/* === Basiseinstellungen === */
:root {
    --bg-color: #DAE3E5;
    --text-color: #04080F;
    --card-bg: #ffffff;
    --accent: #507DBC;
    --accent-dark: #3d67a3;
    --button-text: #fff;
    --border-color: #BBD1EA;
    --radius: 12px;
    --transition: 0.3s ease;
    --font: 'Segoe UI', sans-serif;
    --placeholder-light: #888;
    --placeholder-dark: #DAE3E5;
}

body.dark-mode {
    --bg-color: #04080F;
    --text-color: #DAE3E5;
    --card-bg: #507DBC;
    --accent: #A1C6EA;
    --accent-dark: #BBD1EA;
    --button-text: #04080F;
    --border-color: #A1C6EA;
    --placeholder: var(--placeholder-dark);
}

body:not(.dark-mode) {
    --placeholder: var(--placeholder-light);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: var(--font);
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    padding: 24px 12px;
    transition: background var(--transition), color var(--transition);
}

.container {
    width: 100%;
    max-width: 960px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--card-bg);
    padding: 16px 20px;
    border-radius: var(--radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
}

.header-img {
    height: 48px;
    border-radius: 8px;
}

#theme-toggle {
    background: none;
    border: none;
    font-size: 22px;
    cursor: pointer;
    color: var(--text-color);
    transition: transform var(--transition);
}

#theme-toggle:hover {
    transform: rotate(20deg);
}

.form-section {
    background: var(--card-bg);
    padding: 20px;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
}

input, textarea {
    padding: 12px 16px;
    font-size: 15px;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-color);
    resize: none;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.03);
    transition: border-color var(--transition), box-shadow var(--transition);
}

input::placeholder,
textarea::placeholder {
    color: var(--placeholder);
    opacity: 1;
}

input:focus, textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(80, 125, 188, 0.3);
    outline: none;
}

button {
    padding: 8px 14px;
    font-size: 13px;
    background: var(--accent);
    color: var(--button-text);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
}

button:hover {
    background: var(--accent-dark);
    transform: translateY(-1px);
}

.post-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
    margin-top: 8px;
}

.post {
    background: var(--card-bg);
    padding: 16px;
    border-radius: var(--radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 8px;
    word-break: break-word;
    overflow-wrap: break-word;
    transition: transform var(--transition), box-shadow var(--transition);
}

.post:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

.post-title {
    font-weight: 600;
    font-size: 16px;
}

.post-content {
    white-space: pre-wrap;
    overflow-wrap: break-word;
    word-break: break-word;
    font-size: 14px;
    line-height: 1.5;
}

.post-timestamp {
    font-size: 12px;
    color: var(--placeholder);
    margin-top: 4px;
    text-align: right;
    font-style: italic;
}

.post-buttons {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease-in-out;
}

.modal-content {
    background: var(--card-bg);
    color: var(--text-color);
    padding: 20px;
    border-radius: var(--radius);
    width: 90%;
    max-width: 400px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.hidden {
    display: none;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@media (max-width: 600px) {
  .post-container {
    grid-template-columns: 1fr;
  }

  .form-section {
    padding: 16px;
  }

  header {
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: space-between;
  }
}