/* Reset & Base */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-primary: #2b6e3f;
    --color-primary-hover: #1e5430;
    --color-bg: #f4f6f5;
    --color-surface: #ffffff;
    --color-text: #1a1a1a;
    --color-text-muted: #5c5c5c;
    --color-border: #d0d5d1;
    --color-border-focus: #2b6e3f;
    --color-error: #c0392b;
    --color-required: #c0392b;
    --radius: 6px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.1);
    --transition: 0.2s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    padding: 2rem 1rem;
}

/* Container */
.container {
    max-width: 780px;
    margin: 0 auto;
}

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

header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.25rem;
}

.subtitle {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* Form */
form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Fieldset */
fieldset {
    border: none;
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

legend {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-primary);
    padding-bottom: 0.75rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--color-bg);
    width: 100%;
    display: block;
}

/* Form Grid */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem 1.5rem;
}

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

.form-group.full-width {
    grid-column: 1 / -1;
}

/* Labels */
label {
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.35rem;
    color: var(--color-text);
}

.required {
    color: var(--color-required);
    margin-left: 2px;
}

/* Inputs & Textareas */
input[type="text"],
input[type="url"],
input[type="tel"],
textarea {
    width: 100%;
    padding: 0.6rem 0.75rem;
    font-size: 0.95rem;
    font-family: inherit;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    color: var(--color-text);
    transition: border-color var(--transition), box-shadow var(--transition);
}

input[type="text"]:focus,
input[type="url"]:focus,
input[type="tel"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(43, 110, 63, 0.12);
}

input::placeholder,
textarea::placeholder {
    color: #aaa;
}

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

/* Select */
select {
    width: 100%;
    padding: 0.6rem 0.75rem;
    font-size: 0.95rem;
    font-family: inherit;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    color: var(--color-text);
    transition: border-color var(--transition), box-shadow var(--transition);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%235c5c5c' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.25rem;
}

select:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(43, 110, 63, 0.12);
}

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

/* Product list */
.product-list {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 0.5rem;
}

.product-item {
    padding: 0.6rem 0.85rem;
    background: var(--color-bg);
    border-radius: var(--radius);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.product-item-name {
    font-size: 0.9rem;
}

.product-item-info {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    margin-top: 0.2rem;
}

@media (max-width: 600px) {
    .product-list {
        grid-template-columns: 1fr;
    }
}

/* Contact card */
.contact-details {
    margin-top: 0.75rem;
}

.contact-card {
    padding: 0.85rem 1rem;
    background: var(--color-bg);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.contact-name {
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0.3rem;
}

.contact-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* Requester card (read-only user info) */
.requester-card {
    padding: 0.85rem 1rem;
    background: var(--color-bg);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.requester-name {
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0.4rem;
}

.requester-meta {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.requester-label {
    font-weight: 500;
    color: var(--color-text);
}

.contact-comment {
    margin-top: 0.4rem;
    font-size: 0.85rem;
    font-style: italic;
    color: var(--color-primary);
}

/* Word count */
.word-count {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    text-align: right;
    margin-top: 0.3rem;
}

.word-count-ok {
    color: var(--color-primary);
}

/* Validation styles */
input.invalid,
textarea.invalid {
    border-color: var(--color-error);
}

input.invalid:focus,
textarea.invalid:focus {
    box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.12);
}

.error-message {
    font-size: 0.78rem;
    color: var(--color-error);
    margin-top: 0.25rem;
    min-height: 1.1em;
}

/* Buttons */
.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding-top: 0.5rem;
}

.btn {
    padding: 0.65rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 500;
    font-family: inherit;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
}

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

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

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

.btn-secondary {
    background: transparent;
    color: var(--color-text-muted);
    border: 1.5px solid var(--color-border);
}

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

/* Toast notification */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--color-primary);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    font-size: 0.95rem;
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Login */
.login-card {
    max-width: 380px;
    margin: 0 auto;
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

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

.login-error {
    color: var(--color-error);
    font-size: 0.85rem;
    text-align: center;
    margin-bottom: 1rem;
}

.btn-full {
    width: 100%;
    text-align: center;
}

/* Header bar with user info */
.header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.header-bar > div:first-child {
    text-align: left;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    white-space: nowrap;
}

.user-info span {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.btn-small {
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
}

input[type="password"] {
    width: 100%;
    padding: 0.6rem 0.75rem;
    font-size: 0.95rem;
    font-family: inherit;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    color: var(--color-text);
    transition: border-color var(--transition), box-shadow var(--transition);
}

input[type="password"]:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(43, 110, 63, 0.12);
}

/* Language toggle switch */
.lang-switch-row {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 0.5rem;
}

.lang-switch {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    cursor: pointer;
    user-select: none;
}

.lang-switch input {
    display: none;
}

.lang-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    line-height: 1;
}

.lang-slider {
    position: relative;
    width: 34px;
    height: 18px;
    background: var(--color-border);
    border-radius: 9px;
    transition: background var(--transition);
}

.lang-slider::after {
    content: "";
    position: absolute;
    top: 2px;
    left: 2px;
    width: 14px;
    height: 14px;
    background: #fff;
    border-radius: 50%;
    transition: transform var(--transition);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.lang-switch input:checked + .lang-slider {
    background: var(--color-primary);
}

.lang-switch input:checked + .lang-slider::after {
    transform: translateX(16px);
}

/* Navigation */
.nav {
    display: flex;
    gap: 0;
    margin-top: 1rem;
    border-bottom: 2px solid var(--color-border);
}

.nav-link {
    padding: 0.6rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: color var(--transition), border-color var(--transition);
}

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

.nav-link.nav-active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    font-weight: 600;
}

/* Manufacturer list */
.mfr-list-header {
    margin-bottom: 1rem;
}

.mfr-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.mfr-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--color-surface);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow);
}

.mfr-list-name {
    font-weight: 500;
    font-size: 0.95rem;
}

/* Manufacturer edit form */
.mfr-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Contact chips */
.chip-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 0.5rem;
    min-height: 1.5rem;
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.6rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 999px;
    font-size: 0.82rem;
    color: var(--color-text);
}

.chip-remove {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border: none;
    background: none;
    color: var(--color-text-muted);
    font-size: 1rem;
    line-height: 1;
    cursor: pointer;
    border-radius: 50%;
    padding: 0;
    transition: background var(--transition), color var(--transition);
}

.chip-remove:hover {
    background: var(--color-error);
    color: #fff;
}

/* Add contact row */
.add-contact-row {
    display: flex;
    gap: 0.5rem;
    align-items: flex-start;
}

.add-contact-row select {
    flex: 1;
}

/* Responsive */
@media (max-width: 600px) {
    body {
        padding: 1rem 0.5rem;
    }

    header h1 {
        font-size: 1.4rem;
    }

    fieldset {
        padding: 1rem;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .form-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .header-bar {
        flex-direction: column;
        text-align: center;
    }

    .header-bar > div:first-child {
        text-align: center;
    }
}