/* ==========================
   Google Fonts für alten Stil
   ========================== */
@import url('https://fonts.googleapis.com/css2?family=IM+Fell+English&display=swap');

/* ==========================
   Root Variablen – "Altes Buch"-Stil (Light Mode)
   ========================== */
:root {
  --bg-color: #fdf7e2;
  --bg-secondary: #f9f1d2;
  --text-color: #3b2f2f;
  --accent: #8b5c2c;
  --primary: #5a473a;
  --secondary: #c4a484;
  --border-color: #bfa980;
  --input-bg: #fffef8;
  --input-focus: #8b5c2c;
  --message-bg: #f3e8c8;
  --font-main: 'IM Fell English', serif;
}

/* ==========================
   Dark Mode – mystisch-literarisch
   ========================== */
.dark-mode {
  --bg-color: #2f2b25;
  --bg-secondary: #3b342c;
  --text-color: #eae3d5;
  --accent: #d4a96b;
  --primary: #4a3a2b;
  --secondary: #a98d66;
  --border-color: #5c4b3b;
  --input-bg: #3b342c;
  --input-focus: #d4a96b;
  --message-bg: #4a4135;
}

/* ==========================
   Grundstruktur
   ========================== */
body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  padding: 0;
  line-height: 1.8;
  font-size: 1.1rem;
  background-image: url('https://www.transparenttextures.com/patterns/paper-fibers.png');
  background-repeat: repeat;
}

a {
  color: var(--accent);
  text-decoration: underline;
}

a:hover {
  color: var(--text-color);
  background-color: var(--bg-secondary);
}

/* ==========================
   Container & Layout
   ========================== */
.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 2rem;
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

/* ==========================
   Header & Navigation
   ========================== */
header {
  background-color: var(--primary);
  color: white;
  padding: 1.2rem;
  font-family: var(--font-main);
  letter-spacing: 1px;
  text-transform: uppercase;
}

nav a {
  color: white;
  font-weight: normal;
  font-family: var(--font-main);
}

nav a:hover {
  text-decoration: underline;
}

/* ==========================
   Formularfelder
   ========================== */
form {
  background: var(--bg-secondary);
  padding: 2rem;
  border: 1px solid var(--border-color);
  box-shadow: inset 0 0 5px rgba(0,0,0,0.05);
}

input[type="text"],
input[type="email"],
input[type="password"],
textarea,
select {
  width: 100%;
  padding: 0.6rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 0;
  background: var(--input-bg);
  color: var(--text-color);
  font-family: var(--font-main);
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--input-focus);
  background-color: #fffaf1;
  outline: none;
}

/* ==========================
   Labels
   ========================== */
label {
  font-weight: bold;
  margin-bottom: 0.25rem;
  display: block;
  font-family: var(--font-main);
}

/* ==========================
   Buttons
   ========================== */
.button, button {
  background-color: var(--accent);
  color: white;
  border: none;
  padding: 0.6rem 1.2rem;
  border-radius: 0;
  cursor: pointer;
  font-weight: normal;
  font-family: var(--font-main);
  letter-spacing: 0.5px;
}

.button:hover, button:hover {
  background-color: #704422;
}

button[disabled] {
  background-color: #aaa;
}

/* ==========================
   Nachrichtenbereich
   ========================== */
.message {
  background-color: var(--message-bg);
  padding: 1rem;
  border-left: 5px solid var(--accent);
  font-style: italic;
  font-family: var(--font-main);
  margin-bottom: 1.5rem;
}

.message.sender {
  background-color: var(--accent);
  color: white;
  text-align: right;
}

.message.receiver {
  background-color: var(--message-bg);
  color: var(--text-color);
  text-align: left;
}

/* ==========================
   Mobilfreundlichkeit
   ========================== */
@media (max-width: 768px) {
  nav {
    flex-direction: column;
  }

  form {
    padding: 1rem;
  }

  .button, button {
    width: 100%;
  }
}

/* ==========================
   Navigation – Mobile-Hamburger-Menü
   ========================== */
.nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.nav-toggle {
  display: none;
  background: none;
  font-size: 1.5rem;
  border: none;
  color: white;
  cursor: pointer;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    background-color: var(--primary);
    padding: 1rem;
    margin-top: 1rem;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
  }
}