/* Copyright (c) 2025 Andrew Kroh — MIT License */

*,
*::before,
*::after {
    box-sizing: border-box;
}

:root {
    --color-bg: #f8f9fa;
    --color-surface: #ffffff;
    --color-border: #dee2e6;
    --color-text: #212529;
    --color-text-secondary: #6c757d;
    --color-primary: #0d6efd;
    --color-primary-hover: #0b5ed7;
    --color-allow: #198754;
    --color-allow-bg: #d1e7dd;
    --color-deny: #dc3545;
    --color-deny-bg: #f8d7da;
    --color-error: #856404;
    --color-error-bg: #fff3cd;
    --color-valid: #198754;
    --color-invalid: #dc3545;
    --radius: 6px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    margin: 0;
    line-height: 1.5;
}

/* Header */
header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.header-content {
    max-width: calc(1100px + 3rem);
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.header-logo {
    height: 48px;
    width: auto;
}

header h1 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
}

.subtitle {
    margin: 0;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.github-link {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
}

.github-link:hover {
    color: var(--color-text);
}

/* Main */
main {
    max-width: calc(1100px + 3rem);
    margin: 1.5rem auto;
    padding: 0 1.5rem;
}

/* Editor grid */
.editor-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 768px) {
    .editor-grid {
        grid-template-columns: 1fr;
    }
}

.expression-section,
.request-section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem;
    box-shadow: var(--shadow);
}

.expression-section > label,
.request-section > label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

textarea#expression {
    width: 100%;
    min-height: 120px;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.875rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.75rem;
    resize: vertical;
    line-height: 1.5;
}

textarea#expression:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.15);
}

.compile-status {
    margin-top: 0.5rem;
    font-size: 0.8rem;
    min-height: 1.4em;
}

.compile-status.valid {
    color: var(--color-valid);
}

.compile-status.invalid {
    color: var(--color-invalid);
}

/* Form elements */
.form-row {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.flex-grow {
    flex: 1;
}

.small-label {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.25rem;
    font-weight: 500;
}

select,
input[type="text"] {
    font-family: inherit;
    font-size: 0.875rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.4rem 0.6rem;
    background: var(--color-surface);
    color: var(--color-text);
}

select:focus,
input[type="text"]:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.15);
}

/* Headers */
.headers-section {
    margin-top: 0.25rem;
}

.headers-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.25rem;
}

.btn-small {
    font-size: 0.75rem;
    padding: 0.15rem 0.5rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    cursor: pointer;
    color: var(--color-text-secondary);
}

.btn-small:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.header-row {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.4rem;
    align-items: center;
}

.header-row .header-key {
    flex: 2;
}

.header-row .header-value {
    flex: 3;
}

.btn-remove {
    width: 28px;
    height: 28px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    cursor: pointer;
    font-size: 1rem;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    flex-shrink: 0;
}

.btn-remove:hover {
    background: var(--color-deny-bg);
    color: var(--color-deny);
    border-color: var(--color-deny);
}

/* Evaluate */
.evaluate-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 1.25rem 0;
}

#evaluate-btn {
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.55rem 2rem;
    border: none;
    border-radius: var(--radius);
    background: var(--color-primary);
    color: #fff;
    cursor: pointer;
}

#evaluate-btn:hover:not(:disabled) {
    background: var(--color-primary-hover);
}

#evaluate-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.shortcut-hint {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

/* Result */
.result-panel {
    text-align: center;
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    border: 1px solid transparent;
}

.result-panel.hidden {
    display: none;
}

.result-panel.allow {
    background: var(--color-allow-bg);
    color: var(--color-allow);
    border-color: #badbcc;
}

.result-panel.deny {
    background: var(--color-deny-bg);
    color: var(--color-deny);
    border-color: #f5c2c7;
}

.result-panel.error {
    background: var(--color-error-bg);
    color: var(--color-error);
    border-color: #ffecb5;
}

/* Reference */
.reference {
    margin-top: 1.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.reference summary {
    padding: 0.75rem 1rem;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    user-select: none;
}

.reference summary:hover {
    color: var(--color-text);
}

.reference-content {
    padding: 0 1rem 1rem;
}

.ref-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 768px) {
    .ref-columns {
        grid-template-columns: 1fr;
    }
}

.reference h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    margin: 1rem 0 0.4rem;
}

.reference h3:first-child {
    margin-top: 0;
}

.reference table {
    width: 100%;
    font-size: 0.8rem;
    border-collapse: collapse;
}

.reference td {
    padding: 0.2rem 0.5rem 0.2rem 0;
    vertical-align: top;
}

.reference td:first-child {
    white-space: nowrap;
    width: 8rem;
}

.reference code {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.8rem;
    background: var(--color-bg);
    padding: 0.1rem 0.3rem;
    border-radius: 3px;
}

.reference pre {
    background: var(--color-bg);
    padding: 0.75rem;
    border-radius: var(--radius);
    overflow-x: auto;
    font-size: 0.8rem;
    line-height: 1.6;
}

.reference pre code {
    background: none;
    padding: 0;
}

/* Footer */
footer {
    max-width: calc(1100px + 3rem);
    margin: 2rem auto 1rem;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    border-top: 1px solid var(--color-border);
}

.footer-sep {
    color: var(--color-border);
}

footer a {
    color: var(--color-primary);
    text-decoration: none;
}

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