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

:root {
  --primary-color: #6366f1;
  --secondary-color: #8b5cf6;
  --accent-color: #f59e0b;
  --text-color: #1f2937;
  --light-bg: #f9fafb;
  --white: #ffffff;
  --gradient: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  --shadow:
    0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --border-radius: 12px;
}

body {
  font-family: "Poppins", sans-serif;
  color: var(--text-color);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navbar Styles */
.navbar {
  background: var(--white);
  box-shadow: var(--shadow-sm);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  animation: slideDown 0.5s ease;
}

@keyframes slideDown {
  from {
    transform: translateY(-100%);
  }
  to {
    transform: translateY(0);
  }
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.logo i {
  font-size: 2rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-color);
  margin-left: 2rem;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

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

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient);
  transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* Hero Section */
.hero {
  padding: 120px 20px 80px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.1" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,154.7C960,171,1056,181,1152,165.3C1248,149,1344,107,1392,85.3L1440,64L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>');
  background-repeat: no-repeat;
  background-position: bottom;
  background-size: cover;
  opacity: 0.1;
  animation: wave 10s linear infinite;
}

@keyframes wave {
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: 100% 0;
  }
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  color: var(--white);
}

.hero-content h1 {
  font-size: 3rem;
  line-height: 1.2;
  margin-bottom: 1rem;
  animation: fadeInUp 1s ease;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.highlight {
  background: linear-gradient(135deg, #f6d365 0%, #fda085 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  opacity: 0.9;
  animation: fadeInUp 1s ease 0.2s both;
}

.hero-image {
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

/* Upload Section */
.upload-section {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius);
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  animation: fadeInUp 1s ease 0.4s both;
}

.file-upload-area {
  border: 2px dashed rgba(255, 255, 255, 0.3);
  border-radius: var(--border-radius);
  padding: 40px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-bottom: 20px;
}

.file-upload-area:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.05);
  transform: scale(1.02);
}

.file-upload-area i {
  font-size: 3rem;
  color: var(--white);
  margin-bottom: 1rem;
  animation: bounce 2s ease infinite;
}

@keyframes bounce {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.file-upload-area h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--white);
}

.file-info {
  font-size: 0.9rem;
  opacity: 0.8;
  margin-top: 1rem;
}

/* Button Styles */
.btn {
  padding: 12px 30px;
  border: none;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition:
    width 0.6s,
    height 0.6s;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: var(--gradient);
  color: var(--white);
  box-shadow: var(--shadow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--white);
  color: var(--white);
}

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

/* Selected File */
.selected-file {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50px;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.selected-file i {
  color: var(--white);
}

.selected-file span {
  flex: 1;
  color: var(--white);
}

.btn-remove {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: var(--white);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.btn-remove:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: rotate(90deg);
}

/* Spinner Styles */
.spinner {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.spinner-circle {
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--white);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Features Section */
.features {
  padding: 80px 0;
  background: var(--light-bg);
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 3rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeIn 1s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.feature-card {
  background: var(--white);
  padding: 30px;
  border-radius: var(--border-radius);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  animation: fadeInUp 1s ease;
  animation-fill-mode: both;
}

.feature-card:nth-child(1) {
  animation-delay: 0.2s;
}

.feature-card:nth-child(2) {
  animation-delay: 0.4s;
}

.feature-card:nth-child(3) {
  animation-delay: 0.6s;
}

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

.feature-icon {
  width: 80px;
  height: 80px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  animation: pulse 2s ease infinite;
}

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

.feature-icon i {
  font-size: 2rem;
  color: var(--white);
}

.feature-card h3 {
  font-size: 1.3rem;
  margin-bottom: 10px;
  color: var(--text-color);
}

/* How It Works */
.how-it-works {
  padding: 80px 0;
  background: var(--white);
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  position: relative;
}

.step {
  text-align: center;
  position: relative;
  animation: fadeInUp 1s ease;
  animation-fill-mode: both;
}

.step:nth-child(1) {
  animation-delay: 0.2s;
}

.step:nth-child(2) {
  animation-delay: 0.4s;
}

.step:nth-child(3) {
  animation-delay: 0.6s;
}

.step::after {
  content: "";
  position: absolute;
  top: 50px;
  right: -50%;
  width: 100%;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--primary-color),
    var(--secondary-color)
  );
  opacity: 0.3;
  display: none;
}

.step:last-child::after {
  display: none;
}

.step-number {
  width: 50px;
  height: 50px;
  background: var(--gradient);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: bold;
  margin: 0 auto 20px;
  animation: rotate 10s linear infinite;
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.step i {
  font-size: 3rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.step h3 {
  font-size: 1.3rem;
  margin-bottom: 10px;
}

/* Donation Section */
.donation-section {
  padding: 80px 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.donation-section::before {
  content: "❤️";
  position: absolute;
  font-size: 200px;
  opacity: 0.1;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: heartbeat 1.5s ease infinite;
}

@keyframes heartbeat {
  0%,
  100% {
    transform: translate(-50%, -50%) scale(1);
  }
  50% {
    transform: translate(-50%, -50%) scale(1.2);
  }
}

.donation-content {
  text-align: center;
  position: relative;
  z-index: 1;
}

.donation-content h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  animation: fadeInDown 1s ease;
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.donation-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin: 40px 0;
}

.donation-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: 30px;
  border-radius: var(--border-radius);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.3s ease;
  position: relative;
  animation: fadeInUp 1s ease;
  animation-fill-mode: both;
}

.donation-card:nth-child(1) {
  animation-delay: 0.2s;
}

.donation-card:nth-child(2) {
  animation-delay: 0.4s;
}

.donation-card:nth-child(3) {
  animation-delay: 0.6s;
}

.donation-card:hover {
  transform: translateY(-10px) scale(105%);
  background: rgba(255, 255, 255, 0.2);
}

.donation-card.popular {
  transform: scale(105%);
  border: 2px solid var(--accent-color);
  box-shadow: var(--shadow);
}

.popular-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-color);
  color: var(--white);
  padding: 5px 15px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  animation: bounce 2s ease infinite;
}

.donation-card i {
  font-size: 3rem;
  margin-bottom: 1rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.btn-donate {
  background: var(--white);
  color: var(--primary-color);
  margin-top: 20px;
  width: 100%;
}

.btn-donate-outline {
  background: transparent;
  border: 2px solid var(--white);
  color: var(--white);
}

.custom-donation {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-top: 30px;
}

.custom-donation input {
  padding: 12px 20px;
  border: none;
  border-radius: 50px;
  width: 200px;
  font-size: 1rem;
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.custom-donation input::placeholder {
  color: rgba(255, 255, 255, 0.7);
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(5px);
  z-index: 2000;
  animation: fadeIn 0.3s ease;
}

.modal-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--white);
  padding: 40px;
  border-radius: var(--border-radius);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translate(-50%, -60%);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%);
  }
}

.close {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-color);
  transition: all 0.3s ease;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.close:hover {
  background: rgba(0, 0, 0, 0.1);
  transform: rotate(90deg);
}

.payment-methods {
  display: grid;
  gap: 10px;
  margin: 20px 0;
}

.payment-method {
  padding: 15px;
  border: 2px solid #e5e7eb;
  border-radius: 10px;
  background: var(--white);
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.payment-method:hover {
  border-color: var(--primary-color);
  transform: translateX(5px);
}

.btn-full {
  width: 100%;
}

/* Footer */
.footer {
  background: var(--text-color);
  color: var(--white);
  padding: 20px 0;
  text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero-container {
    grid-template-columns: 1fr;
  }

  .hero-content h1 {
    font-size: 2rem;
  }

  .nav-links {
    display: none;
  }

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

  .step::after {
    display: none;
  }

  .custom-donation {
    flex-direction: column;
    align-items: center;
  }

  .donation-cards {
    grid-template-columns: 1fr;
  }

  .donation-card.popular {
    transform: scale(100%);
  }
}

/* Loading Animation */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(5px);
  z-index: 3000;
  display: none;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  animation: fadeIn 0.3s ease;
}

.loading-spinner {
  width: 80px;
  height: 80px;
  border: 5px solid #f3f3f3;
  border-top: 5px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.loading-text {
  margin-top: 20px;
  font-size: 1.2rem;
  color: var(--text-color);
  font-weight: 600;
}