:root {
    --color-background-dark: #121212;
    --color-text-light: #ffffff;
    --color-card-background: #1e1e1e;
    --color-text-muted: #aaaaaa;
    --color-input-background: #2c2c2c;
    --color-input-border: #444444;
    --color-primary-accent: #ff9666;
    --color-dark-input-background: #1a1a1a;
    --color-dark-input-border: #333333;
    --color-input-text: #dddddd;
    --color-button-primary: hsl(19, 100%, 45%);
    --color-button-primary-hover: hsl(19, 100%, 35%);

    --spacing-xl: 3rem;
    --spacing-lg: 2rem;
    --spacing-md: 1.5rem;
    --spacing-sm: 1rem;
    --spacing-xs: 0.75rem;
    --spacing-xxs: 0.5rem;
    --spacing-xxxs: 0.25rem;

    --border-radius-lg: 8px;
    --border-radius-md: 4px;
    --border-radius-sm: 3px;

    --font-family-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--color-background-dark);
    color: var(--color-text-light);
    font-family: var(--font-family-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

.container {
    width: 100%;
    max-width: 600px;
    padding: var(--spacing-lg);
    background-color: var(--color-card-background);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
    color: var(--color-primary-accent);
}

header p {
    margin: 0;
    color: var(--color-text-muted);
}

.calculator h2,
#quote-section h2 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xxs);
    color: var(--color-text-light);
}

.form-control {
    width: 100%;
    padding: var(--spacing-xs);
    background-color: var(--color-input-background);
    border: 1px solid var(--color-input-border);
    border-radius: var(--border-radius-md);
    color: var(--color-text-light);
    box-sizing: border-box;
    transition: border-color 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
}


.form-control:focus {
    outline: none;
    border-color: var(--color-input-border);
    box-shadow: 0 0 0 0.2rem rgba(68, 68, 68, 0.25);
}

.form-control.error {
    border-color: var(--color-button-primary);
    box-shadow: 0 0 0 0.1rem var(--color-button-primary);
}

.form-text {
    color: var(--color-text-muted);
    font-size: 0.875em;
    margin-top: var(--spacing-xxxs);
    display: block;
}

.form-text a {
    color: var(--color-primary-accent);
    text-decoration: underline;
}

.form-text a:visited {
    color: var(--color-primary-accent);
}

.form-text strong {
    color: var(--color-primary-accent);
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type="number"] {
    -moz-appearance: textfield;
}

.rush-group {
    display: flex;
    align-items: center;
}

.rush-group label[for="rush"] {
    position: relative;
    padding-left: 1.75em;
    cursor: pointer;
    display: inline-block;
    margin-bottom: 0;
}

.rush-group input[type="checkbox"]#rush {
    opacity: 0;
    position: absolute;
    width: 0;
    height: 0;
}

.rush-group label[for="rush"]::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1em;
    height: 1em;
    border: 2px solid var(--color-primary-accent);
    border-radius: var(--border-radius-sm);
    background-color: transparent;
    transition: background-color 0.15s ease-in-out, border-color 0.15s ease-in-out;
}

.rush-group input[type="checkbox"]#rush:checked+label[for="rush"]::before {
    background-color: var(--color-primary-accent);
    border-color: var(--color-primary-accent);
}


#quote-section {
    margin-bottom: var(--spacing-xl);
    transition: max-height 0.5s ease-in-out, opacity 0.5s ease-in-out;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
}

#quote-section.visible {
    max-height: 750px;
    opacity: 1;
    margin-top: var(--spacing-lg);
}

.copy-group {
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
}

.copy-group label {
    flex-basis: 150px;
    flex-shrink: 0;
    margin-bottom: 0;
    color: var(--color-text-muted);
}


.display-field {
    flex-grow: 1;
    padding: var(--spacing-xs);
    background-color: var(--color-dark-input-background);
    border: 1px solid var(--color-dark-input-border);
    border-radius: var(--border-radius-md);
    color: var(--color-input-text);
    box-sizing: border-box;
    display: flex;
    align-items: center;
    min-height: 40px;
}

.instructions-group {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    background-color: var(--color-dark-input-background);
    border: 1px solid var(--color-dark-input-border);
    border-radius: var(--border-radius-md);
    color: var(--color-text-muted);
}

.instructions-group p {
    margin-top: 0;
    margin-bottom: var(--spacing-xxs);
    font-weight: bold;
    color: var(--color-primary-accent);
}

.instructions-group ul {
    list-style: none;
    padding-left: 0;
    margin-top: 0;
    margin-bottom: 0;
}

.instructions-group li {
    margin-bottom: var(--spacing-xxxs);
    padding-left: 1.2em;
    position: relative;
}

.instructions-group li::before {
    content: "•";
    color: var(--color-primary-accent);
    position: absolute;
    left: 0;
    top: 0;
}

.highlight-text {
    color: var(--color-primary-accent);
    font-weight: bold;
}


.copy-field {
    display: flex;
    flex-grow: 1;
}

.copy-field input,
.copy-field textarea {
    flex-grow: 1;
    padding: var(--spacing-xs);
    background-color: var(--color-dark-input-background);
    border: 1px solid var(--color-dark-input-border);
    border-radius: var(--border-radius-md) 0 0 var(--border-radius-md);
    color: var(--color-input-text);
    box-sizing: border-box;
    resize: vertical;
}

.copy-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--color-button-primary);
    border: 1px solid var(--color-button-primary);
    border-left: none;
    border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
    color: var(--color-text-light);
    cursor: pointer;
    transition: background-color 0.3s;
    white-space: nowrap;
}

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


button#calculate-btn {
    width: 100%;
    padding: var(--spacing-sm);
    background-color: var(--color-button-primary);
    border: none;
    border-radius: var(--border-radius-md);
    color: var(--color-text-light);
    font-size: var(--spacing-sm);
    cursor: pointer;
    transition: background-color 0.3s;
}

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

footer {
    text-align: center;
    margin-top: var(--spacing-lg);
    color: var(--color-text-muted);
}

.links a {
    color: var(--color-primary-accent);
    text-decoration: underline;
    margin: 0 var(--spacing-xxs);
}

.links a:hover {
    text-decoration: underline;
}

/* --- Admin Panel --- */
.admin-form {
    max-width: 600px;
    margin: 0 auto;
    text-align: left;
}

.admin-form textarea {
    width: 100%;
    min-height: 150px;
    background-color: var(--color-input-background);
    border: 1px solid var(--color-input-border);
    color: var(--color-text-light);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-md);
    font-family: inherit;
    box-sizing: border-box;
    resize: vertical;
}


.admin-form textarea:focus {
    outline: none;
    border-color: var(--color-input-border);
    box-shadow: 0 0 0 0.2rem rgba(68, 68, 68, 0.25);
}

.message {
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-md);
    text-align: center;
}

.success {
    background-color: rgba(40, 167, 69, 0.2);
    border: 1px solid #28a745;
    color: var(--color-text-light);
}

.error {
    background-color: rgba(220, 53, 69, 0.2);
    border: 1px solid #dc3545;
    color: var(--color-text-light);
}