:root {
  /* --- Foundation (Soft Grays) --- */
  --bg-main: #f4f6f8;        /* Base canvas: subtle cool-gray */
  --bg-panel: #ffffff;       /* Cards/Sections: pure white for clarity */
  --bg-subtle: #e9ecef;      /* Sidebars/Wells: defines functional areas */
  
  /* --- Structure & Borders --- */
  --border-dim: #d8dee9;     /* Default borders: visible but gentle */
  --border-med: #adb5bd;     /* Focus/Active: communicates solid construction */

  /* --- Typography (High Legibility) --- */
  --text-bold: #2e3440;      /* Near-black: for headers and primary data */
  --text-muted: #4c566a;     /* Slate gray: for labels and secondary info */

  /* --- Accents (Indigo & Teal) --- */
  --accent-primary: #5e81ac; /* Indigo: used for primary actions and brand */
  --accent-success: #8fbcbb; /* Teal: used for "Deployed" states and success */
  
  /* --- Utility --- */
  --status-error: #bf616a;   /* Muted red: alert without panic */
  --shadow-tactile: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-inset: inset 0 1px 2px rgba(0, 0, 0, 0.04);
}

body {
    background-color: var(--bg-main);
    color: var(--text-bold);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

main {
    background-color: var(--bg-panel);
    border: 1px solid var(--border-dim);
    box-shadow: var(--shadow-tactile);
    border-radius: 6px;
    padding: 2.5rem;
    width: 100%;
    max-width: 400px;
}

h1 {
    margin-top: 0;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-bold);
    text-align: center;
}

.form-group {
    margin-bottom: 1.25rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-dim);
    border-radius: 4px;
    background-color: #fff;
    box-shadow: var(--shadow-inset);
    font-size: 1rem;
    color: var(--text-bold);
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box; /* Ensure padding doesn't affect width */
}

input[type="text"]:focus,
input[type="password"]:focus {
    border-color: var(--accent-primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(94, 129, 172, 0.15);
}

label:has(input[type="checkbox"]) {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    cursor: pointer;
}

button[type="submit"], input[type="submit"] {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 1.5rem;
    box-shadow: var(--shadow-tactile);
    transition: background-color 0.2s, transform 0.1s;
}

button[type="submit"]:hover, input[type="submit"]:hover {
    filter: brightness(110%);
}

button[type="submit"]:active, input[type="submit"]:active {
    transform: translateY(1px);
    box-shadow: none;
}

.validation-errors {
    background-color: rgba(191, 97, 106, 0.1);
    border: 1px solid var(--status-error);
    color: var(--status-error);
    padding: 0.75rem;
    border-radius: 4px;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.validation-errors p {
    margin: 0;
}

/* Continue with GitHub (modules/github_auth) */
.github-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    box-sizing: border-box;
    padding: 0.75rem;
    border-radius: 4px;
    background-color: #24292f;
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
}

.github-btn:hover {
    background-color: #32383f;
}

.or-divider {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 1.25rem 0;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.or-divider::before,
.or-divider::after {
    content: "";
    flex: 1;
    border-top: 1px solid var(--border-dim);
}

.flash-message {
    background: #fbe5e5;
    color: #a12c2c;
    border-radius: 4px;
    padding: 0.75rem;
    margin-bottom: 1.25rem;
    font-size: 0.9rem;
}