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

body {
  font-family: 'Inter', sans-serif;
  background-color: #f9fafb;
  color: #020617;
  line-height: 1.5;
}

/* Refined Color System */
:root {
  --primary: #6366f1;
  --primary-light: #a5b4fc;
  --gradient-start: #7c3aed;
  --gradient-end: #22d3ee;
  --bg-light: #f9fafb;
  --text-dark: #020617;
  --text-soft: #475569;
  --card-shadow: 0 18px 28px -12px rgba(99, 102, 241, 0.18);
  --footer-bg: #020617;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header */
header {
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  position: sticky;
  top: 0;
  margin: 1rem 2rem;
  z-index: 1000;
  border-radius: 1rem;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.logo {
  font-weight: 700;
  font-size: 1.8rem;
  background: linear-gradient(130deg, var(--primary), #3b82f6);
  -webkit-background-clip: text;
  color: transparent;
}

/* Navigation */
nav ul {
  list-style: none;
  display: flex;
  gap: 2.5rem;
}

nav ul li {
  position: relative;
}

nav ul li a {
  text-decoration: none;
  font-weight: 600;
  color: var(--text-dark);
  padding: 0.5rem 0;
  transition: 0.2s;
}

nav ul li a:hover, nav ul li a.active {
  color: var(--primary);
}

nav ul li a.active {
  border-bottom: 2px solid var(--primary);
}

/* Dropdown */
.dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: -0.75rem;
  background: white;
  box-shadow: 0 15px 25px -5px rgba(0,0,0,0.1);
  border-radius: 20px;
  padding: 0.9rem 0;
  min-width: 190px;
  border: 1px solid rgba(99,102,241,0.15);
}

.dropdown li a {
  display: block;
  padding: 0.6rem 1.8rem;
  font-weight: 500;
  color: var(--text-soft);
}

.dropdown li a:hover {
  background: #f1f5f9;
  color: var(--primary);
}

nav li:hover .dropdown {
  display: block;
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-dark);
}

/* Hero */
#hero {
  height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-image:
    url('https://images.pexels.com/photos/3184418/pexels-photo-3184418.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=2'),
    linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  background-blend-mode: overlay;
  background-size: cover;
  background-position: center;
  color: white;
  text-align: center;
  padding: 2rem;
}

#hero h1 {
  font-size: clamp(2.5rem, 8vw, 4.2rem);
  font-weight: 800;
  text-shadow: 0 4px 12px rgba(0,0,0,0.25);
}

#hero p {
  font-size: 1.3rem;
  margin: 1.5rem 0 2rem;
}

/* Updated Button */
.btn {
  background: linear-gradient(135deg, #ffffff, #f1f5f9);
  color: var(--primary);
  padding: 14px 38px;
  border-radius: 50px;
  font-weight: 700;
  text-decoration: none;
  font-size: 1.15rem;
  box-shadow: 0 12px 24px -8px rgba(0,0,0,0.25);
  transition: all 0.25s ease;
  border: 2px solid rgba(255,255,255,0.4);
  display: inline-block;
  cursor: pointer;
  border: none;
}

.btn:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 22px 35px -10px rgba(0,0,0,0.35);
  background: white;
}

.btn-small {
  padding: 10px 24px;
  font-size: 1rem;
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
  box-shadow: none;
}

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

/* Features */
#features {
  padding: 5rem 0;
  background: var(--bg-light);
}

#features h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 3rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: white;
  padding: 2rem 1.5rem;
  border-radius: 32px;
  box-shadow: var(--card-shadow);
  transition: 0.3s ease;
  text-align: center;
  border: 1px solid rgba(99,102,241,0.12);
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 28px 38px -14px rgba(99,102,241,0.35);
}

.feature-card i {
  font-size: 3rem;
  background: linear-gradient(145deg, #4facfe, #3b82f6);
  -webkit-background-clip: text;
  color: transparent;
  margin-bottom: 1.3rem;
}

/* Page Header */
.page-header {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: white;
  padding: 4rem 0;
  text-align: center;
}

.page-header h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.page-header p {
  font-size: 1.2rem;
  opacity: 0.9;
}

/* About Page */
.about-section {
  padding: 5rem 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-content h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--text-dark);
}

.about-content p {
  color: var(--text-soft);
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

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

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary);
  display: block;
}

.stat-label {
  color: var(--text-soft);
  font-size: 0.9rem;
}

.about-image img {
  width: 100%;
  border-radius: 32px;
  box-shadow: var(--card-shadow);
}

/* Team Section */
.team-section {
  padding: 5rem 0;
  background: var(--bg-light);
}

.team-section h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 3rem;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.team-card {
  background: white;
  border-radius: 32px;
  padding: 2rem;
  text-align: center;
  box-shadow: var(--card-shadow);
  transition: 0.3s ease;
}

.team-card:hover {
  transform: translateY(-10px);
}

.team-card img {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  margin-bottom: 1.5rem;
  object-fit: cover;
}

.team-card h3 {
  margin-bottom: 0.5rem;
  color: var(--text-dark);
}

.team-card p {
  color: var(--primary);
  font-weight: 500;
  margin-bottom: 1rem;
}

.team-social {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

.team-social a {
  color: var(--text-soft);
  transition: 0.2s;
}

.team-social a:hover {
  color: var(--primary);
}

/* Contact Page */
.contact-section {
  padding: 5rem 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.contact-info {
  background: white;
  padding: 3rem;
  border-radius: 32px;
  box-shadow: var(--card-shadow);
}

.contact-info h2 {
  font-size: 2rem;
  margin-bottom: 2rem;
  color: var(--text-dark);
}

.contact-details {
  margin: 2rem 0;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.contact-item i {
  font-size: 1.5rem;
  color: var(--primary);
  width: 40px;
}

.contact-item p {
  color: var(--text-soft);
}

.social-links {
  display: flex;
  gap: 1.5rem;
  margin-top: 2rem;
}

.social-links a {
  width: 45px;
  height: 45px;
  background: var(--bg-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.2rem;
  transition: 0.3s ease;
}

.social-links a:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-5px);
}

/* Contact Form */
.contact-form {
  background: white;
  padding: 3rem;
  border-radius: 32px;
  box-shadow: var(--card-shadow);
}

.contact-form h2 {
  font-size: 2rem;
  margin-bottom: 2rem;
  color: var(--text-dark);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem 1.2rem;
  border: 2px solid #e2e8f0;
  border-radius: 16px;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  transition: 0.3s ease;
  background: var(--bg-light);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.1);
}

.form-group input.error,
.form-group textarea.error {
  border-color: var(--danger);
}

/* Success Message */
.success-message {
  background: var(--success);
  color: white;
  padding: 1rem;
  border-radius: 16px;
  margin-bottom: 1.5rem;
  display: none;
}

.success-message.show {
  display: block;
}

/* Submissions Page */
.submissions-section {
  padding: 5rem 0;
  min-height: 60vh;
}

.submissions-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 3rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.submissions-header h2 {
  font-size: 2rem;
  color: var(--text-dark);
}

.submissions-stats {
  background: white;
  padding: 1rem 2rem;
  border-radius: 50px;
  box-shadow: var(--card-shadow);
  font-weight: 600;
  color: var(--primary);
}

.submissions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
}

.submission-card {
  background: white;
  border-radius: 24px;
  padding: 1.5rem;
  box-shadow: var(--card-shadow);
  transition: 0.3s ease;
  border: 1px solid rgba(99,102,241,0.1);
  position: relative;
}

.submission-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 25px 35px -12px rgba(99,102,241,0.25);
}

.submission-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid #f1f5f9;
}

.submission-avatar {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 1.2rem;
}

.submission-info h3 {
  font-size: 1.2rem;
  margin-bottom: 0.3rem;
  color: var(--text-dark);
}

.submission-info p {
  color: var(--primary);
  font-size: 0.9rem;
  word-break: break-all;
}

.submission-message {
  color: var(--text-soft);
  line-height: 1.6;
  margin: 1rem 0;
  padding: 1rem;
  background: var(--bg-light);
  border-radius: 16px;
  font-style: italic;
}

.submission-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1rem;
  font-size: 0.85rem;
  color: #94a3b8;
}

.delete-btn {
  background: none;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: 1.1rem;
  transition: 0.2s;
  padding: 5px 10px;
  border-radius: 8px;
}

.delete-btn:hover {
  background: #fee2e2;
  transform: scale(1.1);
}

.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  background: white;
  border-radius: 32px;
  box-shadow: var(--card-shadow);
}

.empty-state i {
  font-size: 5rem;
  color: #cbd5e1;
  margin-bottom: 1.5rem;
}

.empty-state h3 {
  font-size: 1.8rem;
  color: var(--text-dark);
  margin-bottom: 1rem;
}

.empty-state p {
  color: var(--text-soft);
  margin-bottom: 2rem;
}

/* Clear All Button */
.clear-all-btn {
  background: var(--danger);
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  transition: 0.3s;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.clear-all-btn:hover {
  background: #dc2626;
  transform: translateY(-2px);
  box-shadow: 0 10px 20px -5px rgba(239, 68, 68, 0.3);
}

/* Footer */
footer {
  background: var(--footer-bg);
  color: #cbd5e1;
  padding: 2.5rem 0;
  text-align: center;
}

.footer-links {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
}

.footer-links a {
  color: #e2e8f0;
  text-decoration: none;
  transition: 0.2s;
}

.footer-links a:hover {
  color: #38bdf8;
}

hr {
  width: 80px;
  border: 1px solid #334155;
  margin: 1rem auto;
}

/* Responsive Design */
@media (max-width: 768px) {
  header {
    margin: 0.5rem 1rem;
  }

  .navbar {
    padding: 1rem;
  }

  .mobile-menu-btn {
    display: block;
  }

  nav ul {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 2rem;
    border-radius: 0 0 1rem 1rem;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    gap: 1rem;
    text-align: center;
  }

  nav ul.show {
    display: flex;
  }

  .dropdown {
    position: static;
    box-shadow: none;
    padding: 1rem 0;
    display: none;
  }

  nav li:hover .dropdown {
    display: none;
  }

  nav li.active .dropdown {
    display: block;
  }

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about-stats {
    grid-template-columns: 1fr;
  }

  .page-header h1 {
    font-size: 2.5rem;
  }

  .contact-info,
  .contact-form {
    padding: 2rem;
  }

  .submissions-header {
    flex-direction: column;
    text-align: center;
  }

  .submissions-grid {
    grid-template-columns: 1fr;
  }
}

/* ========== TASK 4 - DASHBOARD STYLES ========== */

/* Dashboard Layout */
.dashboard-section {
  padding: 3rem 0;
  min-height: 70vh;
}

.dashboard-container {
  max-width: 800px;
  margin: 0 auto;
  background: white;
  border-radius: 32px;
  box-shadow: var(--card-shadow);
  padding: 2.5rem;
}

.dashboard-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.dashboard-header h1 {
  font-size: 2.5rem;
  color: var(--text-dark);
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  color: transparent;
  display: inline-block;
}

.dashboard-header p {
  color: var(--text-soft);
  font-size: 1.1rem;
}

/* Task Stats */
.task-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.stat-card {
  background: var(--bg-light);
  padding: 1.5rem;
  border-radius: 24px;
  text-align: center;
  transition: 0.3s ease;
  border: 1px solid rgba(99,102,241,0.1);
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 25px -8px rgba(99,102,241,0.2);
}

.stat-card i {
  font-size: 2rem;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.stat-card .stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-dark);
  display: block;
}

.stat-card .stat-label {
  color: var(--text-soft);
  font-size: 0.9rem;
}

/* Add Task Section */
.add-task-section {
  background: var(--bg-light);
  padding: 2rem;
  border-radius: 24px;
  margin-bottom: 2rem;
}

.add-task-section h3 {
  margin-bottom: 1.5rem;
  color: var(--text-dark);
  font-size: 1.3rem;
}

.task-input-group {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
}

.task-input-group input {
  flex: 1;
  padding: 1rem 1.2rem;
  border: 2px solid #e2e8f0;
  border-radius: 16px;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  transition: 0.3s ease;
}

.task-input-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.1);
}

.task-input-group input.error {
  border-color: var(--danger);
}

/* Search & Filter Section */
.search-filter-section {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.search-box {
  flex: 2;
  position: relative;
  min-width: 250px;
}

.search-box i {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: #94a3b8;
}

.search-box input {
  width: 100%;
  padding: 1rem 1rem 1rem 3rem;
  border: 2px solid #e2e8f0;
  border-radius: 16px;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  transition: 0.3s ease;
}

.search-box input:focus {
  outline: none;
  border-color: var(--primary);
}

.filter-box {
  flex: 1;
  min-width: 150px;
}

.filter-box select {
  width: 100%;
  padding: 1rem 1.2rem;
  border: 2px solid #e2e8f0;
  border-radius: 16px;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  background: white;
  cursor: pointer;
  transition: 0.3s ease;
}

.filter-box select:focus {
  outline: none;
  border-color: var(--primary);
}

/* Tasks List */
.tasks-container {
  background: var(--bg-light);
  border-radius: 24px;
  padding: 1.5rem;
}

.tasks-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid #e2e8f0;
}

.tasks-header h3 {
  font-size: 1.3rem;
  color: var(--text-dark);
}

.task-count {
  background: var(--primary);
  color: white;
  padding: 0.3rem 1rem;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
}

.task-list {
  list-style: none;
}

.task-item {
  background: white;
  padding: 1.2rem 1.5rem;
  border-radius: 16px;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: 0.3s ease;
  border: 1px solid rgba(99,102,241,0.1);
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.task-item:hover {
  transform: translateX(5px);
  box-shadow: 0 10px 20px -8px rgba(99,102,241,0.15);
  border-color: var(--primary-light);
}

.task-item.completed {
  background: #f8fafc;
  opacity: 0.8;
}

.task-item.completed .task-name {
  text-decoration: line-through;
  color: #94a3b8;
}

.task-content {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 1;
}

.task-checkbox {
  width: 22px;
  height: 22px;
  cursor: pointer;
  accent-color: var(--primary);
}

.task-name {
  font-size: 1.1rem;
  color: var(--text-dark);
  word-break: break-word;
}

.task-actions {
  display: flex;
  gap: 0.5rem;
}

.task-btn {
  background: none;
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  cursor: pointer;
  transition: 0.2s ease;
  color: var(--text-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.task-btn:hover {
  background: var(--bg-light);
  transform: scale(1.1);
}

.task-btn.edit-btn:hover {
  color: var(--primary);
  background: rgba(99,102,241,0.1);
}

.task-btn.delete-btn:hover {
  color: var(--danger);
  background: #fee2e2;
}

.task-btn.save-btn {
  color: var(--success);
  background: rgba(16,185,129,0.1);
}

.task-btn.cancel-btn {
  color: var(--danger);
  background: #fee2e2;
}

/* Edit Mode */
.task-item.editing .task-name {
  display: none;
}

.edit-input {
  flex: 1;
  padding: 0.5rem 1rem;
  border: 2px solid var(--primary);
  border-radius: 12px;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  margin-right: 1rem;
}

.edit-input:focus {
  outline: none;
}

/* Empty State */
.empty-state-small {
  text-align: center;
  padding: 3rem 1rem;
  color: #94a3b8;
}

.empty-state-small i {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: #cbd5e1;
}

.empty-state-small p {
  font-size: 1.1rem;
}

/* Clear All Button */
.clear-all-tasks {
  display: flex;
  justify-content: flex-end;
  margin-top: 1.5rem;
}

.btn-danger {
  background: var(--danger);
  color: white;
  border: none;
  padding: 10px 24px;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  transition: 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-danger:hover {
  background: #dc2626;
  transform: translateY(-2px);
  box-shadow: 0 10px 20px -5px rgba(239, 68, 68, 0.3);
}

.btn-danger:disabled {
  background: #cbd5e1;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Responsive Dashboard */
@media (max-width: 768px) {
  .dashboard-container {
    padding: 1.5rem;
    margin: 0 1rem;
  }

  .dashboard-header h1 {
    font-size: 2rem;
  }

  .task-stats {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .task-input-group {
    flex-direction: column;
  }

  .search-filter-section {
    flex-direction: column;
  }

  .task-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .task-content {
    width: 100%;
  }

  .task-actions {
    width: 100%;
    justify-content: flex-end;
  }

  .task-item.editing .task-content {
    flex-direction: column;
  }

  .edit-input {
    width: 100%;
    margin-right: 0;
  }
}