/* ========================
   Root Theme Variables
======================== */
:root {
  --accent: #00C2A8;
  --bg: #ffffff;
  --card-bg: #ffffff;
  --header-bg: linear-gradient(145deg, #00C2A8 0%, #00A28A 100%);
  --link: var(--accent);
  --link-hover: #008f77;
  --section-bg: #f9f9f9;
  --text: #222;
}

[data-theme='dark'] {
  --accent: #00C2A8;
  --bg: #121212;
  --card-bg: #1f1f1f;
  --header-bg: linear-gradient(145deg, #003c37 0%, #00564b 100%);
  --link: #3de8ca;
  --link-hover: #76fff0;
  --section-bg: #1a1a1a;
  --text: #f0f0f0;
}

/* ========================
   Base Styles
======================== */
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Poppins', 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  transition: background 0.3s, color 0.3s;
}

a {
  color: var(--link);
  text-decoration: none;
  transition: color 0.3s;
}
a:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

h2, h3 {
  color: var(--accent);
}

ul {
  padding-left: 20px;
  margin: 10px 0 20px;
}
ul li {
  margin-bottom: 10px;
}
ul li::before {
  content: "✔";
  color: var(--accent);
  margin-right: 8px;
}

/* ========================
   Navigation
======================== */
.topnav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--header-bg);
  color: white;
  padding: 12px 24px;
  position: sticky;
  top: 0;
  z-index: 999;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo.small-logo {
  height: 40px;
}
.home-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  position: relative;
}
.ping-effect-gif {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translate(-30%, -50%);
  height: 60px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.home-link:hover .ping-effect-gif {
  opacity: 1;
}

.app-name {
  font-size: 1.3rem;
  font-weight: bold;
  color: white;
  animation: ping-effect 2.8s infinite ease-in-out;
  transition: transform 0.3s ease, text-shadow 0.3s ease;
}
[data-theme='dark'] .app-name {
  color: var(--link);
}

.nav-right {
  display: flex;
  gap: 16px;
  align-items: center;
}
.nav-right a {
  color: white;
  font-weight: 500;
}
.nav-right a:hover {
  text-decoration: underline;
}
.nav-right .theme-toggle {
  background: #FFE066;
  border: none;
  border-radius: 20px;
  padding: 6px 12px;
  font-weight: bold;
  cursor: pointer;
}

/* ========================
   Hero & CTA
======================== */
header.hero {
  background: var(--header-bg);
  color: #fff;
  text-align: center;
  padding: 40px 20px 30px;
}
.logo.large-logo {
  height: 140px;
  margin-bottom: 10px;
}
.tagline {
  font-size: 1.2rem;
  margin: 10px 0 20px;
}
.cta-button {
  background: #FFE066;
  color: #000;
  padding: 12px 24px;
  border-radius: 30px;
  font-weight: bold;
  display: inline-block;
}

/* ========================
   Features & Preview
======================== */
.features {
  display: flex;
  flex-direction: column;
  gap: 30px;
  padding: 40px 20px;
  max-width: 900px;
  margin: auto;
}
.feature h2 {
  margin-bottom: 10px;
  font-size: 1.4rem;
  color: var(--accent);
}
.preview {
  text-align: center;
  background: var(--section-bg);
  padding: 40px 20px;
}
.mockup {
  max-width: 300px;
  border-radius: 20px;
  background: var(--card-bg);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  margin-top: 20px;
}

/* ========================
   Footer
======================== */
footer {
  background: var(--section-bg);
  text-align: center;
  padding: 20px;
  font-size: 0.9em;
}
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}
.footer-nav a {
  font-weight: 500;
}

/* ========================
   Main Content
======================== */
main.content {
  padding: 40px 20px;
  max-width: 800px;
  margin: auto;
}
section {
  margin-bottom: 40px;
}

/* ========================
   Contact Form
======================== */
form {
  background: var(--card-bg);
  border: 1px solid #ddd;
  border-radius: 12px;
  padding: 30px 20px;
  max-width: 550px;
  margin: 30px auto;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}
form label {
  color: var(--text);
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
}
form input[type="text"],
form input[type="email"],
form textarea,
form select {
  width: 90%;
  padding: 12px;
  border-radius: 8px;
  border: 1px solid #ccc;
  background-color: #f9f9f9;
  font-size: 1rem;
  color: var(--text);
  transition: border 0.3s;
  appearance: none;
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px 16px;
}

form select {
  background-image: url("data:image/svg+xml,%3Csvg fill='%23000' height='24' viewBox='0 0 24 24' width='24' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
}
[data-theme="dark"] form input,
[data-theme="dark"] form textarea,
[data-theme="dark"] form select {
  background-color: #1e1e1e;
  border: 1px solid #444;
  color: var(--text);
}
[data-theme="dark"] form select {
  background-image: url("data:image/svg+xml,%3Csvg fill='%23f0f0f0' height='24' viewBox='0 0 24 24' width='24' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
}

form input:focus,
form textarea:focus,
form select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(0, 194, 168, 0.2);
}
form textarea {
  resize: vertical;
  min-height: 100px;
}
form button[type="submit"] {
  background: #FFE066;
  color: #000;
  padding: 12px 24px;
  font-weight: bold;
  border: none;
  border-radius: 30px;
  cursor: pointer;
  width: fit-content;
  margin: 20px auto 10px auto;
  text-align: center;
  display: block;
  transition: background 0.3s ease;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}
form button[type="submit"]:hover {
  background: #ffd633;
}
form small {
  display: block;
  text-align: center;
  margin-top: 12px;
  color: #777;
  font-size: 0.9rem;
}

/* ========================
   Animation: Ping Effect
======================== */
@keyframes ping-effect {
  0% {
    text-shadow: 0 0 0px var(--accent);
    transform: scale(1);
  }
  50% {
    text-shadow: 0 0 8px var(--accent), 0 0 15px var(--accent);
    transform: scale(1.05);
  }
  100% {
    text-shadow: 0 0 0px var(--accent);
    transform: scale(1);
  }
}

/* ========================
   Legal / Support Styling
======================== */
.legal-support {
  background: var(--section-bg);
  padding: 40px 20px;
  border-top: 1px solid #ccc;
  margin-top: 40px;
  animation: fadeInUp 0.6s ease-in-out;
}
.legal-support h3 {
  font-size: 1.4rem;
  color: var(--accent);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.legal-support p {
  font-size: 1rem;
  color: var(--text);
  margin-bottom: 12px;
  line-height: 1.6;
}
.legal-support a {
  color: var(--link);
  font-weight: 500;
}
.legal-support a:hover {
  color: var(--link-hover);
  text-decoration: underline;
}
.legal-support .icon {
  font-size: 1.4rem;
}
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========================
   Mobile Responsiveness
======================== */
@media (max-width: 768px) {
  .topnav {
    flex-direction: column;
    align-items: flex-start;
    padding: 16px;
  }
  .nav-left {
    width: 100%;
    justify-content: space-between;
  }
  .nav-right {
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 12px;
    margin-top: 10px;
  }
  .app-name {
    font-size: 1.1rem;
  }
  .logo.small-logo {
    height: 32px;
  }
  .ping-effect-gif {
    height: 40px;
    transform: translate(-20%, -50%);
  }
  header.hero {
    padding: 30px 16px 24px;
  }
  .logo.large-logo {
    height: 100px;
  }
  .tagline {
    font-size: 1rem;
  }
  .cta-button {
    font-size: 1rem;
    padding: 10px 20px;
  }
  .features,
  .preview,
  main.content {
    padding: 20px 16px;
  }
  .mockup {
    max-width: 100%;
    height: auto;
    margin-top: 20px;
  }
  form {
    padding: 24px 16px;
    margin: 20px auto;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
  }
  form input[type="text"],
  form input[type="email"],
  form textarea,
  form select {
    width: 100%;
  }
  form button[type="submit"] {
    width: 100%;
    font-size: 1rem;
    padding: 12px;
  }
  .legal-support {
    padding: 24px 16px;
  }
  .footer-nav {
    flex-direction: column;
    gap: 6px;
  }
  footer {
    padding: 16px;
    font-size: 0.85em;
  }
}

