/* =============================================
   SkyHeal — Auth Page CSS
   ============================================= */

:root {
  --sky-1: #0a1628;
  --sky-2: #0d2240;
  --dark-bg: #040d1a;
  --heal-green: #a8d8b9;
  --heal-green-dark: #5aab7a;
  --heal-green-mid: #7bbf9e;
  --sky-light: #a8d8ea;
  --gold: #f4c066;
  --white: #ffffff;
  --white-90: rgba(255,255,255,0.9);
  --white-70: rgba(255,255,255,0.7);
  --white-40: rgba(255,255,255,0.4);
  --white-15: rgba(255,255,255,0.15);
  --white-08: rgba(255,255,255,0.08);
  --dark-card: rgba(10,22,40,0.85);
  --dark-card-border: rgba(168,216,185,0.15);
  --error: #ff6b6b;
  --success: #a8d8b9;
  --font-serif: 'Noto Serif KR', Georgia, serif;
  --font-sans: 'Noto Sans KR', sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --radius-full: 9999px;
  --transition: all 0.35s cubic-bezier(0.4,0,0.2,1);
  --transition-fast: all 0.18s ease;
  --shadow-card: 0 24px 80px rgba(0,0,0,0.6), 0 0 0 1px rgba(168,216,185,0.08);
  --shadow-glow: 0 0 40px rgba(168,216,185,0.18);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  font-family: var(--font-sans);
  background: var(--dark-bg);
  color: var(--white);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* =============================================
   BACKGROUND CANVAS & ORBS
   ============================================= */
#auth-canvas {
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}

.bg-orb {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(90px);
  z-index: 0;
  animation: orbDrift 12s ease-in-out infinite;
}
.orb-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(74,144,217,0.12) 0%, transparent 70%);
  top: -150px; left: -100px;
  animation-delay: 0s;
}
.orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(168,216,185,0.1) 0%, transparent 70%);
  bottom: -100px; right: -50px;
  animation-delay: 4s;
}
.orb-3 {
  width: 280px; height: 280px;
  background: radial-gradient(circle, rgba(244,192,102,0.07) 0%, transparent 70%);
  top: 50%; left: 60%;
  animation-delay: 8s;
}
@keyframes orbDrift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(30px, -30px) scale(1.08); }
  66%       { transform: translate(-20px, 20px) scale(0.94); }
}

/* =============================================
   AUTH HEADER
   ============================================= */
.auth-header {
  position: fixed; top: 0; left: 0; right: 0;
  padding: 1.2rem 2rem;
  display: flex; align-items: center; justify-content: space-between;
  z-index: 100;
  background: rgba(4,13,26,0.4);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(168,216,185,0.08);
}
.auth-logo {
  display: flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-serif);
  font-size: 1.35rem; font-weight: 700;
  color: var(--white);
  text-decoration: none;
}
.logo-icon {
  color: var(--heal-green);
  animation: spin 8s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

.back-home {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--white-70);
  text-decoration: none;
  padding: 0.4rem 1rem;
  border: 1px solid var(--white-15);
  border-radius: var(--radius-full);
  transition: var(--transition-fast);
}
.back-home:hover {
  color: var(--heal-green);
  border-color: var(--heal-green);
  background: rgba(168,216,185,0.06);
}

/* =============================================
   AUTH MAIN & CARD
   ============================================= */
.auth-main {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 6rem 1.5rem 3rem;
  position: relative; z-index: 10;
}

.auth-card {
  width: 100%; max-width: 460px;
  background: var(--dark-card);
  backdrop-filter: blur(24px);
  border: 1px solid var(--dark-card-border);
  border-radius: var(--radius-xl);
  padding: 2.5rem 2.5rem 2rem;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
  animation: cardSlideIn 0.6s cubic-bezier(0.4,0,0.2,1) both;
}
@keyframes cardSlideIn {
  from { opacity: 0; transform: translateY(32px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* 카드 상단 글로우 */
.auth-card::before {
  content: '';
  position: absolute; top: 0; left: 50%;
  transform: translateX(-50%);
  width: 200px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--heal-green), transparent);
}

/* =============================================
   DRONE ILLUSTRATION
   ============================================= */
.auth-drone {
  text-align: center;
  margin-bottom: 1.2rem;
}
.auth-drone svg {
  width: 90px; height: 60px;
  filter: drop-shadow(0 0 16px rgba(168,216,185,0.25));
  animation: droneHover 3s ease-in-out infinite;
}
@keyframes droneHover {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-6px); }
}

/* =============================================
   TABS
   ============================================= */
.auth-tabs {
  display: flex; gap: 0;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--white-08);
  border-radius: var(--radius-full);
  padding: 4px;
  margin-bottom: 1.8rem;
}
.tab-btn {
  flex: 1;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  color: var(--white-40);
  font-size: 0.88rem;
  font-family: var(--font-sans);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  display: flex; align-items: center; justify-content: center; gap: 0.4rem;
}
.tab-btn.active {
  background: linear-gradient(135deg, var(--heal-green-dark), var(--heal-green-mid));
  color: var(--dark-bg);
  box-shadow: 0 4px 16px rgba(91,171,122,0.3);
}
.tab-btn:not(.active):hover { color: var(--white-70); }

/* =============================================
   FORM HEADER
   ============================================= */
.form-header {
  margin-bottom: 1.6rem;
}
.form-header h2 {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 0.4rem;
  line-height: 1.3;
}
.form-header h2 span { font-style: normal; }
.form-header p {
  color: var(--white-40);
  font-size: 0.85rem;
  line-height: 1.5;
}

/* =============================================
   FORM FIELDS
   ============================================= */
.field-group {
  margin-bottom: 1.1rem;
}
.field-group label {
  display: flex; align-items: center; gap: 0.4rem;
  font-size: 0.78rem;
  color: var(--white-70);
  margin-bottom: 0.45rem;
  letter-spacing: 0.04em;
}
.field-group label i { color: var(--heal-green); font-size: 0.7rem; }

.input-wrap {
  position: relative;
}
.input-wrap input {
  width: 100%;
  background: rgba(255,255,255,0.05);
  border: 1.5px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: 0.78rem 2.8rem 0.78rem 1rem;
  color: var(--white);
  font-size: 0.92rem;
  font-family: var(--font-sans);
  outline: none;
  transition: var(--transition-fast);
  -webkit-appearance: none;
}
.input-wrap input::placeholder { color: var(--white-40); font-size: 0.85rem; }
.input-wrap input:focus {
  border-color: var(--heal-green);
  background: rgba(168,216,185,0.05);
  box-shadow: 0 0 0 3px rgba(168,216,185,0.08);
}
.input-wrap input.error {
  border-color: var(--error);
  background: rgba(255,107,107,0.05);
}
.input-wrap input.valid {
  border-color: var(--heal-green-dark);
}

.field-icon {
  position: absolute; right: 0.9rem; top: 50%;
  transform: translateY(-50%);
  color: var(--white-40); font-size: 0.8rem;
  pointer-events: none;
  transition: var(--transition-fast);
}
.input-wrap input:focus ~ .field-icon { color: var(--heal-green); }

.toggle-pw {
  position: absolute; right: 0.9rem; top: 50%;
  transform: translateY(-50%);
  background: none; border: none;
  color: var(--white-40); font-size: 0.82rem;
  cursor: pointer;
  padding: 2px;
  transition: color 0.2s;
}
.toggle-pw:hover { color: var(--heal-green); }

.field-error {
  display: block;
  font-size: 0.75rem;
  color: var(--error);
  margin-top: 0.3rem;
  min-height: 1em;
  padding-left: 0.2rem;
}

/* =============================================
   PASSWORD STRENGTH
   ============================================= */
.pw-strength {
  display: flex; align-items: center; gap: 0.75rem;
  margin-top: 0.5rem;
}
.pw-bar {
  flex: 1; height: 3px;
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.pw-fill {
  height: 100%;
  border-radius: var(--radius-full);
  width: 0%;
  transition: width 0.4s ease, background 0.4s ease;
}
.pw-fill.weak    { width: 25%; background: var(--error); }
.pw-fill.fair    { width: 50%; background: var(--gold); }
.pw-fill.good    { width: 75%; background: #7bbf9e; }
.pw-fill.strong  { width: 100%; background: var(--heal-green-dark); }
.pw-label {
  font-size: 0.72rem;
  color: var(--white-40);
  white-space: nowrap;
  min-width: 80px;
  transition: color 0.3s;
}

/* =============================================
   FORM OPTIONS
   ============================================= */
.form-options {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 1.2rem;
}
.remember-me {
  display: flex; align-items: center; gap: 0.5rem;
  cursor: pointer; font-size: 0.82rem; color: var(--white-70);
}
.remember-me input[type="checkbox"] { display: none; }
.checkmark {
  width: 16px; height: 16px;
  border: 1.5px solid var(--white-15);
  border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition-fast);
  flex-shrink: 0;
}
.remember-me input:checked ~ .checkmark,
.remember-me input:checked + .checkmark {
  background: var(--heal-green-dark);
  border-color: var(--heal-green-dark);
}
.remember-me input:checked ~ .checkmark::after,
.remember-me input:checked + .checkmark::after {
  content: '✓';
  font-size: 0.65rem;
  color: var(--white);
  font-weight: 700;
}

.forgot-link {
  font-size: 0.82rem;
  color: var(--heal-green);
  background: none; border: none;
  cursor: pointer;
  transition: opacity 0.2s;
  font-family: var(--font-sans);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.forgot-link:hover { opacity: 0.7; }

.terms-check {
  margin-bottom: 1.2rem;
}
.terms-check .remember-me { align-items: flex-start; }
.terms-link {
  background: none; border: none;
  color: var(--heal-green); font-size: 0.82rem;
  cursor: pointer; font-family: var(--font-sans);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* =============================================
   SUBMIT BUTTON
   ============================================= */
.auth-submit {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between;
  background: linear-gradient(135deg, var(--heal-green-dark) 0%, var(--heal-green-mid) 100%);
  border: none;
  border-radius: var(--radius-full);
  padding: 0.9rem 1.6rem;
  color: var(--dark-bg);
  font-size: 0.95rem;
  font-weight: 700;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(91,171,122,0.3);
  position: relative;
  overflow: hidden;
}
.auth-submit::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}
.auth-submit:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(91,171,122,0.45); }
.auth-submit:hover::before { opacity: 1; }
.auth-submit:active { transform: translateY(0); }
.auth-submit:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.btn-arrow { font-size: 0.85rem; }

/* =============================================
   AUTH MESSAGE (success/error)
   ============================================= */
.auth-msg {
  margin-top: 0.8rem;
  padding: 0.7rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.82rem;
  display: none;
  align-items: center;
  gap: 0.5rem;
  animation: msgSlide 0.3s ease;
}
.auth-msg.show { display: flex; }
.auth-msg.error {
  background: rgba(255,107,107,0.12);
  border: 1px solid rgba(255,107,107,0.25);
  color: #ff9999;
}
.auth-msg.success {
  background: rgba(168,216,185,0.12);
  border: 1px solid rgba(168,216,185,0.3);
  color: var(--heal-green);
}
@keyframes msgSlide {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* =============================================
   SWITCH HINT
   ============================================= */
.switch-hint {
  text-align: center;
  margin-top: 1.2rem;
  font-size: 0.83rem;
  color: var(--white-40);
}
.switch-link {
  background: none; border: none;
  color: var(--heal-green); font-size: 0.83rem;
  cursor: pointer; font-family: var(--font-sans);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: opacity 0.2s;
}
.switch-link:hover { opacity: 0.7; }

/* =============================================
   SUCCESS SCREEN
   ============================================= */
.auth-success {
  text-align: center;
  padding: 1rem 0;
  animation: cardSlideIn 0.5s ease both;
}
.success-drone {
  position: relative;
  width: 100px; height: 100px;
  margin: 0 auto 1.5rem;
  display: flex; align-items: center; justify-content: center;
}
.success-rings { position: absolute; inset: 0; }
.sr {
  position: absolute; inset: 0;
  border-radius: 50%;
  border: 1.5px solid rgba(168,216,185,0.3);
  animation: successRing 2s ease-in-out infinite;
}
.sr.sr2 { inset: -12px; animation-delay: 0.4s; }
.sr.sr3 { inset: -24px; animation-delay: 0.8s; }
@keyframes successRing {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50%       { opacity: 1;   transform: scale(1.05); }
}
.success-emoji {
  font-size: 2.8rem;
  position: relative; z-index: 2;
  animation: droneHover 3s ease-in-out infinite;
  display: block;
}
.auth-success h2 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--heal-green), var(--sky-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.auth-success p { color: var(--white-70); font-size: 0.9rem; margin-bottom: 1.2rem; }
.success-countdown {
  font-size: 0.82rem;
  color: var(--white-40);
  margin-bottom: 1.4rem;
}
.success-countdown span {
  display: inline-block;
  width: 24px; height: 24px;
  background: var(--heal-green-dark);
  border-radius: 50%;
  line-height: 24px;
  color: var(--dark-bg);
  font-weight: 700;
  font-size: 0.85rem;
}

/* =============================================
   MODAL OVERLAY
   ============================================= */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(4,13,26,0.85);
  backdrop-filter: blur(12px);
  z-index: 500;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}
.modal-overlay.open { display: flex; }

.mini-modal {
  background: #0d2240;
  border: 1px solid var(--dark-card-border);
  border-radius: var(--radius-xl);
  padding: 2rem 2rem 1.5rem;
  width: 100%; max-width: 380px;
  position: relative;
  animation: cardSlideIn 0.4s ease;
  text-align: center;
}
.modal-close {
  position: absolute; top: 1rem; right: 1rem;
  width: 32px; height: 32px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--white-15);
  border-radius: 50%;
  color: var(--white-70);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
  font-size: 0.8rem;
}
.modal-close:hover { background: rgba(255,107,107,0.15); color: var(--error); }
.mini-modal-icon { font-size: 2rem; margin-bottom: 0.75rem; }
.mini-modal h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}
.mini-modal p { color: var(--white-70); font-size: 0.85rem; line-height: 1.6; }
.mini-modal .field-group { text-align: left; }

/* Terms modal */
.terms-modal-body { max-width: 480px; text-align: left; max-height: 80vh; overflow: hidden; display: flex; flex-direction: column; }
.terms-modal-body h3 { text-align: center; font-family: var(--font-serif); font-size: 1.2rem; margin-bottom: 1rem; }
.terms-content { overflow-y: auto; flex: 1; padding-right: 0.5rem; }
.terms-content::-webkit-scrollbar { width: 3px; }
.terms-content::-webkit-scrollbar-thumb { background: var(--white-15); border-radius: 2px; }
.terms-content h4 { font-size: 0.88rem; color: var(--heal-green); margin: 1rem 0 0.3rem; }
.terms-content p { font-size: 0.82rem; color: var(--white-70); line-height: 1.7; }

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 520px) {
  .auth-card { padding: 2rem 1.5rem 1.5rem; border-radius: var(--radius-lg); }
  .auth-header { padding: 1rem 1.2rem; }
  .back-home span { display: none; }
  .form-header h2 { font-size: 1.25rem; }
}