/* Reset y estilos base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #f9fafb;
    --card-bg: #ffffff;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* Header */
header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1.5rem 0;
    box-shadow: var(--shadow);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

header h1 {
    font-size: 1.75rem;
    font-weight: 700;
}

nav {
    display: flex;
    gap: 1rem;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: background-color 0.3s;
}

nav a:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

nav a.active {
    background-color: rgba(255, 255, 255, 0.3);
    font-weight: 600;
}

/* Main content */
main {
    flex: 1;
    padding: 2rem 0;
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

/* Project Card */
.project-card {
    background: var(--card-bg);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.project-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.project-image-placeholder {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
}

.project-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.project-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.project-description {
    color: var(--text-light);
    margin-bottom: 1rem;
    flex: 1;
}

.project-technologies {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tech-tag {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.project-github,
.project-live {
    margin-top: auto;
}

.project-links {
    display: flex;
    gap: 1rem;
    margin-top: auto;
    flex-wrap: wrap;
}

.github-link,
.live-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
}

.github-link:hover,
.live-link:hover {
    color: var(--primary-dark);
}

.github-icon,
.live-icon {
    width: 20px;
    height: 20px;
}

.project-date {
    margin-bottom: 0.5rem;
}

/* Loading */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    color: var(--text-light);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

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

/* No projects */
.no-projects {
    text-align: center;
    padding: 3rem;
    color: var(--text-light);
    font-size: 1.125rem;
}

.hidden {
    display: none !important;
}

/* Footer */
footer {
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: auto;
    text-align: center;
    color: var(--text-light);
}

/* Admin Styles */
.admin-section {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow);
}

.admin-section h2 {
    margin-bottom: 2rem;
    color: var(--text-color);
}

.form-container {
    margin-bottom: 3rem;
    padding-bottom: 3rem;
    border-bottom: 2px solid var(--border-color);
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group small {
    display: block;
    margin-top: 0.25rem;
    color: var(--text-light);
    font-size: 0.875rem;
}

.image-preview {
    margin-top: 1rem;
    max-width: 300px;
}

.image-preview img {
    width: 100%;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
}

.form-actions {
    display: flex;
    gap: 1rem;
}

button {
    padding: 0.75rem 2rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

button[type="submit"] {
    background: var(--primary-color);
    color: white;
}

button[type="submit"]:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

#cancel-btn {
    background: var(--text-light);
    color: white;
}

#cancel-btn:hover {
    background: #4b5563;
}

/* Admin Projects List */
.projects-list h3 {
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.admin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.admin-card {
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1.5rem;
    position: relative;
}

.admin-card.editing {
    border-color: var(--primary-color);
    background: #f0f0ff;
}

.admin-card h4 {
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.admin-card p {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
}

.admin-card-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.btn-edit,
.btn-delete {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

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

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

.btn-delete {
    background: #ef4444;
    color: white;
}

.btn-delete:hover {
    background: #dc2626;
}

/* Responsive */
@media (max-width: 768px) {
    .projects-grid,
    .admin-grid {
        grid-template-columns: 1fr;
    }
    
    header .container {
        flex-direction: column;
        text-align: center;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    button {
        width: 100%;
    }
}