/**
 * Kavatar Protocol - Main Stylesheet
 * Kaspa brand colors: #55ECC7 (primary), #0A1F1C (dark), #4A6B5F (secondary)
 */

/* ==========================================================================
   CSS Variables
   ========================================================================== */
:root {
  /* Kaspa Brand Colors */
  --kaspa-primary: #55ECC7;
  --kaspa-primary-dark: #3DD4B0;
  --kaspa-dark: #0A1F1C;
  --kaspa-darker: #061614;
  --kaspa-secondary: #4A6B5F;
  --kaspa-gray: #8B9D96;
  --kaspa-light: #E8F5F1;
  
  /* Achievement Colors */
  --bronze: #CD7F32;
  --bronze-light: #E8B87A;
  --silver: #C0C0C0;
  --silver-light: #E8E8E8;
  --gold: #FFD700;
  --gold-light: #FFF4B8;
  
  /* UI Colors */
  --bg-primary: #0A1F1C;
  --bg-secondary: #0F2D28;
  --bg-tertiary: #143D36;
  --text-primary: #FFFFFF;
  --text-secondary: #8B9D96;
  --text-muted: #5A7A70;
  --border-color: #1A3D36;
  --error: #FF6B6B;
  --success: #55ECC7;
  --warning: #FFD93D;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px rgba(85, 236, 199, 0.15);
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

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

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

img {
  max-width: 100%;
  height: auto;
}

/* ==========================================================================
   Layout
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

.section-alt {
  background: var(--bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--kaspa-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ==========================================================================
   Header
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 31, 28, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo:hover {
  color: var(--text-primary);
}

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

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
}

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

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

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

.wallet-address {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--kaspa-primary);
  background: rgba(85, 236, 199, 0.1);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: var(--space-lg);
  z-index: 999;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.mobile-nav-link {
  color: var(--text-secondary);
  font-size: 1.125rem;
  font-weight: 500;
  padding: var(--space-sm) 0;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-primary);
  font-size: 0.9375rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

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

.btn-primary:hover:not(:disabled) {
  background: var(--kaspa-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(85, 236, 199, 0.3);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

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

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

.btn-ghost:hover:not(:disabled) {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.btn-lg {
  padding: var(--space-lg) var(--space-xl);
  font-size: 1rem;
}

.btn-sm {
  padding: var(--space-sm) var(--space-md);
  font-size: 0.875rem;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  position: relative;
  padding: calc(72px + var(--space-3xl)) 0 var(--space-3xl);
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-badge {
  margin-bottom: var(--space-lg);
}

.badge {
  display: inline-block;
  padding: var(--space-sm) var(--space-md);
  background: rgba(85, 236, 199, 0.1);
  color: var(--kaspa-primary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(85, 236, 199, 0.2);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-lg);
}

.gradient-text {
  background: linear-gradient(135deg, var(--kaspa-primary) 0%, #3DD4B0 50%, #2BC4A0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-3xl);
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-3xl);
}

.stat {
  text-align: center;
}

.stat-value {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--kaspa-primary);
}

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

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.3;
}

.orb-1 {
  width: 600px;
  height: 600px;
  background: var(--kaspa-primary);
  top: -200px;
  right: -200px;
}

.orb-2 {
  width: 400px;
  height: 400px;
  background: var(--kaspa-secondary);
  bottom: -100px;
  left: -100px;
}

.orb-3 {
  width: 300px;
  height: 300px;
  background: var(--kaspa-primary);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0.1;
}

/* ==========================================================================
   Upload Section
   ========================================================================== */
.upload-container {
  max-width: 800px;
  margin: 0 auto;
}

.upload-step {
  display: none;
  gap: var(--space-lg);
  padding: var(--space-xl);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  margin-bottom: var(--space-lg);
}

.upload-step.active {
  display: flex;
}

.step-number {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--kaspa-primary);
  color: var(--kaspa-dark);
  font-weight: 700;
  border-radius: 50%;
  flex-shrink: 0;
}

.step-content {
  flex: 1;
}

.step-content h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
}

.step-description {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

/* Dropzone */
.dropzone {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.dropzone:hover {
  border-color: var(--kaspa-primary);
  background: rgba(85, 236, 199, 0.05);
}

.dropzone.dragover {
  border-color: var(--kaspa-primary);
  background: rgba(85, 236, 199, 0.1);
}

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

.dropzone-text {
  font-size: 1.125rem;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

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

.file-preview {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  margin-top: var(--space-md);
}

.file-preview img {
  width: 64px;
  height: 64px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.file-info {
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* Options */
.options-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.option-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.option-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.input, .select {
  padding: var(--space-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 0.9375rem;
  transition: border-color var(--transition-fast);
}

.input:focus, .select:focus {
  outline: none;
  border-color: var(--kaspa-primary);
}

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

.input-lg {
  padding: var(--space-lg);
  font-size: 1rem;
}

.checkbox-group {
  flex-direction: row;
  align-items: center;
}

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

.checkbox input {
  display: none;
}

.checkmark {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.checkbox input:checked + .checkmark {
  background: var(--kaspa-primary);
  border-color: var(--kaspa-primary);
}

.checkbox input:checked + .checkmark::after {
  content: '✓';
  color: var(--kaspa-dark);
  font-size: 12px;
  font-weight: 700;
}

/* Donation Tiers */
.donation-tiers {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.tier-card {
  padding: var(--space-lg);
  background: var(--bg-tertiary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tier-card:hover {
  border-color: var(--kaspa-primary);
}

.tier-card.selected {
  border-color: var(--kaspa-primary);
  background: rgba(85, 236, 199, 0.1);
}

.tier-icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
}

.tier-name {
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.tier-amount {
  color: var(--kaspa-primary);
  font-weight: 700;
}

.tier-min {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.tier-features {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: var(--space-sm);
}

.donation-input-group {
  margin-top: var(--space-lg);
}

.donation-info {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.achievement-preview {
  margin-top: var(--space-lg);
  padding: var(--space-md);
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
}

.preview-label {
  color: var(--text-secondary);
}

.preview-level {
  color: var(--kaspa-primary);
  font-weight: 600;
}

/* Upload Progress */
.upload-progress {
  padding: var(--space-xl);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.progress-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.progress-bar {
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: var(--space-lg);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--kaspa-primary), var(--kaspa-primary-dark));
  border-radius: var(--radius-sm);
  transition: width var(--transition-normal);
}

.progress-steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.progress-step {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.progress-step::before {
  content: '○';
  color: var(--text-muted);
}

.progress-step.active::before {
  content: '◐';
  color: var(--kaspa-primary);
}

.progress-step.completed::before {
  content: '✓';
  color: var(--kaspa-primary);
}

/* Upload Success */
.upload-success {
  text-align: center;
  padding: var(--space-2xl);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.success-icon {
  font-size: 4rem;
  margin-bottom: var(--space-lg);
}

.upload-success h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
}

.upload-success > p {
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}

.success-details {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
  text-align: left;
}

.detail-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--border-color);
}

.detail-row:last-child {
  border-bottom: none;
}

.detail-label {
  color: var(--text-secondary);
  font-size: 0.875rem;
  min-width: 120px;
}

.detail-value {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  word-break: break-all;
}

.success-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
}

/* ==========================================================================
   Resolve Section
   ========================================================================== */
.resolve-container {
  max-width: 700px;
  margin: 0 auto;
}

.resolve-tabs {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.tab-btn {
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-family: var(--font-primary);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--text-primary);
  border-color: var(--kaspa-primary);
}

.tab-btn.active {
  background: var(--kaspa-primary);
  border-color: var(--kaspa-primary);
  color: var(--kaspa-dark);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.input-group {
  display: flex;
  gap: var(--space-md);
}

.input-group .input {
  flex: 1;
}

/* ==========================================================================
   Verify Section
   ========================================================================== */
.verify-container {
  max-width: 900px;
  margin: 0 auto;
}

.verify-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.verify-card {
  padding: var(--space-xl);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.verify-card h3 {
  margin-bottom: var(--space-sm);
}

.verify-card p {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  font-size: 0.9375rem;
}

.verify-result {
  margin-top: var(--space-xl);
  padding: var(--space-xl);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

/* ==========================================================================
   Achievements Section
   ========================================================================== */
.achievements-container {
  max-width: 1000px;
  margin: 0 auto;
}

.achievements-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-3xl);
}

.achievement-card {
  text-align: center;
}

.achievement-frame {
  width: 120px;
  height: 120px;
  margin: 0 auto var(--space-lg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.achievement-frame.bronze {
  background: linear-gradient(135deg, var(--bronze), var(--bronze-light));
  box-shadow: 0 0 30px rgba(205, 127, 50, 0.3);
}

.achievement-frame.silver {
  background: linear-gradient(135deg, var(--silver), var(--silver-light));
  box-shadow: 0 0 30px rgba(192, 192, 192, 0.3);
}

.achievement-frame.gold {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  box-shadow: 0 0 30px rgba(255, 215, 0, 0.3);
}

.frame-placeholder {
  width: 100px;
  height: 100px;
  background: var(--bg-tertiary);
  border-radius: 50%;
}

.achievement-info h3 {
  margin-bottom: var(--space-xs);
}

.achievement-range {
  color: var(--kaspa-primary);
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.achievement-benefits {
  list-style: none;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.achievement-benefits li {
  padding: var(--space-xs) 0;
}

.achievement-benefits li::before {
  content: '✓';
  color: var(--kaspa-primary);
  margin-right: var(--space-sm);
}

/* Leaderboard */
.leaderboard-section {
  margin-top: var(--space-3xl);
}

.leaderboard-section h3 {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.leaderboard {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.leaderboard-row {
  display: grid;
  grid-template-columns: 60px 1fr 100px 100px;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border-color);
}

.leaderboard-row:last-child {
  border-bottom: none;
}

.leaderboard-row.header {
  background: var(--bg-tertiary);
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.leaderboard-rank {
  font-weight: 700;
  color: var(--kaspa-primary);
}

.leaderboard-address {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.leaderboard-level {
  text-align: center;
}

.leaderboard-amount {
  text-align: right;
  font-weight: 600;
  color: var(--kaspa-primary);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background: var(--kaspa-darker);
  border-top: 1px solid var(--border-color);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-2xl);
}

.footer-description {
  color: var(--text-secondary);
  margin-top: var(--space-md);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.footer-column h4 {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.footer-column a {
  display: block;
  color: var(--text-secondary);
  padding: var(--space-xs) 0;
  font-size: 0.9375rem;
}

.footer-column a:hover {
  color: var(--kaspa-primary);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-color);
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-version {
  font-family: var(--font-mono);
}

/* ==========================================================================
   Utilities
   ========================================================================== */
.hidden {
  display: none !important;
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-top-color: var(--kaspa-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.toast {
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  animation: toastIn 0.3s ease;
}

.toast.success {
  border-color: var(--kaspa-primary);
}

.toast.error {
  border-color: var(--error);
}

.toast.warning {
  border-color: var(--warning);
}

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

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.5rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .achievements-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .donation-tiers {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav {
    display: none;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .mobile-menu.active {
    display: block;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: var(--space-lg);
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .options-grid {
    grid-template-columns: 1fr;
  }
  
  .donation-tiers {
    grid-template-columns: 1fr;
  }
  
  .verify-options {
    grid-template-columns: 1fr;
  }
  
  .achievements-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .footer-links {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }
  
  .input-group {
    flex-direction: column;
  }
  
  .upload-step {
    flex-direction: column;
  }
  
  .step-number {
    align-self: flex-start;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }
  
  .hero {
    padding-top: calc(72px + var(--space-xl));
  }
  
  .section {
    padding: var(--space-2xl) 0;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   NEW: Donation Bar with Gradient
   ========================================================================== */
.donation-section {
  margin-top: var(--space-lg);
}

.donation-bar-container {
  width: 100%;
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  margin-top: var(--space-md);
  overflow: hidden;
}

.donation-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #6B7280 0%, #55ECC7 100%);
  border-radius: var(--radius-sm);
  transition: width 0.3s ease, background 0.3s ease;
}

.donation-extra {
  margin-top: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: rgba(85, 236, 199, 0.1);
  border: 1px solid var(--kaspa-primary);
  border-radius: var(--radius-md);
  color: var(--kaspa-primary);
  font-weight: 700;
  font-size: 1.125rem;
  text-align: center;
  animation: pulseExtra 2s ease-in-out infinite;
}

@keyframes pulseExtra {
  0%, 100% { box-shadow: 0 0 0 0 rgba(85, 236, 199, 0.4); }
  50% { box-shadow: 0 0 20px 5px rgba(85, 236, 199, 0.2); }
}

/* ==========================================================================
   NEW: Conversion Notice
   ========================================================================== */
.conversion-notice {
  margin-top: var(--space-md);
  padding: var(--space-lg);
  background: rgba(255, 217, 61, 0.1);
  border: 1px solid var(--warning);
  border-radius: var(--radius-md);
}

.conversion-notice h4 {
  color: var(--warning);
  margin-bottom: var(--space-sm);
}

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

/* ==========================================================================
   NEW: Large File Notice
   ========================================================================== */
.large-file-notice {
  margin-top: var(--space-md);
  padding: var(--space-md);
  background: rgba(85, 236, 199, 0.05);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.large-file-notice .notice-info {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* ==========================================================================
   NEW: Fee Breakdown with Optimization
   ========================================================================== */
.fee-breakdown {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.fee-row {
  display: flex;
  justify-content: space-between;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--border-color);
}

.fee-row:last-child {
  border-bottom: none;
}

.fee-row.total {
  font-weight: 700;
  color: var(--kaspa-primary);
  font-size: 1.125rem;
  margin-top: var(--space-sm);
  padding-top: var(--space-md);
  border-top: 2px solid var(--border-color);
}

/* ==========================================================================
   NEW: Result Display Styles
   ========================================================================== */
.result-content {
  text-align: center;
  padding: var(--space-xl);
}

.result-avatar {
  max-width: 300px;
  max-height: 300px;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-lg);
}

.result-details {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  text-align: left;
}

.result-error {
  padding: var(--space-lg);
  background: rgba(255, 107, 107, 0.1);
  border: 1px solid var(--error);
  border-radius: var(--radius-md);
  color: var(--error);
  text-align: center;
}

.result-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-2xl);
  color: var(--text-secondary);
}

/* Verify Result */
.verify-result-content {
  padding: var(--space-lg);
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
}

.verify-success, .verify-failed {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 1.125rem;
  font-weight: 600;
}

.verify-success {
  background: rgba(85, 236, 199, 0.1);
  border: 1px solid var(--kaspa-primary);
  color: var(--kaspa-primary);
}

.verify-failed {
  background: rgba(255, 107, 107, 0.1);
  border: 1px solid var(--error);
  color: var(--error);
}

.verify-icon {
  font-size: 1.5rem;
}

/* Estimation Loading */
.estimation-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-lg);
  color: var(--text-secondary);
}

/* Upload Actions */
.upload-actions {
  display: flex;
  justify-content: space-between;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}