/* RESET & BASE STYLES */
:root {
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --primary-light: #60a5fa;
  --secondary: #10b981;
  --accent: #f59e0b;
  --danger: #ef4444;
  --success: #10b981;
  --dark: #0f172a;
  --dark-light: #1e293b;
  --light: #f8fafc;
  --gray: #64748b;
  --gray-light: #e2e8f0;
  --card-bg: rgba(30, 41, 59, 0.7);
  --card-border: rgba(255, 255, 255, 0.1);
  --shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.3);
  --radius: 16px;
  --radius-sm: 8px;
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--dark);
  color: var(--light);
  line-height: 1.6;
  overflow-x: hidden;
  transition: var(--transition);
}

body.light-mode {
  --dark: #f8fafc;
  --dark-light: #e2e8f0;
  --light: #0f172a;
  --gray: #94a3b8;
  --gray-light: #475569;
  --card-bg: rgba(255, 255, 255, 0.9);
  --card-border: rgba(0, 0, 0, 0.1);
}

h1, h2, h3, h4 {
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
}

/* BACKGROUND ANIMATION */
.background-animation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}

.gradient-circle {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
}

.circle-1 {
  width: 400px;
  height: 400px;
  background: var(--primary);
  top: -200px;
  right: -100px;
  animation: float 20s infinite alternate;
}

.circle-2 {
  width: 300px;
  height: 300px;
  background: var(--secondary);
  bottom: -150px;
  left: -100px;
  animation: float 25s infinite alternate-reverse;
}

.circle-3 {
  width: 200px;
  height: 200px;
  background: var(--accent);
  top: 50%;
  left: 70%;
  animation: float 15s infinite;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-30px, -30px) scale(1.1); }
}

/* NAVBAR */
.navbar {
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo i {
  font-size: 28px;
  color: var(--primary);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo h1 {
  font-size: 24px;
  font-weight: 700;
}

.logo span {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 25px;
}

.nav-links a {
  color: var(--gray);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
}

.nav-links a:hover {
  color: var(--primary);
  background: rgba(59, 130, 246, 0.1);
}

.theme-toggle {
  display: flex;
  align-items: center;
  background: var(--dark-light);
  border: none;
  padding: 5px;
  border-radius: 50px;
  cursor: pointer;
  position: relative;
  width: 60px;
  height: 30px;
}

.theme-toggle i {
  font-size: 14px;
  color: var(--light);
  z-index: 2;
  position: relative;
  padding: 0 5px;
}

.theme-toggle .toggle-circle {
  position: absolute;
  left: 3px;
  top: 3px;
  width: 24px;
  height: 24px;
  background: var(--primary);
  border-radius: 50%;
  transition: var(--transition);
}

body.light-mode .theme-toggle .toggle-circle {
  left: 33px;
}

/* HEADER SECTION */
.header-section {
  max-width: 1200px;
  margin: 40px auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.header-content {
  animation: slideInLeft 0.8s ease;
}

.main-title {
  font-size: 3.5rem;
  line-height: 1.2;
  margin-bottom: 15px;
}

.highlight {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  position: relative;
}

.highlight::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 2px;
}

.subtitle {
  font-size: 1.2rem;
  color: var(--gray);
  margin-bottom: 30px;
  max-width: 500px;
}

.header-stats {
  display: flex;
  gap: 25px;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(59, 130, 246, 0.1);
  padding: 10px 20px;
  border-radius: var(--radius);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.stat i {
  color: var(--primary);
  font-size: 18px;
}

.stat span {
  font-size: 14px;
  font-weight: 500;
}

.header-illustration {
  display: flex;
  justify-content: center;
  align-items: center;
  animation: slideInRight 0.8s ease;
}

.calendar-animation {
  display: flex;
  align-items: center;
  gap: 30px;
}

.calendar {
  background: white;
  border-radius: 12px;
  padding: 20px;
  box-shadow: var(--shadow);
  width: 140px;
  text-align: center;
}

.calendar-header {
  background: var(--primary);
  color: white;
  padding: 8px;
  border-radius: 8px;
  margin-bottom: 15px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.month {
  font-size: 16px;
  font-weight: 700;
}

.year {
  font-size: 12px;
  opacity: 0.9;
}

.calendar-days {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 10px;
}

.day {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: #f1f5f9;
  color: #475569;
  font-weight: 600;
}

.day.active {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.calendar-label {
  font-size: 12px;
  color: #64748b;
  margin-top: 10px;
}

.arrow {
  font-size: 32px;
  color: var(--primary);
}

.age-display {
  text-align: center;
}

.age-number {
  font-size: 64px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.age-label {
  font-size: 18px;
  color: var(--gray);
  font-weight: 600;
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

/* MAIN WRAPPER */
.main-wrapper {
  max-width: 1200px;
  margin: 0 auto 60px;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

@media (max-width: 1024px) {
  .main-wrapper {
    grid-template-columns: 1fr;
  }
  
  .header-section {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 30px;
  }
  
  .header-stats {
    justify-content: center;
  }
}

.panel {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  border: 1px solid var(--card-border);
  padding: 30px;
  box-shadow: var(--shadow);
}

.panel-header {
  margin-bottom: 25px;
  padding-bottom: 15px;
  border-bottom: 2px solid var(--card-border);
}

.panel-header h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.panel-header h2 i {
  color: var(--primary);
}

.panel-header p {
  color: var(--gray);
  font-size: 14px;
}

/* INPUT SECTION */
.input-section {
  margin-bottom: 30px;
}

.input-group {
  margin-bottom: 25px;
}

.input-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.input-header label {
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
}

.btn-today {
  background: rgba(59, 130, 246, 0.1);
  color: var(--primary);
  border: 1px solid rgba(59, 130, 246, 0.3);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.btn-today:hover {
  background: rgba(59, 130, 246, 0.2);
}

input[type="date"], input[type="time"] {
  width: 100%;
  padding: 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid var(--card-border);
  border-radius: var(--radius);
  color: var(--light);
  font-size: 16px;
  font-family: 'Inter', sans-serif;
  transition: var(--transition);
}

input[type="date"]:focus, input[type="time"]:focus {
  outline: none;
  border-color: var(--primary);
  background: rgba(59, 130, 246, 0.05);
}

input[type="date"]:disabled, input[type="time"]:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.date-presets {
  display: flex;
  gap: 10px;
  margin-top: 15px;
  flex-wrap: wrap;
}

.preset-btn {
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  color: var(--gray);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-width: 100px;
}

.preset-btn:hover {
  background: rgba(59, 130, 246, 0.1);
  color: var(--primary);
  border-color: var(--primary);
}

/* TOGGLE SWITCH */
.toggle-switch {
  display: flex;
  align-items: center;
}

.toggle-switch input[type="checkbox"] {
  display: none;
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.toggle-text {
  font-size: 13px;
  color: var(--gray);
}

.toggle-slider {
  width: 40px;
  height: 20px;
  background: var(--gray);
  border-radius: 20px;
  position: relative;
  transition: var(--transition);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  background: white;
  border-radius: 50%;
  top: 2px;
  left: 2px;
  transition: var(--transition);
}

.toggle-switch input[type="checkbox"]:checked + .toggle-label .toggle-slider {
  background: var(--primary);
}

.toggle-switch input[type="checkbox"]:checked + .toggle-label .toggle-slider::before {
  transform: translateX(20px);
}

/* TIME SECTION */
.time-section {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--card-border);
}

.time-section .section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
}

.time-section .section-header h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
}

.btn-toggle {
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--gray);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.btn-toggle:hover {
  background: rgba(59, 130, 246, 0.1);
  color: var(--primary);
  border-color: var(--primary);
}

.time-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 15px;
}

.time-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.time-group label {
  font-size: 14px;
  color: var(--gray);
  display: flex;
  align-items: center;
  gap: 6px;
}

.help-text {
  font-size: 12px;
  color: var(--gray);
  font-style: italic;
}

/* CALCULATE BUTTON */
.btn-calculate {
  width: 100%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border: none;
  padding: 18px;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: var(--transition);
  margin-bottom: 25px;
  position: relative;
  overflow: hidden;
}

.btn-calculate:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3);
}

.btn-calculate::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -60%;
  width: 40px;
  height: 200%;
  background: rgba(255, 255, 255, 0.2);
  transform: rotate(30deg);
  transition: left 0.5s;
}

.btn-calculate:hover::after {
  left: 120%;
}

.btn-badge {
  background: white;
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  margin-left: 10px;
}

/* FACTS SECTION */
.facts-section {
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius);
  padding: 20px;
  margin-top: 20px;
}

.facts-section h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 15px;
  font-size: 1.1rem;
}

.facts-carousel {
  height: 60px;
  position: relative;
  overflow: hidden;
}

.fact {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transform: translateX(100%);
  transition: all 0.5s ease;
  display: flex;
  align-items: center;
  padding: 10px 0;
}

.fact.active {
  opacity: 1;
  transform: translateX(0);
}

.fact p {
  font-size: 14px;
  color: var(--gray-light);
}

.fact span {
  color: var(--primary);
  font-weight: 600;
}

.carousel-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 15px;
}

.carousel-btn {
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--gray);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.carousel-btn:hover {
  background: rgba(59, 130, 246, 0.1);
  color: var(--primary);
  border-color: var(--primary);
}

.carousel-dots {
  display: flex;
  gap: 8px;
}

.dot {
  width: 8px;
  height: 8px;
  background: var(--gray);
  border-radius: 50%;
  transition: var(--transition);
}

.dot.active {
  background: var(--primary);
  transform: scale(1.2);
}

/* AGE DISPLAY SECTION */
.age-display-section {
  display: flex;
  flex-direction: column;
  gap: 25px;
}

.age-primary {
  text-align: center;
  padding: 30px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(16, 185, 129, 0.1));
  border-radius: var(--radius);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.age-main {
  margin-bottom: 20px;
}

.age-number {
  font-size: 72px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.age-units {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 10px;
}

.age-unit {
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 20px;
  font-size: 14px;
  color: var(--gray);
  cursor: pointer;
  transition: var(--transition);
}

.age-unit.active {
  background: var(--primary);
  color: white;
}

.age-detail {
  display: flex;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap;
}

.detail-item {
  text-align: center;
}

.detail-value {
  display: block;
  font-size: 28px;
  font-weight: 700;
  color: var(--light);
  margin-bottom: 4px;
}

.detail-label {
  font-size: 14px;
  color: var(--gray);
}

/* BREAKDOWN SECTION */
.breakdown-section h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  font-size: 1.1rem;
}

.breakdown-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 15px;
}

.breakdown-item {
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 15px;
  transition: var(--transition);
}

.breakdown-item:hover {
  background: rgba(59, 130, 246, 0.1);
  transform: translateY(-2px);
}

.breakdown-icon {
  width: 40px;
  height: 40px;
  background: rgba(59, 130, 246, 0.2);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--primary);
}

.breakdown-content {
  display: flex;
  flex-direction: column;
}

.breakdown-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--light);
}

.breakdown-label {
  font-size: 12px;
  color: var(--gray);
}

/* COUNTDOWN SECTION */
.countdown-section {
  padding: 25px;
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius);
}

.countdown-section h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  font-size: 1.1rem;
}

.countdown-timer {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 20px;
}

.countdown-item {
  text-align: center;
  background: rgba(255, 255, 255, 0.1);
  padding: 15px;
  border-radius: 12px;
  min-width: 70px;
}

.countdown-value {
  display: block;
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 5px;
}

.countdown-label {
  font-size: 12px;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.countdown-info {
  text-align: center;
  color: var(--gray);
  font-size: 14px;
}

.countdown-info span {
  color: var(--primary);
  font-weight: 600;
}

/* MILESTONES SECTION */
.milestones-section h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  font-size: 1.1rem;
}

.milestones-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.milestone {
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius);
  padding: 15px;
  display: flex;
  align-items: center;
  gap: 15px;
  transition: var(--transition);
}

.milestone:hover {
  background: rgba(59, 130, 246, 0.1);
}

.milestone-icon {
  width: 40px;
  height: 40px;
  background: rgba(59, 130, 246, 0.2);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--primary);
}

.milestone-content {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.milestone-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--light);
  margin-bottom: 4px;
}

.milestone-date {
  font-size: 12px;
  color: var(--gray);
}

.milestone-status {
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 5px;
}

.milestone-status.passed {
  background: rgba(16, 185, 129, 0.2);
  color: var(--success);
}

.milestone-status.upcoming {
  background: rgba(245, 158, 11, 0.2);
  color: var(--accent);
}

.milestone-status.future {
  background: rgba(59, 130, 246, 0.2);
  color: var(--primary);
}

/* ACTIONS SECTION */
.actions-section {
  padding-top: 20px;
  border-top: 1px solid var(--card-border);
}

.actions-section h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 15px;
  font-size: 1.1rem;
}

.action-buttons {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.action-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  color: var(--gray);
  padding: 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.action-btn:hover {
  background: rgba(59, 130, 246, 0.1);
  color: var(--primary);
  border-color: var(--primary);
  transform: translateY(-2px);
}

/* TIMELINE SECTION */
.timeline-section {
  max-width: 1200px;
  margin: 60px auto;
  padding: 0 20px;
}

.timeline-section .section-header {
  text-align: center;
  margin-bottom: 40px;
}

.timeline-section h2 {
  font-size: 2.5rem;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
}

.timeline-section p {
  color: var(--gray);
  font-size: 1.1rem;
}

.timeline-container {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 40px;
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
}

.timeline {
  position: relative;
  height: 80px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 40px;
  margin-bottom: 40px;
  overflow: hidden;
}

.timeline-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 40px;
  width: 0%;
  transition: width 1s ease;
}

.timeline-marks {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: space-between;
  padding: 0 20px;
  align-items: center;
}

.timeline-mark {
  position: relative;
  z-index: 2;
}

.mark-label {
  position: absolute;
  top: -25px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 12px;
  color: var(--gray);
  white-space: nowrap;
}

.timeline-current {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
  left: 0%;
  transition: left 1s ease;
}

.current-marker {
  width: 16px;
  height: 16px;
  background: white;
  border: 3px solid var(--primary);
  border-radius: 50%;
  position: relative;
}

.current-marker::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 24px;
  border: 2px solid var(--primary);
  border-radius: 50%;
  top: -8px;
  left: -8px;
  animation: pulse 2s infinite;
}

.current-label {
  position: absolute;
  top: -35px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: white;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.1); }
}

.timeline-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  text-align: center;
}

.timeline-stat {
  padding: 20px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius);
  transition: var(--transition);
}

.timeline-stat:hover {
  background: rgba(59, 130, 246, 0.1);
  transform: translateY(-5px);
}

.stat-value {
  display: block;
  font-size: 32px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 5px;
}

.stat-label {
  font-size: 14px;
  color: var(--gray);
}

/* FEATURES SECTION */
.features-section {
  max-width: 1200px;
  margin: 60px auto;
  padding: 0 20px;
  text-align: center;
}

.features-section h2 {
  font-size: 2.5rem;
  margin-bottom: 40px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 25px;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 30px;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-10px);
  border-color: var(--primary);
  box-shadow: var(--shadow);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 24px;
  color: var(--primary);
}

.feature-card h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--gray);
  font-size: 14px;
}

/* TOAST */
.toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--success);
  color: white;
  padding: 15px 25px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transform: translateY(100px);
  opacity: 0;
  transition: var(--transition);
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 10px;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast.error {
  background: var(--danger);
}

.toast.info {
  background: var(--primary);
}

/* FOOTER */
.footer {
  background: var(--dark-light);
  border-top: 1px solid var(--card-border);
  padding: 30px 0;
  margin-top: 60px;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  text-align: center;
}

.footer-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 15px;
}

.footer-logo i {
  font-size: 24px;
  color: var(--primary);
}

.footer-logo h3 {
  font-size: 20px;
  font-weight: 700;
}

.footer-logo span {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer > p {
  color: var(--gray);
  margin-bottom: 15px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--gray);
  text-decoration: none;
  transition: var(--transition);
}

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

/* RESPONSIVE */
@media (max-width: 768px) {
  .main-title {
    font-size: 2.5rem;
  }
  
  .subtitle {
    font-size: 1rem;
  }
  
  .calendar-animation {
    flex-direction: column;
    gap: 20px;
  }
  
  .arrow {
    transform: rotate(90deg);
  }
  
  .breakdown-grid {
    grid-template-columns: 1fr;
  }
  
  .countdown-timer {
    flex-wrap: wrap;
  }
  
  .action-buttons {
    grid-template-columns: 1fr;
  }
  
  .timeline-stats {
    grid-template-columns: 1fr;
  }
  
  .age-detail {
    gap: 15px;
  }
  
  .detail-value {
    font-size: 22px;
  }
}

@media (max-width: 480px) {
  .main-title {
    font-size: 2rem;
  }
  
  .age-number {
    font-size: 48px;
  }
  
  .age-detail {
    flex-direction: column;
    align-items: center;
  }
  
  .date-presets {
    flex-direction: column;
  }
  
  .preset-btn {
    min-width: auto;
  }
}