/* ========================================
   BLOG - React CDN Version
   Minimalist Design System
   ======================================== */

/* CSS Variables - Themes */
:root {
  --bg: #fafafa;
  --bg-card: #ffffff;
  --text: #171717;
  --text-muted: #737373;
  --primary: #171717;
  --primary-fg: #fafafa;
  --border: #e5e5e5;
  --accent: #f5f5f5;
  --gradient-start: rgba(23, 23, 23, 0.05);
  --gradient-end: rgba(23, 23, 23, 0.02);

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
}

.dark {
  --bg: #0a0a0a;
  --bg-card: #171717;
  --text: #fafafa;
  --text-muted: #a3a3a3;
  --primary: #fafafa;
  --primary-fg: #0a0a0a;
  --border: #262626;
  --accent: #262626;
  --gradient-start: rgba(250, 250, 250, 0.05);
  --gradient-end: rgba(250, 250, 250, 0.02);
}

.rose {
  --bg: #fdf2f4;
  --bg-card: #ffffff;
  --text: #4a1d2a;
  --text-muted: #9f5068;
  --primary: #e11d48;
  --primary-fg: #ffffff;
  --border: #fecdd3;
  --accent: #ffe4e6;
  --gradient-start: rgba(225, 29, 72, 0.08);
  --gradient-end: rgba(225, 29, 72, 0.03);
}

.ocean {
  --bg: #0c1929;
  --bg-card: #132337;
  --text: #e0f2fe;
  --text-muted: #7dd3fc;
  --primary: #38bdf8;
  --primary-fg: #0c1929;
  --border: #1e3a5f;
  --accent: #1e3a5f;
  --gradient-start: rgba(56, 189, 248, 0.1);
  --gradient-end: rgba(56, 189, 248, 0.03);
}

.forest {
  --bg: #f0fdf4;
  --bg-card: #ffffff;
  --text: #14532d;
  --text-muted: #4d7c5f;
  --primary: #16a34a;
  --primary-fg: #ffffff;
  --border: #bbf7d0;
  --accent: #dcfce7;
  --gradient-start: rgba(22, 163, 74, 0.08);
  --gradient-end: rgba(22, 163, 74, 0.03);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background-color var(--transition-base), color var(--transition-base);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Layout */
.container {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-3xl) 0;
}

.page {
  min-height: 100vh;
}

.page-header {
  margin-bottom: var(--space-2xl);
}

.page-header h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-sm);
}

.page-header p {
  font-size: 1.125rem;
  color: var(--text-muted);
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  background-color: color-mix(in srgb, var(--bg) 60%, transparent);
}

.nav-container {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
}

.logo-icon {
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary), color-mix(in srgb, var(--primary) 60%, transparent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-fg);
  font-weight: 700;
  font-size: 0.875rem;
}

.logo-text {
  font-weight: 600;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-link {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
  cursor: pointer;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text);
}

/* Theme Dropdown */
.theme-dropdown {
  position: relative;
}

.theme-btn {
  width: 2.25rem;
  height: 2.25rem;
  border: none;
  background: transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.theme-btn:hover {
  background-color: var(--accent);
  color: var(--text);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xs);
  min-width: 140px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.dropdown-item {
  display: block;
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: none;
  background: transparent;
  text-align: left;
  font-size: 0.875rem;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.dropdown-item:hover {
  background: var(--accent);
  color: var(--text);
}

.dropdown-item.active {
  background: var(--accent);
  color: var(--primary);
}

/* Hero */
.hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: 4rem;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--gradient-start), transparent, var(--gradient-end));
}

.floating-shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.6;
}

.shape-1 {
  top: 5rem;
  left: 10%;
  width: 18rem;
  height: 18rem;
  background: var(--gradient-start);
}

.shape-2 {
  bottom: 5rem;
  right: 10%;
  width: 24rem;
  height: 24rem;
  background: var(--gradient-end);
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  padding: 0 var(--space-lg);
  max-width: 56rem;
}

.hero-badge {
  display: inline-block;
  padding: var(--space-sm) var(--space-md);
  border-radius: 9999px;
  background: var(--gradient-start);
  color: var(--primary);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--space-lg);
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-lg);
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary), color-mix(in srgb, var(--primary) 60%, transparent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--text-muted);
  max-width: 40rem;
  margin: 0 auto var(--space-2xl);
}

.scroll-indicator {
  color: var(--text-muted);
}

/* Cards */
.section-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--primary);
  margin-bottom: var(--space-lg);
}

.section-label.muted {
  color: var(--text-muted);
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr));
  gap: var(--space-lg);
}

.card {
  position: relative;
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  cursor: pointer;
}

/* Card Wrapper for action buttons */
.card-wrapper {
  position: relative;
}

.card-actions {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  display: flex;
  gap: var(--space-xs);
  opacity: 0;
  transform: translateY(-4px);
  transition: all 0.2s ease;
  z-index: 10;
}

.card-wrapper:hover .card-actions {
  opacity: 1;
  transform: translateY(0);
}

/* Mobile: always show actions */
@media (max-width: 768px) {
  .card-actions {
    opacity: 1;
    transform: translateY(0);
  }
}

.card-action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  backdrop-filter: blur(8px);
}

.card-action-btn.edit {
  background: rgba(var(--primary-rgb, 99, 102, 241), 0.9);
  color: white;
}

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

.card-action-btn.delete {
  background: rgba(239, 68, 68, 0.9);
  color: white;
}

.card-action-btn.delete:hover {
  background: #ef4444;
}

.card-featured {
  grid-column: 1 / -1;
}

.card-content {
  padding: var(--space-xl);
}

.card-hover-gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--gradient-start), transparent, transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.card:hover .card-hover-gradient {
  opacity: 1;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.tag {
  padding: var(--space-xs) var(--space-sm);
  background: var(--accent);
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
  transition: color var(--transition-fast);
}

.card-title-lg {
  font-size: clamp(1.5rem, 4vw, 1.875rem);
}

.card:hover .card-title {
  color: var(--primary);
}

.card-excerpt {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.meta-info {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.meta-item svg {
  opacity: 0.7;
}

.arrow-icon {
  color: var(--primary);
}

/* Post Page */
.reading-progress {
  position: fixed;
  top: 4rem;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), color-mix(in srgb, var(--primary) 60%, transparent));
  z-index: 99;
  transform-origin: 0%;
}

.post {
  min-height: 100vh;
  padding: 6rem 0 4rem;
}

.post-container {
  max-width: 48rem;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--space-2xl);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.back-btn:hover {
  background-color: var(--accent);
  color: var(--text);
}

.post-header {
  margin-bottom: var(--space-2xl);
}

.post-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin: var(--space-lg) 0;
}

.post-excerpt {
  font-size: 1.25rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-xl);
}

.post-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.share-btn {
  width: 2.25rem;
  height: 2.25rem;
  border: none;
  background: transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.share-btn:hover {
  background-color: var(--accent);
  color: var(--text);
}

.post-content {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--text-muted);
}

.post-content h2 {
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: var(--space-3xl) 0 var(--space-lg);
}

.post-content h3 {
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--text);
  margin: var(--space-2xl) 0 var(--space-md);
}

.post-content p {
  margin-bottom: var(--space-lg);
}

.post-content li {
  margin-bottom: var(--space-sm);
  margin-left: var(--space-xl);
}

.post-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-3xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  background: none;
  transition: all var(--transition-fast);
}

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

.btn-outline:hover {
  background-color: var(--accent);
}

.btn-ghost {
  color: var(--text-muted);
}

.btn-ghost:hover {
  background-color: var(--accent);
  color: var(--text);
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: var(--space-2xl) 0;
  text-align: center;
}

.footer p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--text-muted) 30%, transparent);
  border-radius: 4px;
}

::selection {
  background: color-mix(in srgb, var(--primary) 20%, transparent);
}

/* Responsive */
@media (max-width: 768px) {
  .floating-shape {
    display: none;
  }

  .hero {
    min-height: 60vh;
  }

  .card-content {
    padding: var(--space-lg);
  }
}

/* ========================================
   PROFILE PAGE
   ======================================== */
.profile-page {
  min-height: 100vh;
  padding: 6rem var(--space-lg) var(--space-2xl);
}

.profile-container {
  max-width: 640px;
  margin: 0 auto;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: var(--space-xl);
  cursor: pointer;
  transition: color var(--transition-fast);
}

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

.profile-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  margin-bottom: var(--space-lg);
}

.profile-header-content {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.profile-avatar-large {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--primary-fg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  overflow: hidden;
}

.profile-avatar-large img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-name {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.profile-email {
  color: var(--text-muted);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--border);
}

.hint-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

.info-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
}

.info-row:not(:last-child) {
  border-bottom: 1px solid var(--border);
}

.info-label {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.info-value {
  font-size: 0.875rem;
  font-weight: 500;
}

/* ========================================
   WRITE PAGE
   ======================================== */
.write-page {
  min-height: 100vh;
  padding: 6rem var(--space-lg) var(--space-2xl);
}

.write-container {
  max-width: 800px;
  margin: 0 auto;
}

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

.header-actions {
  display: flex;
  gap: var(--space-md);
}

.btn-outline-sm {
  padding: var(--space-sm) var(--space-md);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-outline-sm:hover {
  background: var(--accent);
}

.btn-primary-sm {
  padding: var(--space-sm) var(--space-md);
  background: var(--primary);
  border: none;
  border-radius: var(--radius-md);
  color: var(--primary-fg);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: opacity var(--transition-fast);
}

.btn-primary-sm:hover {
  opacity: 0.9;
}

.btn-primary-sm:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.title-input {
  width: 100%;
  font-size: 2rem;
  font-weight: 700;
  border: none;
  border-bottom: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  padding: var(--space-md) 0;
  margin-bottom: var(--space-md);
  outline: none;
}

.title-input::placeholder {
  color: var(--text-muted);
}

.excerpt-input {
  width: 100%;
  font-size: 1.125rem;
  border: none;
  border-bottom: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  padding: var(--space-sm) 0;
  margin-bottom: var(--space-lg);
  outline: none;
}

.excerpt-input::placeholder {
  color: var(--text-muted);
}

.tags-section {
  margin-bottom: var(--space-lg);
}

.tags-section label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--space-sm);
}

.tags-container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.tag-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  background: var(--accent);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
}

.tag-badge button {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1;
}

.tag-badge button:hover {
  color: var(--text);
}

.tag-input-row {
  display: flex;
  gap: var(--space-sm);
}

.tag-input {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg);
  color: var(--text);
  font-size: 0.875rem;
}

.tag-input:disabled {
  opacity: 0.5;
}

.add-tag-btn {
  padding: var(--space-sm) var(--space-md);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--text);
  font-size: 1rem;
}

.add-tag-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.tag-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

.content-section label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--space-sm);
}

.content-textarea {
  width: 100%;
  min-height: 400px;
  padding: var(--space-md);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  line-height: 1.75;
  resize: vertical;
  font-family: inherit;
}

.content-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--space-sm);
}

/* Preview */
.preview-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
}

.preview-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  line-height: 1.2;
}

.preview-excerpt {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
}

.preview-meta {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--border);
}

.preview-content {
  font-size: 1.125rem;
  line-height: 1.8;
}

.preview-content p {
  margin-bottom: var(--space-md);
}