none;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* Dashboard */
.dashboard-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.dashboard-header {
    text-align: center;
    margin-bottom: 3rem;
}

.dashboard-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #111827;
    margin-bottom: 0.5rem;
}

.dashboard-header p {
    font-size: 1.125rem;
    color: #6b7280;
}

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

.dashboard-card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    padding: 2rem;
    text-align: center;
    transition: all 0.2s;
    border: 1px solid #e5e7eb;
}

.dashboard-card:hover {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.card-icon {
    color: #4f46e5;
    margin-bottom: 1rem;
}

.card-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #111827;
    margin-bottom: 0.75rem;
}

.card-content p {
    color: #6b7280;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

/* Profile Page */
.profile-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.profile-header {
    text-align: center;
    margin-bottom: 3rem;
}

.profile-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #111827;
    margin-bottom: 0.5rem;
}

.profile-header p {
    font-size: 1.125rem;
    color: #6b7280;
}

.profile-form {
    background: white;
    border-radius: 12px;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    padding: 2rem;
}

.form-section {
    margin-bottom: 2.5rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid #e5e7eb;
}

.form-section:last-of-type {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.form-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #111827;
    margin-bottom: 1.5rem;
}

.form-description {
    color: #6b7280;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

/* Profile Picture */
.profile-picture-section {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
}

.profile-picture-preview {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid #e5e7eb;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f9fafb;
}

.profile-picture-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.picture-placeholder {
    text-align: center;
    color: #9ca3af;
}

.picture-placeholder svg {
    margin-bottom: 0.5rem;
}

.picture-placeholder p {
    font-size: 0.75rem;
    margin: 0;
}

.profile-picture-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    flex: 1;
}

/* Skills and Categories */
.skills-search-container,
.categories-search-container {
    position: relative;
    margin-bottom: 1rem;
}

.suggestions-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border: 1px solid #d1d5db;
    border-top: none;
    border-radius: 0 0 6px 6px;
    max-height: 200px;
    overflow-y: auto;
    z-index: 10;
    display: none;
}

.suggestions-dropdown.show {
    display: block;
}

.suggestion-item {
    padding: 0.75rem;
    cursor: pointer;
    border-bottom: 1px solid #f3f4f6;
    transition: background-color 0.2s;
}

.suggestion-item:hover {
    background: #f9fafb;
}

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

.selected-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    min-height: 40px;
    padding: 0.75rem;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    background: #f9fafb;
}

.selected-item {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: #4f46e5;
    color: white;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
}

.remove-btn {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    padding: 0;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

.remove-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
}

/* Messages Page */
.messages-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.messages-header {
    text-align: center;
    margin-bottom: 3rem;
}

.messages-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #111827;
    margin-bottom: 0.5rem;
}

.messages-header p {
    font-size: 1.125rem;
    color: #6b7280;
}

.messages-content {
    background: white;
    border-radius: 12px;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    padding: 3rem;
    text-align: center;
    color: #6b7280;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-description {
        font-size: 1.125rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-large {
        width: 100%;
        max-width: 300px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .user-type-selection {
        grid-template-columns: 1fr;
    }
    
    .profile-picture-section {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .profile-picture-actions {
        width: 100%;
        max-width: 300px;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .nav-menu {
        gap: 0.5rem;
    }
    
    .nav-link {
        padding: 0.5rem;
        font-size: 0.875rem;
    }
    
    .user-greeting {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero-section {
        padding: 4rem 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .features-section,
    .dashboard-container,
    .profile-container,
    .messages-container {
        padding: 2rem 0.5rem;
    }
    
    .auth-card {
        padding: 1.5rem;
    }
    
    .profile-form {
        padding: 1.5rem;
    }
}