/*
 * Design System - Base Styles
 * Single source of truth for colors, spacing, typography, and components
 */

/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */

@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap");

:root {
  /* Colors - Primary */
  --color-primary: #228b22;
  --color-primary-hover: #1a6b1a;
  --color-primary-light: #2ca02c;

  /* Colors - Status */
  --color-success: #11b41f;
  --color-error: #c2281d;
  --color-error-hover: #a02218;
  --color-warning: #f0ad4e;
  --color-info: #5bc0de;

  /* Colors - Neutrals */
  --color-background: #f4f4f4;
  --color-surface: #ffffff;
  --color-surface-alt: #e4e4e4;
  --color-border: #ddd;
  --color-border-dark: #ccc;

  /* Colors - Text */
  --color-text: #2c3e50;
  --color-text-light: #666;
  --color-text-muted: #888;
  --color-text-inverse: #ffffff;

  /* Spacing Scale (4px base) */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Typography */
  --font-family: "Poppins", Arial, sans-serif;
  --font-size-xs: 0.75rem; /* 12px */
  --font-size-sm: 0.875rem; /* 14px */
  --font-size-base: 1rem; /* 16px */
  --font-size-lg: 1.125rem; /* 18px */
  --font-size-xl: 1.25rem; /* 20px */
  --font-size-2xl: 1.5rem; /* 24px */
  --font-size-3xl: 2rem; /* 32px */

  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.25);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;

  /* Z-Index Scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal-backdrop: 900;
  --z-modal: 1000;
  --z-toast: 1100;
}

/* ============================================
   Base Reset & Defaults
   ============================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 var(--space-md) 0;
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
}

h1 {
  font-size: var(--font-size-3xl);
}
h2 {
  font-size: var(--font-size-2xl);
}
h3 {
  font-size: var(--font-size-xl);
}
h4 {
  font-size: var(--font-size-lg);
}

p {
  margin: 0 0 var(--space-md) 0;
}

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

a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

ul,
ol {
  margin: 0;
  padding: 0;
}

/* ============================================
   Layout Utilities
   ============================================ */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-sm {
  max-width: 600px;
}

.container-lg {
  max-width: 1400px;
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-end {
  justify-content: flex-end;
}

.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);
}

.grid {
  display: grid;
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

/* ============================================
   Spacing Utilities
   ============================================ */

.m-0 {
  margin: 0;
}
.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-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);
}

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

/* ============================================
   Typography Utilities
   ============================================ */

.text-xs {
  font-size: var(--font-size-xs);
}
.text-sm {
  font-size: var(--font-size-sm);
}
.text-base {
  font-size: var(--font-size-base);
}
.text-lg {
  font-size: var(--font-size-lg);
}
.text-xl {
  font-size: var(--font-size-xl);
}
.text-2xl {
  font-size: var(--font-size-2xl);
}

.font-light {
  font-weight: var(--font-weight-light);
}
.font-normal {
  font-weight: var(--font-weight-normal);
}
.font-medium {
  font-weight: var(--font-weight-medium);
}
.font-semibold {
  font-weight: var(--font-weight-semibold);
}
.font-bold {
  font-weight: var(--font-weight-bold);
}

.text-center {
  text-align: center;
}
.text-left {
  text-align: left;
}
.text-right {
  text-align: right;
}

.text-muted {
  color: var(--color-text-muted);
}
.text-light {
  color: var(--color-text-light);
}
.text-success {
  color: var(--color-success);
}
.text-error {
  color: var(--color-error);
}

/* ============================================
   Button Components
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-normal);
  text-align: center;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:hover {
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

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

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

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

.btn-danger:hover:not(:disabled) {
  background-color: var(--color-error-hover);
  border-color: var(--color-error-hover);
}

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

.btn-ghost:hover:not(:disabled) {
  background-color: var(--color-surface-alt);
}

.btn-sm {
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--font-size-sm);
}

.btn-lg {
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-size-lg);
}

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

/* ============================================
   Form Components
   ============================================ */

.form-group {
  margin-bottom: var(--space-md);
}

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

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(34, 139, 34, 0.15);
}

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

.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right var(--space-sm) center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: var(--space-xl);
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

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

/* ============================================
   Card Component
   ============================================ */

.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.card-header {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

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

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

/* ============================================
   Alert Component
   ============================================ */

.alert {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
}

.alert-success {
  background-color: rgba(17, 180, 31, 0.1);
  border: 1px solid var(--color-success);
  color: var(--color-success);
}

.alert-error {
  background-color: rgba(194, 40, 29, 0.1);
  border: 1px solid var(--color-error);
  color: var(--color-error);
}

.alert-warning {
  background-color: rgba(240, 173, 78, 0.1);
  border: 1px solid var(--color-warning);
  color: #8a6d3b;
}

.alert-info {
  background-color: rgba(91, 192, 222, 0.1);
  border: 1px solid var(--color-info);
  color: #31708f;
}

/* ============================================
   Modal Component
   ============================================ */

.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal),
    visibility var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 400px;
  max-height: 90vh;
  overflow-y: auto;
  z-index: var(--z-modal);
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.modal-title {
  margin: 0;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

.modal-close {
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  cursor: pointer;
  color: var(--color-text-muted);
  padding: var(--space-xs);
  line-height: 1;
  transition: color var(--transition-fast);
}

.modal-close:hover {
  color: var(--color-text);
}

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

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-background);
}

/* ============================================
   Progress Bar Component
   ============================================ */

.progress {
  height: 20px;
  background-color: var(--color-surface-alt);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-inverse);
}

.progress-bar.progress-low {
  background-color: var(--color-error);
}

.progress-bar.progress-mid {
  background-color: var(--color-warning);
}

.progress-bar.progress-high {
  background-color: var(--color-primary);
}

.progress-bar.progress-complete {
  background-color: var(--color-success);
}

/* ============================================
   Badge Component
   ============================================ */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-success {
  background-color: rgba(17, 180, 31, 0.15);
  color: var(--color-success);
}

.badge-error {
  background-color: rgba(194, 40, 29, 0.15);
  color: var(--color-error);
}

.badge-warning {
  background-color: rgba(240, 173, 78, 0.15);
  color: #8a6d3b;
}

.badge-info {
  background-color: rgba(91, 192, 222, 0.15);
  color: #31708f;
}

.badge-neutral {
  background-color: var(--color-surface-alt);
  color: var(--color-text-light);
}

/* ============================================
   List Component
   ============================================ */

.list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.list-item {
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.list-item:last-child {
  border-bottom: none;
}

/* ============================================
   Toast/Notification Component
   ============================================ */

.toast-container {
  position: fixed;
  top: var(--space-lg);
  right: var(--space-lg);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.toast {
  padding: var(--space-md) var(--space-lg);
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  animation: slideIn var(--transition-normal) ease-out;
}

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

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

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

/* ============================================
   Utility Classes
   ============================================ */

.hidden {
  display: none !important;
}

.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;
}

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

.w-full {
  width: 100%;
}

/* ============================================
   Responsive Breakpoints
   ============================================ */

/* Tablet and below */
@media screen and (max-width: 768px) {
  :root {
    --font-size-3xl: 1.75rem;
    --font-size-2xl: 1.25rem;
  }

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

  .grid-cols-2,
  .grid-cols-3 {
    grid-template-columns: 1fr;
  }

  .modal {
    max-width: calc(100% - var(--space-lg));
    margin: var(--space-md);
  }

  .btn-lg {
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-base);
  }

  .hide-mobile {
    display: none !important;
  }
}

/* Mobile */
@media screen and (max-width: 480px) {
  .container {
    padding: 0 var(--space-xs);
  }

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

  .modal-body {
    padding: var(--space-md);
  }

  .flex-col-mobile {
    flex-direction: column;
  }

  .btn-block-mobile {
    width: 100%;
  }
}