:root {
  --green-900: #0f2417;
  --green-700: #1b5e3c;
  --green-500: #2e9e5b;
  --green-300: #7bd39a;
  --accent: #e6b800;
  --bg: #f2f7f3;
  --card-bg: #ffffff;
  --text: #14261c;
  --muted: #5c6f63;
  --shadow: 0 8px 24px rgba(15, 36, 23, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top right, var(--green-300) 0%, transparent 40%),
    var(--bg);
  min-height: 100vh;
  line-height: 1.6;
}

/* ---------- Header ---------- */
.site-header {
  text-align: center;
  padding: 3rem 1rem 2rem;
  background: linear-gradient(135deg, var(--green-700), var(--green-900));
  color: #fff;
}

.logo {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.tagline {
  margin: 0.5rem 0 0;
  color: var(--green-300);
  font-size: 1.05rem;
}

/* ---------- Layout ---------- */
main {
  max-width: 640px;
  margin: -1.5rem auto 0;
  padding: 0 1rem 3rem;
  display: grid;
  gap: 1.5rem;
}

.card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: var(--shadow);
}

.card h1,
.card h2 {
  margin-top: 0;
  color: var(--green-700);
}

.card p {
  color: var(--muted);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  border: none;
  border-radius: 10px;
  padding: 0.85rem 1.6rem;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.08s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--green-500);
  color: #fff;
}

.btn-primary:hover {
  background: var(--green-700);
}

.btn-secondary {
  background: var(--accent);
  color: var(--green-900);
}

.btn-secondary:hover {
  background: #cca300;
}

/* ---------- Strike animation ---------- */
.strike-section {
  text-align: center;
  position: relative;
  overflow: hidden;
}

.strike-word {
  min-height: 3.5rem;
  margin-top: 1.25rem;
  font-size: 2.6rem;
  font-weight: 900;
  color: #c0392b;
  letter-spacing: 2px;
  text-transform: uppercase;
  opacity: 0;
}

.strike-word.animate {
  animation: strike-pop 0.7s cubic-bezier(0.2, 1.4, 0.4, 1) forwards;
}

@keyframes strike-pop {
  0% {
    opacity: 0;
    transform: scale(0.2) rotate(-12deg);
  }
  40% {
    opacity: 1;
    transform: scale(1.25) rotate(4deg);
  }
  70% {
    transform: scale(0.95) rotate(-2deg);
  }
  100% {
    opacity: 1;
    transform: scale(1) rotate(0deg);
  }
}

/* ---------- Form ---------- */
.field {
  margin-bottom: 1.1rem;
}

.field label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--text);
}

.field input,
.field select {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border: 1.5px solid #d5e2da;
  border-radius: 8px;
  font-size: 1rem;
  background: #fbfdfb;
  transition: border-color 0.15s ease;
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--green-500);
}

.field input.invalid,
.field select.invalid {
  border-color: #c0392b;
  background: #fdf2f1;
}

/* ---------- Footer ---------- */
.site-footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--muted);
  font-size: 0.92rem;
}