/* ========================================
   100 Days of Making AI
   Clean, minimal style inspired by nejohnson2.com
   ======================================== */

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --color-bg: #ffffff;
    --color-text: #222222;
    --color-text-light: #666666;
    --color-border: #e0e0e0;
    --color-accent: #333333;
    --color-danger: #c0392b;
    --color-success: #27ae60;
    --max-width: 1200px;
    --spacing: 24px;
}

html {
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--color-text);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
}

/* --- Header & Nav --- */
header {
    border-bottom: 1px solid var(--color-border);
}

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

.site-title {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.site-title:hover {
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: var(--spacing);
}

.nav-links a {
    font-size: 0.95rem;
    color: var(--color-text-light);
}

.nav-links a:hover {
    color: var(--color-text);
    text-decoration: none;
}

/* --- Main --- */
main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing);
    flex: 1;
    width: 100%;
}

/* --- Footer --- */
footer {
    border-top: 1px solid var(--color-border);
    text-align: center;
    padding: var(--spacing);
    color: var(--color-text-light);
    font-size: 0.85rem;
}

/* --- Flash Messages --- */
.flash {
    padding: 12px 16px;
    margin-bottom: var(--spacing);
    border-radius: 4px;
    font-size: 0.9rem;
}

.flash-error {
    background: #fdecea;
    color: var(--color-danger);
}

.flash-success {
    background: #eafaf1;
    color: var(--color-success);
}

/* ========================================
   Project Grid (Home Page)
   ======================================== */
.project-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.project-card {
    display: block;
    text-decoration: none;
}

.project-card:hover {
    text-decoration: none;
}

.project-image {
    position: relative;
    width: 100%;
    padding-bottom: 100%; /* Square aspect ratio */
    background-size: cover;
    background-position: center;
    background-color: #f0f0f0;
    overflow: hidden;
}

.project-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    top: 0;
    background: rgba(0, 0, 0, 0);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 16px;
    transition: background 0.3s ease;
}

.project-overlay .project-day,
.project-overlay h3 {
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    color: #ffffff;
}

.project-card:hover .project-overlay {
    background: rgba(0, 0, 0, 0.55);
}

.project-card:hover .project-overlay .project-day,
.project-card:hover .project-overlay h3 {
    opacity: 1;
    transform: translateY(0);
}

.project-overlay .project-day {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 4px;
}

.project-overlay h3 {
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.3;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px var(--spacing);
    color: var(--color-text-light);
    font-size: 1.1rem;
}

/* ========================================
   Project Detail Page
   ======================================== */
.project-page {
    max-width: 720px;
    margin: 0 auto;
}

.project-header {
    margin-bottom: 32px;
}

.project-day-label {
    display: inline-block;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-light);
    margin-bottom: 8px;
}

.project-header h1 {
    font-size: 2rem;
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 8px;
}

.project-header time {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.project-hero {
    margin-bottom: 32px;
}

.project-hero img {
    width: 100%;
    display: block;
}

.project-content {
    font-size: 1.05rem;
    line-height: 1.7;
}

.project-content h2 {
    margin-top: 32px;
    margin-bottom: 12px;
    font-size: 1.4rem;
}

.project-content h3 {
    margin-top: 24px;
    margin-bottom: 8px;
    font-size: 1.15rem;
}

.project-content p {
    margin-bottom: 16px;
}

.project-content img {
    margin: 24px 0;
}

.project-content pre {
    background: #f5f5f5;
    padding: 16px;
    border-radius: 4px;
    overflow-x: auto;
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.project-content code {
    background: #f5f5f5;
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 0.9em;
}

.project-content pre code {
    background: none;
    padding: 0;
}

.project-content ul, .project-content ol {
    margin-bottom: 16px;
    padding-left: 24px;
}

.project-content li {
    margin-bottom: 4px;
}

.project-content blockquote {
    border-left: 3px solid var(--color-border);
    margin: 24px 0;
    padding: 12px 20px;
    color: var(--color-text-light);
    font-style: italic;
}

.project-content blockquote p:last-child {
    margin-bottom: 0;
}

.project-content hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 32px 0;
}

.project-content a {
    text-decoration: underline;
    text-underline-offset: 3px;
}

.project-content a:hover {
    color: var(--color-text-light);
}

.project-content iframe,
.project-content video {
    max-width: 100%;
    margin: 24px 0;
    display: block;
}

.project-content .mce-preview-object {
    max-width: 100%;
}

.project-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
}

.project-content th,
.project-content td {
    border: 1px solid var(--color-border);
    padding: 8px 12px;
    text-align: left;
}

.project-content th {
    background: #f5f5f5;
    font-weight: 600;
}

.project-content s,
.project-content del {
    text-decoration: line-through;
}

.back-link {
    display: inline-block;
    margin-top: 48px;
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.back-link:hover {
    color: var(--color-text);
}

/* ========================================
   About Page
   ======================================== */
.about-page {
    max-width: 600px;
    margin: 0 auto;
}

.about-page h1 {
    font-size: 2rem;
    margin-bottom: 24px;
}

.about-page p {
    margin-bottom: 16px;
    font-size: 1.05rem;
    line-height: 1.7;
}

.about-page a {
    text-decoration: underline;
    text-underline-offset: 3px;
}

.about-page a:hover {
    color: var(--color-text-light);
}

/* ========================================
   Login Page
   ======================================== */
.login-page {
    max-width: 320px;
    margin: 80px auto;
    text-align: center;
}

.login-page h1 {
    font-size: 1.5rem;
    margin-bottom: 24px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.login-form input {
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 1rem;
    font-family: var(--font-sans);
}

.login-form button {
    padding: 10px 12px;
    background: var(--color-accent);
    color: #ffffff;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    font-family: var(--font-sans);
}

.login-form button:hover {
    background: #444444;
}

/* ========================================
   Admin
   ======================================== */
.admin-dashboard {
    max-width: 900px;
    margin: 0 auto;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.admin-header h1 {
    font-size: 1.5rem;
}

.admin-actions {
    display: flex;
    gap: 8px;
}

.btn {
    display: inline-block;
    padding: 8px 16px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 0.9rem;
    cursor: pointer;
    font-family: var(--font-sans);
    text-decoration: none;
    background: #ffffff;
    color: var(--color-text);
}

.btn:hover {
    text-decoration: none;
    background: #f5f5f5;
}

.btn-primary {
    background: var(--color-accent);
    color: #ffffff;
    border-color: var(--color-accent);
}

.btn-primary:hover {
    background: #444444;
}

.btn-secondary {
    background: transparent;
}

.btn-danger {
    color: var(--color-danger);
    border-color: var(--color-danger);
}

.btn-danger:hover {
    background: var(--color-danger);
    color: #ffffff;
}

.btn-small {
    padding: 4px 10px;
    font-size: 0.8rem;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table th,
.admin-table td {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 1px solid var(--color-border);
}

.admin-table th {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-light);
}

.admin-actions-cell {
    display: flex;
    gap: 6px;
}

/* --- Admin Edit Form --- */
.admin-edit {
    max-width: 800px;
    margin: 0 auto;
}

.admin-edit h1 {
    font-size: 1.5rem;
    margin-bottom: 24px;
}

.edit-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-text-light);
}

.form-group input[type="text"],
.form-group input[type="number"] {
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 1rem;
    font-family: var(--font-sans);
}

.form-group input[type="file"] {
    font-size: 0.9rem;
}

.current-image {
    margin-bottom: 8px;
}

.form-actions {
    display: flex;
    gap: 8px;
    padding-top: 8px;
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 900px) {
    .project-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 640px) {
    .project-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    nav {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .admin-header {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }
}

@media (max-width: 400px) {
    .project-grid {
        grid-template-columns: 1fr;
    }
}