/* ============================================================
   BlogSphere - Global Stylesheet
   ============================================================
   File:     assets/css/global.css
   Purpose:  Base styles, variables, reset, utilities, components
   Loaded:   On every page (frontend)

   Table of Contents:
     1. CSS Variables (Design Tokens)
     2. CSS Reset / Normalize
     3. Base Typography
     4. Layout Containers
     5. Buttons
     6. Forms & Inputs
     7. Cards
     8. Alerts & Toasts
     9. Back to Top Button
    10. Utility Classes
    11. Loading Spinner
    12. Animations
   ============================================================ */

/* ============================================================
   1. CSS VARIABLES (Design Tokens)
   ============================================================
   These variables define the design system.
   Change values here to update theme across entire site.
   ============================================================ */
:root {
  /* === BRAND COLORS === */
  --color-primary: #6c5ce7;
  --color-primary-dark: #5e4fcc;
  --color-primary-light: #8b7fe8;
  --color-secondary: #0984e3;
  --color-accent: #a29bfe;

  /* === GRADIENT COLORS === */
  --gradient-primary: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 100%);
  --gradient-secondary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-purple: linear-gradient(135deg, #c471f5 0%, #fa71cd 100%);
  --gradient-blue: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);

  /* === SEMANTIC COLORS === */
  --color-success: #00b894;
  --color-success-light: #e8f8f4;
  --color-error: #e74c3c;
  --color-error-light: #fdedec;
  --color-warning: #f39c12;
  --color-warning-light: #fef5e7;
  --color-info: #3498db;
  --color-info-light: #ebf5fb;

  /* === NEUTRAL COLORS (Light Mode) === */
  --color-bg: #ffffff;
  --color-bg-secondary: #f8f9fc;
  --color-bg-tertiary: #f1f3f8;
  --color-surface: #ffffff;
  --color-surface-hover: #f8f9fc;

  /* === TEXT COLORS === */
  --color-text: #2d3748;
  --color-text-secondary: #4a5568;
  --color-text-muted: #718096;
  --color-text-light: #a0aec0;
  --color-text-inverse: #ffffff;

  /* === BORDER COLORS === */
  --color-border: #e2e8f0;
  --color-border-light: #edf2f7;
  --color-border-dark: #cbd5e0;

  /* === SHADOWS === */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.05), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.08), 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.15);
  --shadow-card: 0 2px 8px rgba(108, 92, 231, 0.08);
  --shadow-hover: 0 8px 24px rgba(108, 92, 231, 0.15);

  /* === BORDER RADIUS === */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* === SPACING === */
  --space-xs: 0.25rem; /* 4px */
  --space-sm: 0.5rem; /* 8px */
  --space-md: 1rem; /* 16px */
  --space-lg: 1.5rem; /* 24px */
  --space-xl: 2rem; /* 32px */
  --space-2xl: 3rem; /* 48px */
  --space-3xl: 4rem; /* 64px */
  --space-4xl: 6rem; /* 96px */

  /* === TYPOGRAPHY === */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Consolas', 'Monaco', 'Courier New', monospace;

  /* === FONT SIZES === */
  --text-xs: 0.75rem; /* 12px */
  --text-sm: 0.875rem; /* 14px */
  --text-base: 1rem; /* 16px */
  --text-lg: 1.125rem; /* 18px */
  --text-xl: 1.25rem; /* 20px */
  --text-2xl: 1.5rem; /* 24px */
  --text-3xl: 1.875rem; /* 30px */
  --text-4xl: 2.25rem; /* 36px */
  --text-5xl: 3rem; /* 48px */
  --text-6xl: 3.75rem; /* 60px */

  /* === FONT WEIGHTS === */
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --weight-extrabold: 800;

  /* === LINE HEIGHTS === */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;

  /* === TRANSITIONS === */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

  /* === Z-INDEX === */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-bg: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  --z-toast: 800;

  /* === LAYOUT === */
  --container-max: 1280px;
  --container-wide: 1440px;
  --header-height: 76px;
}

/* ============================================================
   2. CSS RESET / NORMALIZE
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-normal);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  overflow-x: hidden;
  transition:
    background-color var(--transition-base),
    color var(--transition-base);
}

img,
video,
svg {
  max-width: 100%;
  height: auto;
  display: block;
}

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

a:hover {
  color: var(--color-primary-dark);
}

ul,
ol {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
  color: inherit;
}

input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

::selection {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

/* ============================================================
   3. BASE TYPOGRAPHY
   ============================================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  color: var(--color-text);
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--text-5xl);
}
h2 {
  font-size: var(--text-4xl);
}
h3 {
  font-size: var(--text-3xl);
}
h4 {
  font-size: var(--text-2xl);
}
h5 {
  font-size: var(--text-xl);
}
h6 {
  font-size: var(--text-lg);
}

p {
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
}

small {
  font-size: var(--text-sm);
}

strong,
b {
  font-weight: var(--weight-semibold);
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--color-bg-tertiary);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  color: var(--color-primary);
}

pre {
  font-family: var(--font-mono);
  background-color: #1a202c;
  color: #e2e8f0;
  padding: var(--space-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
  line-height: var(--leading-relaxed);
}

pre code {
  background: transparent;
  color: inherit;
  padding: 0;
}

blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--space-md);
  margin: var(--space-md) 0;
  color: var(--color-text-secondary);
  font-style: italic;
}

/* ============================================================
   4. LAYOUT CONTAINERS
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-wide {
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--space-md);
}

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

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

.section-lg {
  padding: var(--space-4xl) 0;
}

/* Page wrapper for sticky footer */
.page-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page-content {
  flex: 1;
}

/* ============================================================
   5. BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.5rem;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  user-select: none;
}

.btn:disabled,
.btn.disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

/* Button Variants */
.btn-primary {
  background-color: var(--color-text);
  color: var(--color-text-inverse);
}

.btn-primary:hover {
  background-color: #1a202c;
  color: var(--color-text-inverse);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-gradient {
  background: var(--gradient-primary);
  color: var(--color-text-inverse);
}

.btn-gradient:hover {
  color: var(--color-text-inverse);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text);
  border-color: var(--color-border-dark);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

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

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

.btn-success {
  background-color: var(--color-success);
  color: var(--color-text-inverse);
}

.btn-success:hover {
  background-color: #00a085;
  color: var(--color-text-inverse);
}

.btn-danger {
  background-color: var(--color-error);
  color: var(--color-text-inverse);
}

.btn-danger:hover {
  background-color: #c0392b;
  color: var(--color-text-inverse);
}

/* Button Sizes */
.btn-sm {
  padding: 0.5rem 1rem;
  font-size: var(--text-xs);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: var(--text-base);
}

.btn-block {
  display: flex;
  width: 100%;
}

.btn-icon {
  padding: 0.5rem;
  width: 40px;
  height: 40px;
}

/* ============================================================
   6. FORMS & INPUTS
   ============================================================ */
.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  margin-bottom: var(--space-xs);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text);
}

.form-control,
.form-input {
  display: block;
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: var(--text-sm);
  font-weight: var(--weight-normal);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.form-control:focus,
.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.1);
}

.form-control::placeholder,
.form-input::placeholder {
  color: var(--color-text-light);
}

textarea.form-control,
textarea.form-input {
  min-height: 120px;
  resize: vertical;
}

select.form-control,
select.form-input {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23718096' d='M6 8.825L1.175 4 2.238 2.938 6 6.7l3.763-3.762L10.825 4z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.form-error {
  display: block;
  margin-top: var(--space-xs);
  font-size: var(--text-xs);
  color: var(--color-error);
}

.form-help {
  display: block;
  margin-top: var(--space-xs);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.form-control.is-invalid,
.form-input.is-invalid {
  border-color: var(--color-error);
}

.form-control.is-invalid:focus,
.form-input.is-invalid:focus {
  box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

/* Checkbox & Radio */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
}

.form-check input[type='checkbox'],
.form-check input[type='radio'] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--color-primary);
}

/* ============================================================
   7. CARDS
   ============================================================ */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition:
    transform var(--transition-base),
    box-shadow var(--transition-base),
    border-color var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-border);
}

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background-color: var(--color-bg-tertiary);
}

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

.card-title {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.card-text {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.card-footer {
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--color-border-light);
  background-color: var(--color-bg-secondary);
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  line-height: 1.5;
}

.badge-secondary {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text);
}

.badge-success {
  background-color: var(--color-success-light);
  color: var(--color-success);
}

.badge-warning {
  background-color: var(--color-warning-light);
  color: var(--color-warning);
}

.badge-danger {
  background-color: var(--color-error-light);
  color: var(--color-error);
}

/* ============================================================
   8. ALERTS & TOAST NOTIFICATIONS
   ============================================================ */
.alert {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-md);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  border: 1px solid transparent;
}

.alert-success {
  background-color: var(--color-success-light);
  color: var(--color-success);
  border-color: rgba(0, 184, 148, 0.2);
}

.alert-danger,
.alert-error {
  background-color: var(--color-error-light);
  color: var(--color-error);
  border-color: rgba(231, 76, 60, 0.2);
}

.alert-warning {
  background-color: var(--color-warning-light);
  color: var(--color-warning);
  border-color: rgba(243, 156, 18, 0.2);
}

.alert-info {
  background-color: var(--color-info-light);
  color: var(--color-info);
  border-color: rgba(52, 152, 219, 0.2);
}

.alert-close {
  background: none;
  border: none;
  font-size: var(--text-xl);
  cursor: pointer;
  padding: 0 var(--space-sm);
  color: inherit;
  opacity: 0.6;
  line-height: 1;
}

.alert-close:hover {
  opacity: 1;
}

/* Toast Container */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  pointer-events: none;
  max-width: 400px;
}

.toast {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  pointer-events: auto;
  animation: slideInRight 0.3s ease-out;
  min-width: 280px;
}

.toast.toast-success {
  border-left: 4px solid var(--color-success);
}

.toast.toast-error {
  border-left: 4px solid var(--color-error);
}

.toast.toast-warning {
  border-left: 4px solid var(--color-warning);
}

.toast.toast-info {
  border-left: 4px solid var(--color-info);
}

.toast.toast-hide {
  animation: slideOutRight 0.3s ease-out forwards;
}

/* ============================================================
   9. BACK TO TOP BUTTON
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  background: var(--gradient-primary);
  color: var(--color-text-inverse);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-base);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: var(--z-fixed);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
}

/* ============================================================
   10. UTILITY CLASSES
   ============================================================ */

/* Display */
.d-none {
  display: none !important;
}
.d-block {
  display: block !important;
}
.d-inline {
  display: inline !important;
}
.d-inline-block {
  display: inline-block !important;
}
.d-flex {
  display: flex !important;
}
.d-inline-flex {
  display: inline-flex !important;
}
.d-grid {
  display: grid !important;
}

/* Flex */
.flex-row {
  flex-direction: row;
}
.flex-col {
  flex-direction: column;
}
.flex-wrap {
  flex-wrap: wrap;
}
.flex-nowrap {
  flex-wrap: nowrap;
}
.justify-start {
  justify-content: flex-start;
}
.justify-center {
  justify-content: center;
}
.justify-end {
  justify-content: flex-end;
}
.justify-between {
  justify-content: space-between;
}
.justify-around {
  justify-content: space-around;
}
.items-start {
  align-items: flex-start;
}
.items-center {
  align-items: center;
}
.items-end {
  align-items: flex-end;
}
.items-stretch {
  align-items: stretch;
}
.flex-1 {
  flex: 1;
}
.flex-auto {
  flex: auto;
}

/* Gap */
.gap-xs {
  gap: var(--space-xs);
}
.gap-sm {
  gap: var(--space-sm);
}
.gap-md {
  gap: var(--space-md);
}
.gap-lg {
  gap: var(--space-lg);
}
.gap-xl {
  gap: var(--space-xl);
}

/* Text Alignment */
.text-left {
  text-align: left;
}
.text-center {
  text-align: center;
}
.text-right {
  text-align: right;
}
.text-justify {
  text-align: justify;
}

/* Text Colors */
.text-primary {
  color: var(--color-primary);
}
.text-secondary {
  color: var(--color-text-secondary);
}
.text-muted {
  color: var(--color-text-muted);
}
.text-light {
  color: var(--color-text-light);
}
.text-inverse {
  color: var(--color-text-inverse);
}
.text-success {
  color: var(--color-success);
}
.text-error {
  color: var(--color-error);
}
.text-warning {
  color: var(--color-warning);
}
.text-info {
  color: var(--color-info);
}

/* Text Sizes */
.text-xs {
  font-size: var(--text-xs);
}
.text-sm {
  font-size: var(--text-sm);
}
.text-base {
  font-size: var(--text-base);
}
.text-lg {
  font-size: var(--text-lg);
}
.text-xl {
  font-size: var(--text-xl);
}
.text-2xl {
  font-size: var(--text-2xl);
}
.text-3xl {
  font-size: var(--text-3xl);
}

/* Font Weights */
.font-normal {
  font-weight: var(--weight-normal);
}
.font-medium {
  font-weight: var(--weight-medium);
}
.font-semibold {
  font-weight: var(--weight-semibold);
}
.font-bold {
  font-weight: var(--weight-bold);
}
.font-extrabold {
  font-weight: var(--weight-extrabold);
}

/* Margins */
.m-0 {
  margin: 0;
}
.mt-0 {
  margin-top: 0;
}
.mb-0 {
  margin-bottom: 0;
}
.mt-xs {
  margin-top: var(--space-xs);
}
.mt-sm {
  margin-top: var(--space-sm);
}
.mt-md {
  margin-top: var(--space-md);
}
.mt-lg {
  margin-top: var(--space-lg);
}
.mt-xl {
  margin-top: var(--space-xl);
}
.mb-xs {
  margin-bottom: var(--space-xs);
}
.mb-sm {
  margin-bottom: var(--space-sm);
}
.mb-md {
  margin-bottom: var(--space-md);
}
.mb-lg {
  margin-bottom: var(--space-lg);
}
.mb-xl {
  margin-bottom: var(--space-xl);
}
.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

/* Paddings */
.p-0 {
  padding: 0;
}
.p-xs {
  padding: var(--space-xs);
}
.p-sm {
  padding: var(--space-sm);
}
.p-md {
  padding: var(--space-md);
}
.p-lg {
  padding: var(--space-lg);
}
.p-xl {
  padding: var(--space-xl);
}

/* Width & Height */
.w-full {
  width: 100%;
}
.h-full {
  height: 100%;
}
.min-h-screen {
  min-height: 100vh;
}

/* Border Radius */
.rounded-sm {
  border-radius: var(--radius-sm);
}
.rounded-md {
  border-radius: var(--radius-md);
}
.rounded-lg {
  border-radius: var(--radius-lg);
}
.rounded-xl {
  border-radius: var(--radius-xl);
}
.rounded-full {
  border-radius: var(--radius-full);
}

/* Shadows */
.shadow-sm {
  box-shadow: var(--shadow-sm);
}
.shadow-md {
  box-shadow: var(--shadow-md);
}
.shadow-lg {
  box-shadow: var(--shadow-lg);
}
.shadow-none {
  box-shadow: none;
}

/* Position */
.relative {
  position: relative;
}
.absolute {
  position: absolute;
}
.fixed {
  position: fixed;
}
.sticky {
  position: sticky;
}

/* Overflow */
.overflow-hidden {
  overflow: hidden;
}
.overflow-auto {
  overflow: auto;
}
.overflow-scroll {
  overflow: scroll;
}

/* Cursor */
.cursor-pointer {
  cursor: pointer;
}
.cursor-not-allowed {
  cursor: not-allowed;
}

/* Text overflow */
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Visually hidden (for screen readers only) */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   11. LOADING SPINNER
   ============================================================ */
.spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid rgba(108, 92, 231, 0.2);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner-sm {
  width: 16px;
  height: 16px;
  border-width: 2px;
}

.spinner-lg {
  width: 40px;
  height: 40px;
  border-width: 4px;
}

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
}

/* ============================================================
   12. ANIMATIONS
   ============================================================ */
@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

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

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideOutRight {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(100%);
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes bounce {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* Animation utility classes */
.animate-fade-in {
  animation: fadeIn 0.5s ease-out;
}
.animate-fade-in-up {
  animation: fadeInUp 0.5s ease-out;
}
.animate-fade-in-down {
  animation: fadeInDown 0.5s ease-out;
}
.animate-pulse {
  animation: pulse 2s infinite;
}
.animate-spin {
  animation: spin 1s linear infinite;
}

/* ============================================================
   ACCESSIBILITY: Reduced Motion
   Respects user's "Reduce Motion" preference
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================================
   PRINT STYLES
   ============================================================ */
@media print {
  .no-print,
  nav,
  footer,
  .back-to-top,
  .toast-container {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  a {
    color: black;
    text-decoration: underline;
  }
}