:root {
    --bg-color: #f3f4f6;
    --container-bg: #ffffff;
    --header-bg: #ffffff;
    --text-color: #111827;
    --text-muted: #6b7280;
    --primary: #3D63DD;
    --primary-hover: #2b4bb5;
    --border-color: #e5e7eb;
    --input-bg: #f9fafb;
    --lock-bg: #e5e7eb;
    --lock-active: #f87171;
    --lock-text: #ffffff;
    --warning-text: #d97706;
    --warning-bg: #fef3c7;
}

[data-theme="dark"] {
    --bg-color: #111827;
    --container-bg: #1f2937;
    --header-bg: #1f2937;
    --text-color: #f9fafb;
    --text-muted: #9ca3af;
    --primary: #60a5fa;
    --primary-hover: #3b82f6;
    --border-color: #374151;
    --input-bg: #111827;
    --lock-bg: #374151;
    --lock-active: #ef4444;
    --warning-text: #fbbf24;
    --warning-bg: #451a03;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg-color: #111827;
        --container-bg: #1f2937;
        --header-bg: #1f2937;
        --text-color: #f9fafb;
        --text-muted: #9ca3af;
        --primary: #60a5fa;
        --primary-hover: #3b82f6;
        --border-color: #374151;
        --input-bg: #111827;
        --lock-bg: #374151;
        --lock-active: #ef4444;
        --warning-text: #fbbf24;
        --warning-bg: #451a03;
    }
}

body {
    font-family: system-ui, -apple-system, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    min-height: 100vh; /* Ensures the body is always at least the height of the screen */
    transition: background-color 0.3s, color 0.3s;
}

/* Header Strip */
header {
    width: 100%;
    background-color: var(--header-bg);
    padding: 30px 0 20px 0;
    margin-bottom: 40px;
    text-align: center;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    transition: background-color 0.3s;
}

.home-link {
    text-decoration: none;
    color: var(--primary);
    transition: opacity 0.2s;
}

.home-link:hover {
    opacity: 0.8;
}

header h1 {
    font-size: 2.5rem;
    margin: 0;
}

header p {
    color: var(--text-muted);
    margin-top: 5px;
}

/* Expanded Container */
.container {
    background-color: var(--container-bg);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    width: 90%;
    max-width: 650px;
    box-sizing: border-box;
    transition: background-color 0.3s;
    margin: 0 auto 40px auto; /* Centers horizontally, adds 40px gap at the bottom */
}

h2 { margin-top: 0; text-align: center; margin-bottom: 25px; }

/* Menus & Buttons */
.menu-grid { display: flex; flex-direction: column; gap: 15px; margin-top: 20px; }

button {
    background-color: var(--primary);
    color: #ffffff;
    border: none;
    padding: 15px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 12px;
    cursor: pointer;
    transition: background-color 0.2s;
    width: 100%;
}

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

/* Forms & Inputs */
.input-group { margin-bottom: 25px; display: flex; flex-direction: column; }
.input-group label { margin-bottom: 8px; font-weight: 600; font-size: 0.95rem; }
.input-row { display: flex; gap: 10px; align-items: center; }

input[type="text"], input[type="number"], input[type="date"], input[type="time"], select, textarea {
    flex: 1;
    padding: 12px;
    border: 1px solid var(--border-color);
    background-color: var(--input-bg);
    color: var(--text-color);
    border-radius: 12px;
    font-size: 16px;
    outline: none;
    box-sizing: border-box;
    font-family: inherit;
    transition: border-color 0.2s;
}

input:focus, select:focus, textarea:focus { border-color: var(--primary); }
textarea { resize: vertical; min-height: 80px; }

/* Beautiful Custom Dropdown Selects */
select {
    flex: 0.5;
    appearance: none; /* Removes default browser styling */
    -webkit-appearance: none;
    background-image: url('data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%236b7280%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E');
    background-repeat: no-repeat;
    background-position: right 15px top 50%;
    background-size: 12px auto;
    padding-right: 40px;
    cursor: pointer;
}

/* Locks */
.lock-btn {
    flex: 0 0 50px;
    height: 50px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--lock-bg);
    color: var(--text-color);
    border-radius: 12px;
    font-size: 1.2rem;
    transition: all 0.2s;
}

.lock-btn.locked { background-color: var(--lock-active); color: var(--lock-text); }
.locked-input { opacity: 0.7; pointer-events: none; }

/* Disabled Lock State */
.lock-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    background-color: var(--lock-bg);
}

/* Soft Warning */
.soft-warning {
    background-color: var(--warning-bg);
    color: var(--warning-text);
    padding: 12px;
    border-radius: 12px;
    font-size: 0.95rem;
    text-align: center;
    margin-bottom: 25px;
    display: none;
    border: 1px solid rgba(251, 191, 36, 0.3);
}

/* Theme Toggle */
.theme-toggle {
    position: fixed; bottom: 20px; left: 20px; width: 50px; height: 50px;
    border-radius: 50%;
    background-color: var(--container-bg); border: 1px solid var(--border-color);
    color: var(--text-color); font-size: 1.5rem; cursor: pointer;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1); display: flex; align-items: center;
    justify-content: center; padding: 0; transition: transform 0.2s;
}
.theme-toggle:active { transform: scale(0.9); }

/* Footer Strip */
footer { 
    width: 100%;
    background-color: var(--header-bg);
    margin-top: auto; /* This forces the footer to the absolute bottom */
    padding: 25px 0; 
    text-align: center; 
    color: var(--text-muted); 
    font-size: 0.95rem; 
    transition: background-color 0.3s;
}

    /* Footer Link Fix */
    footer a { 
        color: var(--text-color); 
        text-decoration: underline; 
        font-weight: bold; 
        transition: color 0.2s;
    }
    footer a:hover { 
        color: var(--primary); 
    }

/* Error Warning */
.error-warning {
    background-color: #fee2e2;
    color: #b91c1c;
    padding: 12px;
    border-radius: 12px;
    font-size: 0.95rem;
    text-align: center;
    margin-bottom: 25px;
    display: none;
    border: 1px solid rgba(185, 28, 28, 0.3);
}

[data-theme="dark"] .error-warning {
    background-color: #450a0a;
    color: #f87171;
    border-color: rgba(248, 113, 113, 0.3);
}