/* ========================================
   MAIN STYLESHEET
   Fabric Calculator Application
   ======================================== */

/* ========================================
   1. CSS VARIABLES - DESIGN SYSTEM
   ======================================== */

:root {
  /* ===== COLOR PALETTE ===== */

  /* Primary Colors - Purple/Blue gradient theme */
  --color-primary: #667eea;
  --color-primary-dark: #5568d3;
  --color-primary-light: #8498d1;
  --color-primary-lighter: #a2b4dd;
  --color-primary-alpha-10: rgba(102, 126, 234, 0.1);
  --color-primary-alpha-30: rgba(102, 126, 234, 0.3);
  --color-primary-alpha-40: rgba(102, 126, 234, 0.4);

  /* Secondary Colors */
  --color-secondary: #764ba2;
  --color-secondary-dark: #5e3c82;
  --color-secondary-light: #9b6fc9;

  /* Accent Colors */
  --color-accent: #617bb5;
  --color-accent-light: #8498d1;

  /* Neutral Colors */
  --color-white: #ffffff;
  --color-black: #000000;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f5f5f5;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Semantic Colors */
  --color-success: #2e7d32;
  --color-success-bg: #e8f5e9;
  --color-success-border: #81c784;

  --color-error: #c62828;
  --color-error-bg: #ffebee;
  --color-error-border: #ef9a9a;
  --color-error-text: #ff314e;

  --color-warning: #f57c00;
  --color-warning-bg: #fff3e0;
  --color-warning-border: #ffb74d;

  --color-info: #1976d2;
  --color-info-dark: #007bb5;
  --color-info-bg: #e3f2fd;
  --color-info-border: #90caf9;

  /* UI Colors */
  --color-text-primary: #333333;
  --color-text-secondary: #666666;
  --color-text-muted: #999999;
  --color-text-inverse: #ffffff;

  --color-background: #ffffff;
  --color-background-alt: #f5f5f5;
  --color-background-disabled: #cccccc;

  --color-border: #e0e0e0;
  --color-border-dark: #cccccc;
  --color-border-focus: var(--color-primary);

  /* SVG Colors */
  --color-svg-fill: #8498d1;
  --color-svg-stroke: #617bb5;
  --color-svg-bin: #ffffff;
  --color-svg-hover: #075911;
  --color-svg-active: #06380c;
  --color-svg-disabled: #9b9da2;
  --color-svg-rect-bg: #eeeeee;

  /* Gradient */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

  /* ===== SPACING SCALE ===== */
  --space-0: 0;
  --space-1: 0.25rem;    /* 4px */
  --space-2: 0.5rem;     /* 8px */
  --space-3: 0.75rem;    /* 12px */
  --space-4: 1rem;       /* 16px */
  --space-5: 1.25rem;    /* 20px */
  --space-6: 1.5rem;     /* 24px */
  --space-7: 1.75rem;    /* 28px */
  --space-8: 2rem;       /* 32px */
  --space-10: 2.5rem;    /* 40px */
  --space-12: 3rem;      /* 48px */
  --space-16: 4rem;      /* 64px */

  /* ===== TYPOGRAPHY ===== */

  /* Font Families */
  --font-primary: Arial, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Courier New', Courier, monospace;

  /* Font Sizes */
  --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: 1.75rem;   /* 28px */
  --font-size-4xl: 2rem;      /* 32px */
  --font-size-5xl: 3rem;      /* 48px */

  /* Font Weights */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.6;
  --line-height-loose: 2;

  /* ===== BORDER RADIUS ===== */
  --radius-none: 0;
  --radius-sm: 0.25rem;    /* 4px */
  --radius-md: 0.5rem;     /* 8px */
  --radius-lg: 0.75rem;    /* 12px */
  --radius-xl: 1rem;       /* 16px */
  --radius-2xl: 1.25rem;   /* 20px */
  --radius-full: 50%;
  --radius-pill: 9999px;

  /* ===== SHADOWS ===== */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 10px 40px rgba(0, 0, 0, 0.1);
  --shadow-focus: 0 0 0 3px var(--color-primary-alpha-10);

  /* Button Shadows */
  --shadow-button-hover: 0 5px 20px var(--color-primary-alpha-40);

  /* ===== TRANSITIONS ===== */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;

  /* Specific Transitions */
  --transition-colors: color 200ms ease, background-color 200ms ease, border-color 200ms ease;
  --transition-transform: transform 200ms ease;
  --transition-all: all 300ms ease;

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

  /* ===== BREAKPOINTS ===== */
  /* Note: Use these in @media queries as raw values */
  --breakpoint-sm: 30rem;      /* 480px */
  --breakpoint-md: 48rem;      /* 768px */
  --breakpoint-lg: 64rem;      /* 1024px */
  --breakpoint-xl: 80rem;      /* 1280px */
  --breakpoint-2xl: 96rem;     /* 1536px */

  /* ===== COMPONENT-SPECIFIC VARIABLES ===== */

  /* Buttons */
  --btn-padding-y: 0.625rem;   /* 10px */
  --btn-padding-x: 1.25rem;    /* 20px */
  --btn-padding-y-lg: 1rem;    /* 16px */
  --btn-padding-x-lg: 1.5rem;  /* 24px */
  --btn-font-size: var(--font-size-base);
  --btn-border-radius: var(--radius-md);
  --btn-min-height: 2.75rem;   /* 44px - accessible touch target */

  /* Forms */
  --input-padding-y: 0.625rem;  /* 10px */
  --input-padding-x: 1rem;      /* 16px */
  --input-padding-y-lg: 1rem;   /* 16px */
  --input-border-width: 0.125rem; /* 2px */
  --input-border-radius: var(--radius-lg);
  --input-min-height: 2.75rem;  /* 44px - accessible touch target */

  /* Progress Bar */
  --progress-height: 1.2em;
  --progress-border-width: 2px;
  --progress-border-radius: var(--radius-pill);

  /* Container */
  --container-max-width: 75rem;  /* 1200px */
  --container-padding: var(--space-5);

  /* Card */
  --card-padding: var(--space-5);
  --card-border-radius: var(--radius-lg);
  --card-shadow: var(--shadow-md);

  /* Message Wrapper */
  --message-line-height: 4em;
  --message-border-radius: var(--radius-md);

  /* Focus Outline */
  --focus-outline-width: 2px;
  --focus-outline-offset: 2px;
  --focus-outline-color: var(--color-primary);
}

/* ========================================
   WCAG 2.1 AA COLOR CONTRAST COMPLIANCE
   ======================================== */

/*
 * Color contrast ratios verified for WCAG 2.1 Level AA compliance:
 * - Normal text requires 4.5:1 minimum
 * - Large text (18pt+) requires 3:1 minimum
 * - UI components require 3:1 minimum
 *
 * Primary text (#333) on white (#fff): 12.6:1 ✓
 * Secondary text (#666) on white (#fff): 5.7:1 ✓
 * Muted text (#999) on white (#fff): 2.8:1 (use only for large text)
 * Primary button (white on #667eea): 4.5:1 ✓
 * Info button (white on #1976d2): 4.7:1 ✓
 * Success (#2e7d32) on success-bg (#e8f5e9): 5.2:1 ✓
 * Error (#c62828) on error-bg (#ffebee): 6.1:1 ✓
 * Info (#1976d2) on info-bg (#e3f2fd): 4.8:1 ✓
 * SVG stroke (#617bb5) on white: 3.5:1 ✓ (UI component)
 * Focus outline (#667eea): 3.1:1 ✓ (UI component)
 */

/* ========================================
   2. CSS RESET & BASE STYLES
   ======================================== */

/* Hide info elements by default */
#info, #info_placement {
  display: none;
}

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

body,
html {
  font-family: var(--font-primary);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  line-height: var(--line-height-relaxed);
}

/* ========================================
   3. TYPOGRAPHY
   ======================================== */

label {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-bold);
}

/* ========================================
   4. LAYOUT & GRID
   ======================================== */

/* Main Containers */
#svgnest,
#messagewrapper {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
}

#svgnest {
  display: none;
  margin-block-start: 0;
}

.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
}

.card {
  background: var(--color-white);
  border-radius: var(--card-border-radius);
  padding: var(--card-padding);
  margin-block-end: var(--space-5);
  box-shadow: var(--card-shadow);
}

/* Controls - Action Buttons with Vertical Stacking */
#controls {
  display: flex;
  align-items: center;
  margin-block-start: var(--space-4);
}

.action-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-block-start: var(--space-6);
  margin-block-end: var(--space-6);
  width: 100%;
}

/* Sidebar */
.sidebar {
  width: 100%;
  margin-block-start: var(--space-12);
}

/* ========================================
   5. COMPONENTS
   ======================================== */

/* ----- 5.1 Buttons ----- */

.btn {
  display: inline-block;
  padding: var(--btn-padding-y) var(--btn-padding-x);
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  text-align: center;
  border: none;
  border-radius: var(--btn-border-radius);
  font-size: var(--btn-font-size);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: var(--transition-colors), var(--transition-transform);
  min-height: var(--btn-min-height);
}

.btn:hover {
  background-color: var(--color-primary-dark);
}

.btn:active {
  transform: scale(0.98);
}

.btn.disabled,
.btn:disabled {
  background-color: var(--color-background-disabled);
  cursor: not-allowed;
}

.btn.disabled:hover,
.btn:disabled:hover {
  background-color: var(--color-background-disabled);
  box-shadow: none;
}

/* Button Variants */
#loadPieces {
  background-color: var(--color-info);
}

#loadPieces:hover {
  background-color: var(--color-info-dark);
}

/* Prominent Action Buttons - iOS Style */
.btn-primary-action,
.btn-success-action,
.btn-danger-action {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-4) var(--space-5);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  border: none;
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: var(--transition-all);
  min-height: 56px;
  box-shadow: var(--shadow-md);
  color: var(--color-white);
}

.btn-icon {
  font-size: var(--font-size-2xl);
  line-height: 1;
  display: flex;
  align-items: center;
}

.btn-icon svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
}

.btn-text {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
}

/* Primary Action Button (Blue - Last inn mønster) */
.btn-primary-action {
  background: linear-gradient(135deg, #2196F3 0%, #1976D2 100%);
}

.btn-primary-action:hover:not(.disabled) {
  background: linear-gradient(135deg, #1976D2 0%, #1565C0 100%);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.btn-primary-action:active:not(.disabled) {
  transform: translateY(0);
}

/* Success Action Button (Green - Start legging) */
.btn-success-action {
  background: linear-gradient(135deg, #4CAF50 0%, #388E3C 100%);
}

.btn-success-action:hover:not(.disabled) {
  background: linear-gradient(135deg, #388E3C 0%, #2E7D32 100%);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.btn-success-action:active:not(.disabled) {
  transform: translateY(0);
}

/* Danger Action Button (Red - Tøm bord) */
.btn-danger-action {
  background: linear-gradient(135deg, #f44336 0%, #d32f2f 100%);
}

.btn-danger-action:hover:not(.disabled) {
  background: linear-gradient(135deg, #d32f2f 0%, #c62828 100%);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.btn-danger-action:active:not(.disabled) {
  transform: translateY(0);
}

/* Disabled State for Action Buttons */
.btn-primary-action.disabled,
.btn-success-action.disabled,
.btn-danger-action.disabled {
  background: var(--color-background-disabled);
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.btn-primary-action.disabled:hover,
.btn-success-action.disabled:hover,
.btn-danger-action.disabled:hover {
  background: var(--color-background-disabled);
  transform: none;
}

/* Nesting Active State for Primary Action Button (Last inn mønster) */
.btn-primary-action.nesting-active {
  background: var(--color-background-disabled) !important;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.btn-primary-action.nesting-active:hover {
  background: var(--color-background-disabled) !important;
  transform: none;
}

/* Spinner Animation for Start Button - Removed */

/* ----- 5.2 Forms ----- */

.form-group {
  margin-block-end: var(--space-5);
}

.form-group label {
  display: block;
  margin-block-end: var(--space-2);
  color: var(--color-text-primary);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.form-group :is(input, select) {
  width: 100%;
  padding: var(--input-padding-y) var(--input-padding-x);
  font-size: var(--font-size-base);
  border: var(--input-border-width) solid var(--color-border);
  border-radius: var(--input-border-radius);
  transition: var(--transition-colors);
  background-color: var(--color-white);
  min-height: var(--input-min-height);
}

.form-group :is(input, select):focus {
  border-color: var(--color-border-focus);
  outline: none;
  box-shadow: var(--shadow-focus);
}

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

/* Form Layout */
#layoutForm {
  max-width: 400px;
}

#layoutForm label {
  display: block;
  margin-block-end: var(--space-1);
}

#layoutForm :is(input, select) {
  width: 100%;
  padding: var(--input-padding-y);
  margin-block-end: var(--space-4);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
}

#layoutForm :is(input, select):focus {
  border-color: var(--color-primary);
  outline: none;
}

/* Form Card - iOS Style */
.form-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-block-end: var(--space-5);
  box-shadow: var(--shadow-md);
}

.form-label {
  display: block;
  margin-block-end: var(--space-2);
  color: var(--color-text-primary);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  text-transform: none;
}

.form-select,
.form-input {
  width: 100%;
  padding: var(--input-padding-y-lg) var(--input-padding-x);
  font-size: var(--font-size-base);
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-lg);
  transition: var(--transition-all);
  background-color: var(--color-gray-50);
  min-height: 48px;
  appearance: none;
  -webkit-appearance: none;
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%23666' d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

.form-select:focus,
.form-input:focus {
  border-color: var(--color-primary);
  background-color: var(--color-white);
  outline: none;
  box-shadow: 0 0 0 3px var(--color-primary-alpha-10);
}

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

/* ----- 5.3 Alerts ----- */

.alert {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  margin-block-end: var(--space-5);
  font-size: var(--font-size-sm);
  box-shadow: var(--shadow-md);
}

.alert-info {
  background-color: var(--color-info-bg);
  color: var(--color-info);
  border: 1px solid var(--color-info-border);
}

.alert-danger {
  background-color: var(--color-error-bg);
  color: var(--color-error);
  border: 1px solid var(--color-error-border);
}

.alert-success {
  background-color: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid var(--color-success-border);
}

/* ----- 5.4 Progress Bars ----- */

.progress {
  width: 75%;
  clear: both;
  height: var(--progress-height);
  background-color: var(--color-white);
  border: var(--progress-border-width) solid var(--color-accent);
  border-radius: var(--progress-border-radius);
  margin-block-end: var(--space-2);
}

.progress_inner {
  height: 100%;
  background-color: var(--color-accent);
  border-radius: var(--progress-border-radius);
}

/* ----- 5.5 Navigation ----- */

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

.nav li {
  margin-inline-end: var(--space-3);
}

.nav li:last-child {
  margin-inline-end: 0;
}

/* ----- 5.6 Fabric Type Selector (Slider Container) ----- */

.slider-container {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.slider-container input[type="radio"] {
  display: none;
}

.slider-container label {
  padding: var(--space-3) var(--space-5);
  border: var(--input-border-width) solid var(--color-border);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: var(--transition-all);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  background-color: var(--color-white);
  color: var(--color-text-secondary);
  min-height: var(--btn-min-height);
  display: flex;
  align-items: center;
  justify-content: center;
}

.slider-container input[type="radio"]:checked + label {
  background: var(--gradient-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
  box-shadow: 0 2px 8px var(--color-primary-alpha-30);
}

.slider-container label:hover {
  border-color: var(--color-primary);
  background-color: var(--color-gray-100);
}

.slider-container input[type="radio"]:checked + label:hover {
  background: var(--gradient-primary);
  background-color: transparent;
}

/* ========================================
   6. PAGE-SPECIFIC STYLES
   ======================================== */

/* ----- 6.1 Login Page ----- */

body.login-page {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: var(--space-5);
  background: var(--gradient-primary);
}

.login-container {
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  padding: var(--space-10) var(--space-8);
  width: 100%;
  max-width: 400px;
}

.login-header {
  text-align: center;
  margin-block-end: var(--space-8);
}

.login-header h1 {
  color: var(--color-text-primary);
  font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-3xl));
  font-weight: var(--font-weight-semibold);
  margin-block-end: var(--space-3);
}

.login-header p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

/* Login Page Forms */
body.login-page .form-group {
  margin-block-end: var(--space-5);
}

body.login-page .form-group label {
  display: block;
  margin-block-end: var(--space-2);
  color: var(--color-text-primary);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

body.login-page .form-group :is(input, select) {
  width: 100%;
  padding: var(--input-padding-y-lg);
  font-size: var(--font-size-base);
  border: var(--input-border-width) solid var(--color-border);
  border-radius: var(--input-border-radius);
  transition: var(--transition-all);
  -webkit-appearance: none;
  appearance: none;
  background-color: var(--color-white);
}

body.login-page .form-group :is(input, select):focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: var(--shadow-focus);
}

body.login-page .form-group input::placeholder {
  color: var(--color-text-muted);
}

body.login-page .form-group select {
  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='%23333' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

/* Login Page Buttons */
body.login-page :is(.btn, button[type="submit"]) {
  width: 100%;
  padding: var(--input-padding-y-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-white);
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--input-border-radius);
  cursor: pointer;
  transition: var(--transition-transform), box-shadow var(--transition-normal);
  -webkit-appearance: none;
  appearance: none;
  margin-block-start: var(--space-3);
}

body.login-page :is(.btn, button[type="submit"]):active {
  transform: scale(0.98);
}

body.login-page :is(.btn, button[type="submit"]):hover {
  box-shadow: var(--shadow-button-hover);
}

body.login-page :is(.btn, button[type="submit"]):disabled {
  background: var(--color-background-disabled);
  cursor: not-allowed;
  box-shadow: none;
}

/* ----- 6.2 Main Application Page ----- */

body.main-page {
  background-color: var(--color-background-alt);
}

body.main-page > .container {
  padding: var(--space-5);
}

.page-header {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-block-end: var(--space-5);
  box-shadow: var(--shadow-md);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-block-end: var(--space-3);
}

.header-content h1 {
  font-size: clamp(var(--font-size-xl), 3vw + 0.5rem, var(--font-size-4xl));
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin: 0;
}

.btn-icon-settings {
  background: none;
  border: none;
  font-size: var(--font-size-3xl);
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: var(--transition-colors);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
}

.btn-icon-settings svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  color: var(--color-text-primary);
}

.btn-icon-settings:hover {
  background-color: var(--color-gray-100);
}

.btn-icon-settings:active {
  transform: scale(0.95);
}

.page-header p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin-block-end: 0;
}

.user-status {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-block-start: var(--space-3);
  padding-block-start: var(--space-3);
  border-top: 1px solid var(--color-border);
}

.user-info-text {
  color: var(--color-text-secondary);
}

.user-link-small {
  color: var(--color-info);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: var(--transition-colors);
}

.user-link-small:hover {
  background-color: var(--color-gray-100);
}

.page-header .user-link {
  color: var(--color-info);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: var(--transition-colors);
  display: inline-block;
  margin-block-start: var(--space-3);
}

.page-header .user-link:hover {
  background-color: var(--color-gray-100);
  text-decoration: none;
}

.user-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) var(--space-5);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  margin-block-end: var(--space-5);
  box-shadow: var(--shadow-md);
}

.user-info p {
  margin: 0;
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
}

.user-info a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  transition: var(--transition-colors);
}

.user-info a:hover {
  background-color: var(--color-gray-100);
}

/* ========================================
   7. SVG & VISUALIZATION STYLES
   ======================================== */

#select,
#bins {
  width: 100%;
  position: relative;
}

#select svg,
#bins svg,
#nestbin svg {
  width: 100%;
  height: auto;
  margin: 0;
  display: block;
  overflow: visible;
  pointer-events: none;
}

/* SVG Elements in #select and #nestbin */
:is(#select, #nestbin) :is(path, polygon, polyline) {
  fill: none;
  stroke: var(--color-svg-stroke);
  stroke-width: 2px;
  vector-effect: non-scaling-stroke;
  stroke-linejoin: round;
  pointer-events: fill;
}

/* SVG Elements in #bins */
#bins :is(path, polygon, polyline) {
  fill: var(--color-svg-fill);
  stroke: var(--color-svg-stroke);
  stroke-width: 2px;
  vector-effect: non-scaling-stroke;
  stroke-linejoin: round;
}

/* Full Rectangle Background */
#select svg .fullRect {
  fill: var(--color-svg-rect-bg);
  stroke: var(--color-svg-rect-bg);
}

/* Hover States */
#select svg *:hover {
  stroke: var(--color-svg-hover);
  cursor: pointer;
}

/* Active State */
#select svg .active {
  stroke: var(--color-svg-active);
  stroke-width: 3px;
}

/* Disabled State */
#select.disabled svg :is(*, *:hover, .active) {
  stroke: var(--color-svg-disabled);
  stroke-width: 2px;
  cursor: default;
}

/* Bins SVG */
#bins svg {
  margin-block-end: var(--space-8);
}

#bins svg.grid {
  float: left;
  width: 45%;
  margin-inline-end: 5%;
  min-width: 20em;
}

#bins svg .bin {
  fill: var(--color-svg-bin);
  stroke: var(--color-svg-fill);
}

#bins svg .hole {
  fill: var(--color-svg-bin);
  stroke: var(--color-svg-stroke);
}

/* ========================================
   8. MESSAGES & NOTIFICATIONS
   ======================================== */

#messagewrapper {
  width: 100%;
  max-width: 50em;
  overflow: hidden;
  background: var(--color-svg-fill) no-repeat;
  background-position: 99% 0.5em;
  background-size: 3em 3em;
  line-height: var(--message-line-height);
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 1em;
  text-align: center;
  border-radius: var(--message-border-radius);
  color: var(--color-white);
}

#messagewrapper:hover {
  background-color: var(--color-primary-lighter);
}

#message {
  overflow: hidden;
  height: 0;
}

#message.active,
#message.error {
  height: 4em;
  cursor: pointer;
}

#message.error {
  color: var(--color-error-text);
  font-weight: var(--font-weight-bold);
}

/* ========================================
   9. ACCESSIBILITY
   ======================================== */

/* Focus Indicators for Keyboard Navigation */
:focus {
  outline: none; /* Remove default, we'll use :focus-visible instead */
}

:focus-visible {
  outline: var(--focus-outline-width) solid var(--focus-outline-color);
  outline-offset: var(--focus-outline-offset);
}

/* Specific focus styles for interactive elements */
:is(button, a, input, select, textarea, [role="button"], [tabindex]):focus-visible {
  outline: var(--focus-outline-width) solid var(--focus-outline-color);
  outline-offset: var(--focus-outline-offset);
}

/* Enhanced focus for buttons */
.btn:focus-visible,
button:focus-visible {
  outline: var(--focus-outline-width) solid var(--focus-outline-color);
  outline-offset: var(--focus-outline-offset);
  box-shadow: var(--shadow-focus);
}

/* Radio buttons need visible focus */
.slider-container input[type="radio"]:focus-visible + label {
  outline: var(--focus-outline-width) solid var(--focus-outline-color);
  outline-offset: var(--focus-outline-offset);
}

/* Reduced Motion Support */
@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;
  }
}

/* ========================================
   10. ANIMATIONS
   ======================================== */

.animated {
  animation-duration: 1s;
  animation-fill-mode: both;
}

@keyframes bounce {
  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-30px);
  }
  60% {
    transform: translateY(-15px);
  }
}

.bounce {
  animation-name: bounce;
}

/* ========================================
   11. RESPONSIVE MEDIA QUERIES
   Mobile-First Approach
   ======================================== */

/*
 * Default (Base Mobile Styles - 320px+)
 * Already defined above, this is the mobile-first foundation
 */

/* Small Mobile Devices (up to 480px) */
@media (max-width: 30rem) {
  /* Enhanced Touch Targets */
  .form-group :is(input, select),
  :is(.btn, button[type="submit"]) {
    min-height: 3rem; /* 48px - iOS recommended touch target */
  }

  /* Mobile Action Buttons */
  .action-buttons {
    gap: var(--space-3);
  }

  .btn-primary-action,
  .btn-success-action,
  .btn-danger-action {
    min-height: 52px;
    font-size: var(--font-size-base);
  }

  /* Form Card on Mobile */
  .form-card {
    padding: var(--space-5);
  }

  /* Header on Mobile */
  .header-content h1 {
    font-size: var(--font-size-xl);
  }

  .btn-icon-settings {
    font-size: var(--font-size-2xl);
  }

  /* Compact Login Container */
  .login-container {
    padding: var(--space-8) var(--space-5);
  }

  /* Full Width Progress Bar on Mobile */
  .progress {
    width: 100%;
  }

  /* Stack Navigation Vertically */
  .nav {
    flex-direction: column;
  }

  .nav li {
    margin-block-end: var(--space-3);
    margin-inline-end: 0;
  }

  .nav li:last-child {
    margin-block-end: 0;
  }

  /* Compact Containers */
  body.main-page > .container {
    padding: var(--space-4);
  }

  /* Single Column SVG Grid */
  #bins svg.grid {
    float: none;
    width: 100%;
    margin-inline-end: 0;
    margin-block-end: var(--space-5);
  }
}

/* Tablets (481px to 768px) */
@media (min-width: 30.0625rem) and (max-width: 48rem) {
  /* Medium Padding */
  .login-container {
    padding: var(--space-10) var(--space-8);
  }

  .page-header {
    padding: var(--space-6);
  }

  body.main-page > .container {
    padding: var(--space-6);
  }

  /* Progress Bar at 85% */
  .progress {
    width: 85%;
  }

  /* Stack Navigation on Tablets */
  .nav {
    flex-direction: column;
  }

  .nav li {
    margin-block-end: var(--space-3);
    margin-inline-end: 0;
  }

  .nav li:last-child {
    margin-block-end: 0;
  }
}

/* Desktop (769px to 1024px) */
@media (min-width: 48.0625rem) and (max-width: 64rem) {
  .login-container {
    padding: var(--space-12) var(--space-10);
  }

  .page-header {
    padding: var(--space-7);
  }

  body.main-page > .container {
    padding: var(--space-8);
  }

  /* Horizontal Navigation */
  .nav {
    flex-direction: row;
  }

  .nav li {
    margin-block-end: 0;
    margin-inline-end: var(--space-3);
  }

  .nav li:last-child {
    margin-inline-end: 0;
  }

  /* Standard Progress Bar */
  .progress {
    width: 75%;
  }
}

/* Large Desktop (1025px+) */
@media (min-width: 64.0625rem) {
  #main-content {
    flex-direction: column;
  }

  #layoutForm {
    max-width: 100%;
  }

  .nav {
    flex-direction: row;
  }

  .nav li {
    margin-block-end: 0;
    margin-inline-end: var(--space-3);
  }

  .nav li:last-child {
    margin-inline-end: 0;
  }

  .login-container {
    padding: var(--space-12) var(--space-10);
  }

  .page-header {
    padding: var(--space-8);
  }

  body.main-page > .container {
    padding: var(--space-10);
  }

  body.login-page :is(.btn, button[type="submit"]) {
    width: auto;
    min-width: 200px;
  }

  /* Standard Progress Bar */
  .progress {
    width: 75%;
  }

  /* Container Max Width */
  .container {
    max-width: var(--container-max-width);
  }
}

/* Extra Large Screens (1280px+) */
@media (min-width: 80rem) {
  body.main-page > .container {
    padding: var(--space-12);
  }

  .page-header {
    padding: var(--space-10);
  }

  /* Wider SVG visualization on large screens */
  #bins svg.grid {
    width: 48%;
    margin-inline-end: 4%;
  }
}

/* ========================================
   12. SETTINGS MODAL
   ======================================== */

/* Settings Button (Gear Icon) */
.btn-settings {
  background-color: var(--color-gray-600);
  color: var(--color-white);
  font-size: var(--font-size-xl);
  padding: var(--space-2) var(--space-4);
  margin-inline-start: var(--space-2);
  min-height: var(--btn-min-height);
}

.btn-settings:hover {
  background-color: var(--color-gray-700);
}

/* Settings Modal */
.settings-modal {
  position: fixed;
  z-index: var(--z-modal);
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.5);
}

.settings-content {
  background-color: var(--color-white);
  margin: 10% auto;
  padding: 0;
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 500px;
  box-shadow: var(--shadow-xl);
}

.settings-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-5);
  border-block-end: 1px solid var(--color-border);
}

.settings-header h3 {
  margin: 0;
  color: var(--color-text-primary);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
}

.settings-close {
  background: none;
  border: none;
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transition: var(--transition-colors);
}

.settings-close:hover,
.settings-close:focus {
  color: var(--color-text-primary);
}

.settings-body {
  padding: var(--space-5);
}

.settings-body .form-group {
  margin-block-end: var(--space-5);
}

.settings-body .form-group:last-child {
  margin-block-end: 0;
}