:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary: #ec4899;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --dark: #1e293b;
  --gray: #64748b;
  --light-gray: #f1f5f9;
  --white: #ffffff;
  --border: #e2e8f0;
  --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);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  background-attachment: fixed;
  color: var(--dark);
  line-height: 1.6;
  min-height: 100vh;
}

/* Glass effect background overlay */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px;
  position: relative;
  z-index: 1;
}

/* ===== HEADER ===== */
.header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
}

.logo {
  font-size: 28px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

.header nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.header nav a {
  color: var(--dark);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  padding: 8px 16px;
  border-radius: 8px;
  transition: var(--transition);
  position: relative;
}

.header nav a:hover {
  background: var(--light-gray);
  color: var(--primary);
  transform: translateY(-1px);
}

.header nav a:active {
  transform: translateY(0);
}

.header nav span {
  color: var(--gray);
  font-size: 14px;
  padding: 8px 12px;
  background: var(--light-gray);
  border-radius: 8px;
  font-weight: 500;
}

/* ===== POSTS ===== */
.post {
  background: rgba(255, 255, 255, 0.98);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 30px;
  box-shadow: var(--shadow-xl);
  transition: var(--transition);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.post:hover {
  transform: translateY(-5px);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.post-image {
  width: 100%;
  height: 320px;
  object-fit: cover;
  display: block;
  transition: var(--transition);
}

.post:hover .post-image {
  transform: scale(1.05);
}

.post h2 {
  padding: 25px 25px 0;
  margin: 0;
  font-size: 26px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--dark);
}

.post h2 a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

.post h2 a:hover {
  color: var(--primary);
}

.post p {
  padding: 15px 25px 25px;
  margin: 0;
  color: var(--gray);
  font-size: 16px;
  line-height: 1.7;
}

.post-actions {
  padding: 0 25px 25px;
  display: flex;
  gap: 10px;
}

/* ===== BUTTONS ===== */
button, .btn {
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: var(--shadow);
  font-family: inherit;
}

button:hover, .btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

button:active, .btn:active {
  transform: translateY(0);
}

button[type="submit"], .btn.primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
  width: 100%;
}

button[type="submit"]:hover {
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.4);
}

.btn.edit {
  background: linear-gradient(135deg, var(--warning) 0%, #f97316 100%);
  color: var(--white);
}

.btn.delete {
  background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
  color: var(--white);
}

/* ===== FORMS ===== */
input, textarea {
  width: 100%;
  padding: 14px 18px;
  margin-bottom: 20px;
  font-size: 16px;
  border: 2px solid var(--border);
  border-radius: 10px;
  transition: var(--transition);
  font-family: inherit;
  background: var(--white);
  color: var(--dark);
}

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

textarea {
  min-height: 150px;
  resize: vertical;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--dark);
  font-size: 14px;
}

/* ===== MODAL ===== */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(5px);
  justify-content: center;
  align-items: center;
  z-index: 1000;
  animation: fadeIn 0.3s ease;
}

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

.modal-content {
  background: var(--white);
  padding: 35px;
  border-radius: 20px;
  width: 90%;
  max-width: 450px;
  box-shadow: var(--shadow-xl);
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    transform: translateY(50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.modal-content h3 {
  margin-bottom: 15px;
  font-size: 24px;
  color: var(--dark);
}

.modal-content p {
  color: var(--gray);
  margin-bottom: 25px;
  font-size: 16px;
}

.modal-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

.modal-actions button {
  width: auto;
  padding: 10px 20px;
}

/* ===== ALERTS ===== */
.error, .info {
  padding: 16px 20px;
  border-radius: 10px;
  margin-bottom: 20px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from {
    transform: translateY(-10px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.error {
  background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
  color: #991b1b;
  border: 1px solid #fca5a5;
}

.info {
  background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
  color: #1e40af;
  border: 1px solid #93c5fd;
}

/* ===== PASSWORD WRAPPER ===== */
.password-wrapper {
  position: relative;
  margin-bottom: 20px;
}

.password-wrapper input {
  padding-right: 50px;
  margin-bottom: 0;
}

.toggle-password {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  cursor: pointer;
  font-size: 20px;
  user-select: none;
  color: var(--gray);
  transition: var(--transition);
}

.toggle-password:hover {
  color: var(--primary);
}

#strength {
  margin-bottom: 15px;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  display: inline-block;
  transition: var(--transition);
}

/* ===== FOOTER ===== */
.footer {
  text-align: center;
  padding: 40px 20px;
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
  margin-top: 40px;
}

.footer p {
  margin: 0;
  font-weight: 500;
}

/* ===== FORM CONTAINERS ===== */
.form-container {
  max-width: 500px;
  margin: 40px auto;
  background: rgba(255, 255, 255, 0.98);
  padding: 40px;
  border-radius: 20px;
  box-shadow: var(--shadow-xl);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.form-container h2 {
  margin-bottom: 10px;
  font-size: 32px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.form-container p {
  color: var(--gray);
  margin-bottom: 30px;
  font-size: 15px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .header .container {
    flex-direction: column;
    gap: 15px;
    text-align: center;
  }

  .header nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .post h2 {
    font-size: 22px;
    padding: 20px 20px 0;
  }

  .post p {
    padding: 12px 20px 20px;
    font-size: 15px;
  }

  .post-actions {
    padding: 0 20px 20px;
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .form-container {
    padding: 30px 20px;
  }

  .modal-actions {
    flex-direction: column-reverse;
  }

  .modal-actions button {
    width: 100%;
  }
}

/* ===== LOADING ANIMATION ===== */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.loading {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* ===== UTILITY CLASSES ===== */
.text-center {
  text-align: center;
}

.mt-20 {
  margin-top: 20px;
}

.mb-20 {
  margin-bottom: 20px;
}

/* ===== SMOOTH SCROLLING ===== */
html {
  scroll-behavior: smooth;
}

/* ===== SELECTION ===== */
::selection {
  background: var(--primary-light);
  color: var(--white);
}

/* ===== FOCUS VISIBLE ===== */
*:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}