/* ══════════════════════════════════════════════════════════
   CSS VARIABLEN
══════════════════════════════════════════════════════════ */
:root {
  --white:       #ffffff;
  --black:       #0f0f0f;
  --red:         #c41e3a;
  --red-light:   #e63946;
  --pink:        #e8688a;
  --pink-soft:   #ffd6e0;
  --gray:        #888888;
  --gray-light:  #f0f0f0;

  --font-serif: 'Cormorant Garamond', Georgia, serif;
  --font-sans:  'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ══════════════════════════════════════════════════════════
   RESET & BASE
══════════════════════════════════════════════════════════ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  height: 100%;
}

body {
  height: 100%;
  font-family: var(--font-sans);
  background: var(--white);
  color: var(--black);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
}

/* ══════════════════════════════════════════════════════════
   SCREENS
══════════════════════════════════════════════════════════ */
.screen {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

.screen.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(16px);
}

/* ══════════════════════════════════════════════════════════
   LOGIN SCREEN
══════════════════════════════════════════════════════════ */
#login-screen {
  background: var(--white);
}

.login-container {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 380px;
  padding: 2rem 2.5rem;
}

/* Header */
.login-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.header-heart {
  display: block;
  font-size: 2.8rem;
  color: var(--red);
  margin-bottom: 0.6rem;
  animation: heartbeat 1.6s ease-in-out infinite;
  line-height: 1;
}

.login-header h1 {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 300;
  letter-spacing: 0.03em;
  color: var(--black);
  line-height: 1.2;
}

.subtitle {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray);
}

/* Fields */
.field-group {
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
  margin-bottom: 1.6rem;
}

.field label {
  display: block;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 0.4rem;
}

.label-hint {
  font-weight: 300;
  text-transform: none;
  letter-spacing: 0.02em;
  color: #bbb;
}

.field input {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1.5px solid #ddd;
  padding: 0.45rem 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 300;
  color: var(--black);
  outline: none;
  transition: border-color 0.3s ease;
  -webkit-appearance: none;
}

.field input:focus {
  border-bottom-color: var(--red);
}

.field input::placeholder {
  color: #ccc;
}

/* Error message */
.error-msg {
  min-height: 1.2em;
  margin-bottom: 0.6rem;
  text-align: center;
  font-size: 0.82rem;
  font-style: italic;
  color: var(--red);
  opacity: 0;
  transition: opacity 0.3s ease;
  font-family: var(--font-serif);
}

.error-msg.visible {
  opacity: 1;
}

/* Submit button */
.submit-btn {
  width: 100%;
  padding: 0.85rem 1.2rem;
  background: var(--black);
  color: var(--white);
  border: none;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  transition: background 0.3s ease, transform 0.15s ease;
  -webkit-appearance: none;
}

.submit-btn:hover {
  background: var(--red);
}

.submit-btn:active {
  transform: scale(0.98);
}

.btn-heart {
  font-size: 1rem;
  transition: transform 0.35s var(--ease);
}

.submit-btn:hover .btn-heart {
  transform: scale(1.4);
}

/* Shake on wrong input */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  18%       { transform: translateX(-9px); }
  36%       { transform: translateX(9px); }
  54%       { transform: translateX(-6px); }
  72%       { transform: translateX(6px); }
  90%       { transform: translateX(-2px); }
}

.shake {
  animation: shake 0.55s ease;
}

/* Dekorative Hintergrundherzen */
.bg-hearts {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
}

.bg-hearts span {
  position: absolute;
  bottom: -60px;
  color: var(--pink-soft);
  animation: bgFloatUp 10s ease-in infinite;
  opacity: 0;
  user-select: none;
}

.bg-hearts span:nth-child(1) { left: 8%;  font-size: 2.5rem; animation-delay: 0s;    animation-duration: 11s; }
.bg-hearts span:nth-child(2) { left: 28%; font-size: 4rem;   animation-delay: 2.2s;  animation-duration: 9s;  }
.bg-hearts span:nth-child(3) { left: 52%; font-size: 2rem;   animation-delay: 4.5s;  animation-duration: 12s; }
.bg-hearts span:nth-child(4) { left: 72%; font-size: 3.5rem; animation-delay: 1.4s;  animation-duration: 10s; }
.bg-hearts span:nth-child(5) { left: 88%; font-size: 3rem;   animation-delay: 6s;    animation-duration: 8s;  }

@keyframes bgFloatUp {
  0%   { opacity: 0;   transform: translateY(0)    rotate(-8deg); }
  8%   { opacity: 0.25; }
  88%  { opacity: 0.12; }
  100% { opacity: 0;   transform: translateY(-110vh) rotate(8deg); }
}

/* ══════════════════════════════════════════════════════════
   HOME SCREEN
══════════════════════════════════════════════════════════ */
#home-screen {
  background: var(--white);
}

/* Canvas für Partikelanimation */
#heart-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* Tägliche Nachricht */
.daily-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 2rem;
  max-width: 620px;
  width: 100%;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 1s var(--ease), transform 1s var(--ease);
}

.daily-content.visible {
  opacity: 1;
  transform: translateY(0);
}

.main-heart {
  font-size: 4.5rem;
  color: var(--red);
  line-height: 1;
  display: block;
  margin-bottom: 1rem;
  animation: heartbeat 1.6s ease-in-out infinite;
  cursor: default;
  user-select: none;
}

.divider {
  width: 0;
  height: 1px;
  margin: 0 auto 1.4rem;
  background: linear-gradient(90deg, transparent, var(--pink), transparent);
  transition: width 1.2s 0.4s var(--ease);
}

.daily-content.visible .divider {
  width: 60px;
}

.daily-text {
  font-family: var(--font-serif);
  font-size: 1.65rem;
  font-weight: 300;
  font-style: italic;
  line-height: 1.7;
  color: var(--black);
  letter-spacing: 0.01em;

  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.9s 0.7s ease, transform 0.9s 0.7s ease;
}

.daily-content.visible .daily-text {
  opacity: 1;
  transform: translateY(0);
}

/* Special-Date-Banner */
.special-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  padding: 0.75rem 1rem;
  background: var(--red);
  color: var(--white);
  text-align: center;
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-style: italic;
  letter-spacing: 0.02em;
  z-index: 10;
  transform: translateY(-100%);
  transition: transform 0.6s 1s var(--ease);
}

.special-banner.visible {
  transform: translateY(0);
}

/* Info-Ecke */
.info-corner {
  position: fixed;
  bottom: 1.4rem;
  right: 1.4rem;
  font-size: 0.68rem;
  font-weight: 300;
  letter-spacing: 0.05em;
  color: #bbb;
  text-align: right;
  z-index: 2;
  user-select: none;
  line-height: 1.5;
}

/* Logout-Button */
.logout-btn {
  position: fixed;
  bottom: 1.3rem;
  left: 1.4rem;
  background: none;
  border: none;
  color: #ccc;
  font-size: 1rem;
  cursor: pointer;
  z-index: 2;
  padding: 0.3rem;
  transition: color 0.2s ease, transform 0.2s ease;
  -webkit-appearance: none;
}

.logout-btn:hover {
  color: var(--gray);
  transform: translateX(-2px);
}

/* ══════════════════════════════════════════════════════════
   KEYFRAMES
══════════════════════════════════════════════════════════ */
@keyframes heartbeat {
  0%, 100% { transform: scale(1); }
  14%       { transform: scale(1.18); }
  28%       { transform: scale(1); }
  42%       { transform: scale(1.1); }
  56%       { transform: scale(1); }
}

/* ══════════════════════════════════════════════════════════
   RESPONSIVE — MOBILE
══════════════════════════════════════════════════════════ */
@media (max-width: 480px) {
  .login-container {
    padding: 1.5rem 1.4rem;
  }

  .login-header h1 {
    font-size: 1.75rem;
  }

  .header-heart {
    font-size: 2.3rem;
  }

  .daily-text {
    font-size: 1.35rem;
  }

  .main-heart {
    font-size: 3.5rem;
  }

  .info-corner {
    bottom: 1rem;
    right: 1rem;
    font-size: 0.62rem;
  }

  .logout-btn {
    bottom: 0.9rem;
    left: 1rem;
  }
}

@media (max-height: 600px) {
  .login-header {
    margin-bottom: 1.5rem;
  }

  .field-group {
    gap: 1.1rem;
  }

  .daily-text {
    font-size: 1.25rem;
  }

  .main-heart {
    font-size: 3rem;
    margin-bottom: 0.5rem;
  }
}