static/css/style.css

/* --- CSS Variables --- */
:root {
    --body-bg: #f0f0f0; /* Light gray background */
    --container-bg: #ffffff;
    --text-color: #333333;
    --text-color-secondary: #555555;
    --border-color: #e0e0e0;
    --input-bg: #ffffff;
    --input-border: #cccccc;
    --input-focus-border: #86b7fe; /* Bootstrap focus blue */
    --button-primary-bg: #0d6efd; /* Bootstrap primary */
    --button-primary-hover-bg: #0b5ed7;
    --button-danger-bg: #dc3545; /* Bootstrap danger */
    --button-danger-hover-bg: #bb2d3b;
    --button-text-color: #ffffff;
    --link-color: #0d6efd;
    --status-error-color: #dc3545;
    --status-success-color: #198754; /* Bootstrap success */
    --notification-bg: #f8f9fa; /* Light gray */
    --notification-border: #dee2e6;
    --shadow-color: rgba(0, 0, 0, 0.08);
    --border-radius: 8px; /* Rounded corners */
}

.dark-mode {
    --body-bg: #1a1a1a; /* Dark charcoal */
    --container-bg: #2c2c2c; /* Slightly lighter dark */
    --text-color: #e0e0e0; /* Light gray text */
    --text-color-secondary: #aaaaaa;
    --border-color: #444444; /* Darker border */
    --input-bg: #333333;
    --input-border: #555555;
    --input-focus-border: #0d6efd; /* Keep focus blue */
    --button-primary-bg: #0d6efd;
    --button-primary-hover-bg: #0b5ed7;
    --button-danger-bg: #dc3545;
    --button-danger-hover-bg: #bb2d3b;
    --button-text-color: #ffffff;
    --link-color: #58a6ff; /* Lighter blue for links */
    --status-error-color: #f86c7c;
    --status-success-color: #4cd08a;
    --notification-bg: #333333;
    --notification-border: #444444;
    --shadow-color: rgba(255, 255, 255, 0.05);
}

/* --- Global Styles --- */
* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: var(--body-bg);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease; /* Smooth theme transition */
}

/* --- Layout --- */
.container {
    max-width: 800px; /* Max width for content */
    margin: 30px auto; /* Center container */
    padding: 25px;
    background-color: var(--container-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px var(--shadow-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.content-section {
    margin-bottom: 25px;
    padding: 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--container-bg); /* Same as main container or slightly different */
}
/* Remove extra padding/border if nested inside container with padding */
.container > .content-section {
     padding: 0;
     border: none;
     background: none;
     margin-bottom: 20px;
}


h1, h2 {
    color: var(--text-color);
    margin-top: 0;
    margin-bottom: 0.75em;
}
h1 { font-size: 1.8em; }
h2 { font-size: 1.4em; }

hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 25px 0;
}

a {
    color: var(--link-color);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

/* --- Forms --- */
.form-group {
    margin-bottom: 15px;
}

label {
    display: block; /* Label on top */
    margin-bottom: 6px;
    font-weight: 500;
    color: var(--text-color-secondary);
}

input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--input-border);
    border-radius: var(--border-radius);
    background-color: var(--input-bg);
    color: var(--text-color);
    font-size: 1em;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

input[type="email"]:focus,
input[type="password"]:focus {
    outline: none;
    border-color: var(--input-focus-border);
    box-shadow: 0 0 0 2px rgba(13, 110, 253, 0.25);
}

.form-switch {
    margin-top: 15px;
    font-size: 0.9em;
    color: var(--text-color-secondary);
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 10px 18px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1em;
    font-weight: 500;
    text-align: center;
    transition: background-color 0.2s ease;
    color: var(--button-text-color); /* Common text color */
}

.btn-primary {
    background-color: var(--button-primary-bg);
}
.btn-primary:hover {
    background-color: var(--button-primary-hover-bg);
}

.btn-danger {
     background-color: var(--button-danger-bg);
}
.btn-danger:hover {
     background-color: var(--button-danger-hover-bg);
}

#theme-toggle {
    padding: 8px 12px;
    font-size: 0.9em;
    background-color: #6c757d; /* Secondary button color */
}
#theme-toggle:hover {
    background-color: #5c636a;
}


/* --- Status Messages --- */
.status-message {
    margin-top: 15px;
    padding: 10px;
    border-radius: var(--border-radius);
    font-weight: 500;
    display: none; /* Hidden by default */
    border: 1px solid transparent;
}
.status-message.success {
    color: var(--status-success-color);
    background-color: rgba(25, 135, 84, 0.1); /* Light green background */
    border-color: rgba(25, 135, 84, 0.2);
}
.status-message:not(.success) { /* Default to error style */
    color: var(--status-error-color);
    background-color: rgba(220, 53, 69, 0.1); /* Light red background */
    border-color: rgba(220, 53, 69, 0.2);
}


/* --- Notifications --- */
#notifications {
    margin-top: 15px;
    padding: 15px;
    border: 1px solid var(--notification-border);
    border-radius: var(--border-radius);
    background-color: var(--notification-bg);
    min-height: 100px;
    max-height: 300px;
    overflow-y: auto;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

#notifications p {
    margin: 0 0 8px 0; /* Space below each notification */
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95em;
}
#notifications p:last-child {
    border-bottom: none;
    margin-bottom: 0;
}
#notifications p em { /* Style the placeholder */
    color: var(--text-color-secondary);
    font-style: italic;
}