/* CSS Reset and Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
}

:root {
    --color-primary: #b91c1c;
    --color-primary-hover: #991b1b;
    --color-secondary: #1e3a5f;
    --color-secondary-hover: #15293f;
    --color-success: #047857;
    --color-error: #dc2626;
    --color-text: #1f2937;
    --color-text-light: #6b7280;
    --color-bg: #fafafa;
    --color-white: #ffffff;
    --color-border: #d1d5db;
    --color-border-focus: #3b82f6;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --radius: 8px;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Container */
.container {
    width: 100%;
    max-width: 640px;
    margin: 0 auto;
    padding: 1.5rem 1rem;
    flex: 1;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 2rem;
}

h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin: 0 0 1rem 0;
    line-height: 1.2;
}

.intro {
    font-size: 1rem;
    color: var(--color-text);
    margin: 0 0 0.75rem 0;
}

.note {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin: 0;
    padding: 0.75rem 1rem;
    background-color: #fef3c7;
    border-radius: var(--radius);
    border-left: 3px solid #f59e0b;
}

/* Form Styles */
form {
    background: var(--color-white);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
}

fieldset {
    border: none;
    margin: 0;
    padding: 0;
}

legend {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-secondary);
    margin-bottom: 1rem;
    padding: 0;
    width: 100%;
}

.form-group {
    margin-bottom: 1rem;
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: 0;
}

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 0.375rem;
}

.required {
    color: var(--color-error);
}

input[type="text"],
input[type="email"],
select,
textarea {
    width: 100%;
    padding: 0.75rem;
    font-size: 1rem;
    font-family: inherit;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background-color: var(--color-white);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    -webkit-appearance: none;
    appearance: none;
}

select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.5rem;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

input.invalid,
select.invalid,
textarea.invalid {
    border-color: var(--color-error);
}

input.invalid:focus,
select.invalid:focus,
textarea.invalid:focus {
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.15);
}

.hint {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-light);
    margin-top: 0.25rem;
}

.error-message {
    display: block;
    font-size: 0.75rem;
    color: var(--color-error);
    margin-top: 0.25rem;
    min-height: 1rem;
}

textarea {
    resize: vertical;
    min-height: 80px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    text-decoration: none;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background-color 0.15s ease, transform 0.1s ease;
    min-height: 48px;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
}

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

.btn-secondary {
    background-color: var(--color-secondary);
    color: var(--color-white);
}

.btn-secondary:hover {
    background-color: var(--color-secondary-hover);
}

.btn-gmail {
    background-color: #ea4335;
    color: var(--color-white);
}

.btn-gmail:hover {
    background-color: #d33426;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

#findMpBtn {
    width: 100%;
    margin-top: 0.5rem;
}

.btn-loading {
    display: none;
}

.btn.loading .btn-text {
    display: none;
}

.btn.loading .btn-loading {
    display: inline;
}

/* Error Section */
.error-section {
    background-color: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    margin-top: 1.5rem;
}

.error-section p {
    margin: 0 0 0.5rem 0;
    color: var(--color-error);
}

.error-section p:last-child {
    margin-bottom: 0;
    color: var(--color-text);
}

.error-section a {
    color: var(--color-primary);
}

/* MP Result Section */
.mp-result {
    background: var(--color-white);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    margin-top: 1.5rem;
}

.mp-result h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-secondary);
    margin: 0 0 1rem 0;
}

.mp-info {
    background-color: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.mp-info p {
    margin: 0 0 0.5rem 0;
    font-size: 0.9375rem;
}

.mp-info p:last-child {
    margin-bottom: 0;
}

/* CC Info Box */
.cc-info {
    background-color: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: var(--radius);
    padding: 1rem;
    margin-top: 1.5rem;
    font-size: 0.875rem;
}

.cc-info strong {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--color-secondary);
}

.cc-info ul {
    margin: 0;
    padding-left: 1.25rem;
}

.cc-info li {
    margin-bottom: 0.25rem;
}

.cc-info li:last-child {
    margin-bottom: 0;
}

/* Email Editor */
.email-editor h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0 0 0.5rem 0;
}

.editor-hint {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin: 0 0 1rem 0;
}

.editor-meta {
    background-color: var(--color-bg);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

.editor-meta p {
    margin: 0 0 0.25rem 0;
}

.editor-meta p:last-child {
    margin-bottom: 0;
}

.email-editor .form-group {
    margin-bottom: 1rem;
}

.email-editor textarea {
    font-family: var(--font-sans);
    line-height: 1.5;
}

.preview-box {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem;
    font-size: 0.875rem;
}

.preview-box p {
    margin: 0 0 0.375rem 0;
}

.preview-box hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 0.75rem 0;
}

.preview-box pre {
    margin: 0;
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: inherit;
    font-size: 0.875rem;
    line-height: 1.5;
}

.send-note {
    font-size: 0.8125rem;
    color: var(--color-text-light);
    margin: 1.25rem 0 0 0;
    line-height: 1.5;
}

.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.copy-feedback {
    text-align: center;
    color: var(--color-success);
    font-size: 0.875rem;
    font-weight: 500;
    margin: 0.75rem 0 0 0;
}

/* Privacy Note */
.privacy-note {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    color: var(--color-text-light);
    margin: 1.5rem 0 0 0;
    text-align: center;
}

.privacy-note svg {
    flex-shrink: 0;
}

/* Footer */
footer {
    background-color: var(--color-secondary);
    color: rgba(255, 255, 255, 0.9);
    text-align: center;
    padding: 1.25rem 1rem;
    font-size: 0.8125rem;
    margin-top: auto;
}

footer p {
    margin: 0 0 0.375rem 0;
}

footer p:last-child {
    margin-bottom: 0;
}

footer a {
    color: #93c5fd;
    text-decoration: underline;
}

footer a:hover {
    color: var(--color-white);
}

/* Utility */
.hidden {
    display: none !important;
}

/* Tablet and Desktop Styles */
@media (min-width: 480px) {
    .container {
        padding: 2rem 1.5rem;
    }

    h1 {
        font-size: 2rem;
    }

    .form-row {
        flex-direction: row;
        gap: 1rem;
    }

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

    .action-buttons {
        flex-direction: row;
    }

    .action-buttons .btn {
        flex: 1;
    }
}

@media (min-width: 768px) {
    .container {
        padding: 3rem 1.5rem;
    }

    form,
    .mp-result {
        padding: 2rem;
    }

    h1 {
        font-size: 2.25rem;
    }
}

/* Focus visible for keyboard navigation */
.btn:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
a:focus-visible {
    outline: 2px solid var(--color-border-focus);
    outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
    }
}

/* Print styles */
@media print {
    body {
        background: white;
    }

    form,
    .action-buttons,
    footer {
        display: none;
    }

    .mp-result {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}