@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&display=swap');

:root {
  --font-family: 'Poppins', sans-serif;
}

body {
  margin: 0;
  font-family: var(--font-family);
}

/* index.html */
body[data-page="index"] {
  background: linear-gradient(135deg, #feda75, #fa7e1e, #d62976, #962fbf, #4f5bd5);
  background-size: 400% 400%;
  animation: gradientBG 8s ease infinite;
  color: white;
  text-align: center;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100dvh;
  overflow: hidden;
}

@media screen and (max-width: 1024px) {
  body[data-page="index"] {
    height: 50vh;
  }
}

@keyframes gradientBG {
  0% {background-position: 0% 50%;}
  50% {background-position: 100% 50%;}
  100% {background-position: 0% 50%;}
}

body[data-page="index"] .math-bg span {
  position: absolute;
  color: rgba(255, 255, 255, 0.3);
  font-size: 2em;
  animation: float 12s linear infinite;
  user-select: none;
  pointer-events: none;
}

@keyframes float {
  0% {transform: translateY(100dvh) rotate(0deg); opacity: 0;}
  20% {opacity: 1;}
  100% {transform: translateY(-10vh) rotate(360deg); opacity: 0;}
}

body[data-page="index"] .container {
  position: relative;
  background: linear-gradient(145deg, #7b2ff7, #b896ff);
  border-radius: 25px;
  border: 8px double #000080;
  padding: 50px 60px;
  width: min(650px, 90vw);
  height: 320px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  box-shadow: 0 0 40px rgba(255, 255, 255, 0.2);
  overflow: hidden;
}

body[data-page="index"] h1 {
  font-size: 3em;
  text-shadow: 0 0 20px rgba(255,255,255,0.8);
  margin-bottom: 20px;
}

body[data-page="index"] .typing-container {
  text-align: center;
  height: 80px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  margin-bottom: 30px;
}

body[data-page="index"] .typing-line {
  font-size: 1.3em;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  border-right: 3px solid white;
  margin: 5px 0;
  animation: blink 1s infinite step-end;
}

@keyframes blink {
  0%, 100% { border-color: transparent; }
  50% { border-color: white; }
}

body[data-page="index"] .btn-group {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin-top: 10px;
  flex-wrap: wrap;
}

body[data-page="index"] a {
  text-decoration: none;
  padding: 12px 25px;
  border-radius: 30px;
  color: white;
  font-weight: 600;
  transition: transform 0.3s, box-shadow 0.3s;
}

body[data-page="index"] .login { background: linear-gradient(45deg, #ff512f, #dd2476); }
body[data-page="index"] .signup { background: linear-gradient(45deg, #1e9600, #fff200, #ff0000); }
body[data-page="index"] .plans { background: linear-gradient(45deg, #00c6ff, #0072ff); }

body[data-page="index"] a:hover {
  transform: scale(1.08);
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.6);
}

body[data-page="index"] .glow-avatar {
  height: 40px;
  animation: float-glow 3s ease-in-out infinite;
  filter: drop-shadow(0 0 6px #aa00ff);
}

@keyframes float-glow {
  0% { transform: translateY(0px); filter: drop-shadow(0 0 6px #aa00ff); }
  50% { transform: translateY(-8px); filter: drop-shadow(0 0 14px #ff00ff); }
  100% { transform: translateY(0px); filter: drop-shadow(0 0 6px #aa00ff); }
}

@media screen and (max-width: 700px) {
  body[data-page="index"] {
    height: auto;
    min-height: 100dvh;
    padding: 40px 20px;
    overflow-y: auto;
  }

  body[data-page="index"] .container {
    width: min(520px, 100%);
    height: auto;
    padding: 40px 24px;
  }

  body[data-page="index"] .typing-container {
    height: auto;
  }

  body[data-page="index"] .typing-line {
    font-size: 1.1em;
    white-space: normal;
  }

  body[data-page="index"] .btn-group {
    width: 100%;
    flex-direction: column;
    gap: 12px;
  }

  body[data-page="index"] .btn-group a {
    width: 100%;
  }
}

/* plans/index.html */
body[data-page="plans"] {
  background: linear-gradient(135deg, #3c1aff, #3c1aff);
  color: #fff;
  text-align: center;
  padding: 40px 10px;
}

body[data-page="plans"] h1 {
  font-size: 2.5em;
  margin-bottom: 20px;
  text-shadow: 0 0 8px rgba(0, 0, 0, 0.3);
}

body[data-page="plans"] .toggle-container {
  display: inline-flex;
  margin-bottom: 30px;
  background: #222;
  border-radius: 25px;
  padding: 5px;
}

body[data-page="plans"] .toggle-btn {
  border: none;
  padding: 10px 20px;
  border-radius: 20px;
  background: transparent;
  color: white;
  cursor: pointer;
  font-weight: bold;
  transition: background 0.3s;
}

body[data-page="plans"] .toggle-btn:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

body[data-page="plans"] .toggle-btn.active {
  background: orange;
  color: #fff;
}

body[data-page="plans"] .plans {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  justify-content: center;
  gap: 30px;
  max-width: 1200px;
  margin: auto;
  padding: 10px;
}

body[data-page="plans"] .plan-card {
  font-size: 0.9em;
  background: #444;
  border-radius: 15px;
  padding: 20px;
  margin: 10px;
  text-align: center;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s;
  position: relative;
  box-sizing: border-box;
}

body[data-page="plans"] .plan-card:hover {
  transform: translateY(-5px);
}

body[data-page="plans"] .plan-free { background: linear-gradient(135deg, #00c6ff, #0072ff); }
body[data-page="plans"] .plan-basic { background: linear-gradient(135deg, #ffe259, #ffa751); }
body[data-page="plans"] .plan-pro { background: linear-gradient(135deg, #9D50BB, #6E48AA); }
body[data-page="plans"] .plan-premium { background: linear-gradient(135deg, #ff758c, #ff7eb3); }
body[data-page="plans"] .plan-unlimited { background: linear-gradient(135deg, #1a2a6c, #b21f1f, #fdbb2d); }

body[data-page="plans"] .price {
  font-size: 1.8em;
  font-weight: bold;
  margin: 10px 0;
}

body[data-page="plans"] .plan-details {
  list-style: none;
  padding: 0;
  margin: 10px 0;
  font-size: 0.9em;
}

body[data-page="plans"] .plan-footnote {
  font-size: 0.7em;
  margin-top: 10px;
  color: #ddd;
  font-style: italic;
}

body[data-page="plans"] .plan-details li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 6px 0;
}

body[data-page="plans"] .choose-btn {
  background: linear-gradient(45deg, #ff6a00, #ee0979);
  border: none;
  color: #fff;
  padding: 10px 20px;
  border-radius: 25px;
  font-size: 1em;
  cursor: pointer;
  transition: background 0.3s;
}

body[data-page="plans"] .choose-btn:hover {
  background: linear-gradient(45deg, #ee0979, #ff6a00);
}

body[data-page="plans"] .plan-badge {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  background: #fff;
  color: #000;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.75em;
  font-weight: 600;
}

body[data-page="plans"] .fair-use {
  font-size: 0.8em;
  color: #ddd;
  margin-top: 20px;
}

@media (max-width: 1000px) {
  body[data-page="plans"] .plans {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 600px) {
  body[data-page="plans"] .plans {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    padding: 5px;
  }
}

@media (max-width: 400px) {
  body[data-page="plans"] .plans {
    grid-template-columns: 1fr;
    gap: 15px;
    padding: 5px;
  }
}

/* success/index.html */
body[data-page="success"] {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  height: 100dvh;
  font-family: Arial, sans-serif;
  background-color: #f0f0f0;
  text-align: center;
}

body[data-page="success"] h1 {
  color: #4caf50;
}

body[data-page="success"] p {
  color: #333;
}

body[data-page="success"] a {
  color: #3399cc;
  text-decoration: none;
}

#usage-status {
  position: fixed;
  top: calc(var(--header-offset, 56px) + 8px);  /* sit just below the header */
  left: 10px;
  background: #007bff;
  color: #fff;
  border: none;
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 0.85rem;
  cursor: default;
  z-index: 1100;                                /* above page chrome */
}

#usage-status .plan-name {
  font-weight: 600;
  margin-right: 4px;
}

#usage-status.is-unlimited .usage-count,
#usage-status.is-unlimited .usage-sep {
  display: none;
}

.btn-primary{
  height:48px;padding:0 18px;border-radius:12px;border:0;
  background:linear-gradient(135deg,#6c5ce7,#ff3cac);
  color:#fff;font-weight:700;font-size:16px;
}
.btn-primary:hover{filter:brightness(1.05)}

#gfmHelpBtn{display:inline-flex !important;width:auto !important;}
/* === 2025-09-09 QMT: mobile header stacking & plan badge offset === */
@media (max-width: 640px){
  header, .header, .top-bar, .user-header{
    position: sticky !important;
    top: 0; left: 0; right: 0;
    display: flex !important;
    flex-wrap: wrap !important;
    gap: 6px !important;
    justify-content: center !important;
    padding: 8px 10px !important;
    z-index: 1000;
    background: transparent;
  }
}

/* Place the Plan badge just below the header; avoid overlap */
#usage-status{
  position: fixed;
  top: calc(env(safe-area-inset-top, 0px) + 56px);
  left: 10px;
  z-index: 1100;
}

.email-gate-modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(2px);
  z-index: 10000;
}

.email-gate-modal[aria-hidden="true"] {
  display: none;
}

.email-gate-card {
  width: min(420px, 92vw);
  background: #0f172a;
  color: #f8fafc;
  border-radius: 18px;
  padding: 28px;
  box-shadow: 0 30px 60px rgba(15, 23, 42, 0.45);
  position: relative;
  text-align: left;
}

.email-gate-card h2 {
  margin: 0 0 8px;
  font-size: 1.5rem;
}

.email-gate-card p {
  margin: 0 0 18px;
  color: #cbd5f5;
  font-size: 0.95rem;
}

.email-gate-card label {
  font-weight: 600;
  display: block;
  margin-bottom: 8px;
}

.email-gate-card input[type="email"] {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: rgba(255, 255, 255, 0.08);
  color: #f8fafc;
  font-size: 1rem;
}

.email-gate-card input[type="email"]::placeholder {
  color: rgba(226, 232, 240, 0.7);
}

.email-gate-actions {
  display: flex;
  gap: 10px;
  margin-top: 18px;
}

.email-gate-actions button {
  flex: 1;
  padding: 12px 14px;
  border-radius: 999px;
  border: none;
  font-weight: 700;
  cursor: pointer;
}

.email-gate-actions .primary {
  background: linear-gradient(135deg, #6c5ce7, #ff3cac);
  color: #fff;
}

.email-gate-actions .secondary {
  background: rgba(148, 163, 184, 0.2);
  color: #e2e8f0;
}

.email-gate-error {
  margin-top: 12px;
  color: #fca5a5;
  font-size: 0.9rem;
}

.email-gate-close {
  position: absolute;
  top: 12px;
  right: 12px;
  border: none;
  background: transparent;
  color: #e2e8f0;
  font-size: 1.5rem;
  cursor: pointer;
}