/* ============================================
   NANDA TECH – Auth Pages CSS (login & signup)
   ============================================ */

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

:root {
  --primary:       #6d28d9;
  --primary-light: #8b5cf6;
  --accent:        #06b6d4;
  --accent2:       #f59e0b;
  --bg:            #050510;
  --bg2:           #0a0a1a;
  --bg3:           #0f0f2a;
  --card:          rgba(255,255,255,0.04);
  --border:        rgba(255,255,255,0.09);
  --text:          #e2e8f0;
  --muted:         #94a3b8;
  --gradient:      linear-gradient(135deg, #6d28d9, #06b6d4);
  --glow:          rgba(109,40,217,0.45);
  --red:           #ef4444;
  --green:         #10b981;
  --radius:        16px;
  --tr:            all 0.35s cubic-bezier(0.25,0.46,0.45,0.94);
}

html { scroll-behavior: smooth; }
body {
  font-family: 'Outfit', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow-x: hidden;
}

/* ── BG Orbs ───────────────────────────────── */
.auth-bg {
  position: fixed; inset: 0; z-index: 0; overflow: hidden;
  pointer-events: none;
}
.auth-bg canvas {
  position: absolute; inset: 0; width: 100%; height: 100%; opacity: .35;
}
.orb {
  position: absolute; border-radius: 50%;
  filter: blur(90px); pointer-events: none;
  animation: orbFloat 8s ease-in-out infinite;
}
.orb1 { width: 600px; height: 600px; background: radial-gradient(circle, rgba(109,40,217,.35), transparent); top:-200px; right:-150px; animation-delay:0s; }
.orb2 { width: 400px; height: 400px; background: radial-gradient(circle, rgba(6,182,212,.25), transparent);  bottom:-150px; left:-100px; animation-delay:3s; }
.orb3 { width: 300px; height: 300px; background: radial-gradient(circle, rgba(245,158,11,.18), transparent); top:40%; left:35%; animation-delay:5s; }
@keyframes orbFloat {
  0%,100% { transform: translate(0,0) scale(1); }
  33%      { transform: translate(25px,-25px) scale(1.05); }
  66%      { transform: translate(-20px,20px) scale(.95); }
}

/* ── Back to Home link ─────────────────────── */
.back-home {
  position: fixed; top: 24px; left: 24px; z-index: 100;
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 50px;
  padding: 10px 20px;
  font-size: 13px; font-weight: 600;
  color: var(--muted);
  text-decoration: none;
  transition: var(--tr);
  backdrop-filter: blur(12px);
}
.back-home:hover {
  background: rgba(109,40,217,.2);
  border-color: rgba(109,40,217,.5);
  color: #fff;
}

/* ── Auth Wrapper ──────────────────────────── */
.auth-wrapper {
  position: relative; z-index: 10;
  width: 100%;
  display: flex; align-items: center; justify-content: center;
  padding: 80px 24px 40px;
  min-height: 100vh;
}

/* ── Auth Card ─────────────────────────────── */
.auth-card {
  background: rgba(255,255,255,0.035);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 48px 44px;
  width: 100%; max-width: 480px;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow:
    0 40px 100px rgba(0,0,0,.5),
    0 0 80px rgba(109,40,217,.12),
    inset 0 1px 0 rgba(255,255,255,.08);
  transition: transform 0.08s linear;
  transform-style: preserve-3d;
  animation: cardEntrance .7s cubic-bezier(.22,1,.36,1) both;
}
.auth-card-wide { max-width: 640px; }

@keyframes cardEntrance {
  from { opacity: 0; transform: translateY(32px) scale(.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ── Logo ──────────────────────────────────── */
.auth-logo {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 28px;
}
.logo-badge-auth {
  width: 48px; height: 48px;
  background: var(--gradient);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 17px; font-weight: 900; color: #fff;
  box-shadow: 0 6px 24px var(--glow);
  flex-shrink: 0;
}
.auth-logo span {
  font-size: 22px; font-weight: 800; color: #fff;
}
.auth-logo .acc {
  background: var(--gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

/* ── Titles ────────────────────────────────── */
.auth-title {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 900; letter-spacing: -1px;
  margin-bottom: 6px;
}
.auth-sub {
  font-size: 14px; color: var(--muted); margin-bottom: 28px;
}

/* ── Alert box ─────────────────────────────── */
.alert-box {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 18px;
  border-radius: 12px;
  font-size: 14px; font-weight: 500;
  margin-bottom: 20px;
  animation: fadeIn .3s ease;
}
.alert-success { background: rgba(16,185,129,.12); border: 1px solid rgba(16,185,129,.3); color: #10b981; }
.alert-error   { background: rgba(239,68,68,.1);   border: 1px solid rgba(239,68,68,.3);  color: #ef4444; }
@keyframes fadeIn { from { opacity:0; transform: translateY(-6px); } to { opacity:1; transform:translateY(0); } }

/* ── Form fields ───────────────────────────── */
.form-row-2 {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.form-field {
  display: flex; flex-direction: column; gap: 7px; margin-bottom: 18px;
}
.form-field label {
  font-size: 13px; font-weight: 600; color: var(--muted);
  display: flex; align-items: center; gap: 7px;
}
.form-field label i { color: var(--primary-light); font-size: 12px; }
.req { color: var(--red); margin-left: 2px; }

.form-field input,
.form-field select,
.form-field textarea {
  background: rgba(255,255,255,.05);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 13px 16px;
  font-family: 'Outfit', sans-serif;
  font-size: 14px; font-weight: 500;
  color: var(--text);
  outline: none;
  transition: var(--tr);
  width: 100%;
}
.form-field input::placeholder { color: rgba(148,163,184,.5); }
.form-field input:focus {
  border-color: var(--primary-light);
  background: rgba(109,40,217,.08);
  box-shadow: 0 0 0 3px rgba(109,40,217,.15);
}
.form-field input:valid:not(:placeholder-shown) {
  border-color: rgba(16,185,129,.4);
}
.form-field input:invalid:not(:placeholder-shown):not(:focus) {
  border-color: rgba(239,68,68,.4);
}

/* Password wrap */
.pass-wrap {
  position: relative;
}
.pass-wrap input { padding-right: 46px; }
.toggle-pass {
  position: absolute; right: 14px; top: 50%; transform: translateY(-50%);
  background: none; border: none; color: var(--muted); cursor: pointer;
  font-size: 15px; transition: color .2s;
}
.toggle-pass:hover { color: var(--primary-light); }

/* Field error */
.field-err {
  display: none; font-size: 12px; color: var(--red);
  animation: fadeIn .2s ease;
}

/* ── Strength meter ────────────────────────── */
.strength-wrap {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 16px; margin-top: -10px;
}
.strength-bar {
  flex: 1; height: 4px; background: rgba(255,255,255,.08); border-radius: 2px; overflow: hidden;
}
.strength-fill {
  height: 100%; width: 0; border-radius: 2px;
  transition: width .4s ease, background .4s ease;
}
.strength-label { font-size: 12px; font-weight: 600; min-width: 70px; }

/* ── Terms checkbox ────────────────────────── */
.terms-check {
  display: flex; align-items: flex-start; gap: 10px;
  margin-bottom: 6px;
}
.terms-check input[type="checkbox"] {
  width: 17px; height: 17px; accent-color: var(--primary-light);
  flex-shrink: 0; margin-top: 2px;
}
.terms-check label { font-size: 13px; color: var(--muted); line-height: 1.6; }
.terms-check a { color: var(--primary-light); text-decoration: none; }
.terms-check a:hover { text-decoration: underline; }

/* ── Submit button ─────────────────────────── */
.auth-btn {
  width: 100%;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  background: var(--gradient);
  color: #fff;
  font-family: 'Outfit', sans-serif;
  font-size: 16px; font-weight: 700;
  padding: 16px 24px;
  border-radius: 50px; border: none;
  cursor: pointer;
  transition: var(--tr);
  box-shadow: 0 8px 30px var(--glow);
  margin-top: 8px;
  position: relative; overflow: hidden;
}
.auth-btn::before {
  content: '';
  position: absolute; inset: 0;
  background: rgba(255,255,255,.12);
  transform: translateX(-110%) skewX(-15deg);
  transition: transform .4s ease;
}
.auth-btn:hover::before { transform: translateX(110%) skewX(-15deg); }
.auth-btn:hover { transform: translateY(-3px); box-shadow: 0 16px 40px var(--glow); }
.auth-btn:disabled { opacity: .7; cursor: not-allowed; transform: none; }

/* ── Divider ───────────────────────────────── */
.auth-divider {
  display: flex; align-items: center; gap: 16px;
  margin: 24px 0 16px;
}
.auth-divider::before,
.auth-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}
.auth-divider span { font-size: 12px; color: var(--muted); font-weight: 600; letter-spacing: 1px; }

/* ── Switch link ───────────────────────────── */
.auth-switch {
  text-align: center; font-size: 14px; color: var(--muted);
}
.auth-switch a {
  color: var(--primary-light); font-weight: 700; text-decoration: none;
  margin-left: 4px; transition: color .2s;
}
.auth-switch a:hover { color: var(--accent); }

/* ── Responsive ────────────────────────────── */
@media (max-width: 640px) {
  .auth-card { padding: 36px 24px; }
  .form-row-2 { grid-template-columns: 1fr; }
  .back-home { top: 16px; left: 16px; padding: 8px 14px; font-size: 12px; }
}