/* ========================================
   Editorial Insurance Claims UI
   Typography-driven, minimal, confident
   ======================================== */

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

:root {
    /* Monochrome Palette */
    --color-black: #0a0a0a;
    --color-charcoal: #2a2a2a;
    --color-gray: #6b6b6b;
    --color-light-gray: #d4d4d4;
    --color-off-white: #f5f5f5;
    --color-white: #ffffff;

    /* Accent - Single, intentional use */
    --color-accent: #3a5a6a;

    /* Status Colors - Muted, editorial */
    --color-submitted: #6b7280;
    --color-in-review: #3a5a6a;
    --color-approved: #4a6b5a;
    --color-rejected: #6b4a4a;
    --color-paid: #2a4a3a;

    /* Typography Scale */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 3rem;
    --font-size-4xl: 4rem;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;

    /* Layout */
    --container-max: 1200px;
    --content-max: 720px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-charcoal);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   Layout
   ======================================== */

.container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main {
    flex: 1;
    max-width: var(--container-max);
    width: 100%;
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-xl);
}

/* ========================================
   Header
   ======================================== */

.header {
    border-bottom: 1px solid var(--color-light-gray);
    background-color: var(--color-white);
}

.header-content {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-lg) var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: var(--font-size-xl);
    font-weight: 300;
    letter-spacing: -0.02em;
    color: var(--color-black);
}

.nav {
    display: flex;
    gap: var(--space-xl);
}

.nav-link {
    font-size: var(--font-size-base);
    font-weight: 400;
    color: var(--color-gray);
    text-decoration: none;
    transition: color 0.2s ease;
    position: relative;
}

.nav-link.active {
    color: var(--color-black);
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    right: 0;
    height: 1px;
    background-color: var(--color-black);
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    margin-bottom: var(--space-3xl);
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 300;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: var(--color-black);
    margin-bottom: var(--space-sm);
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    font-weight: 300;
    color: var(--color-gray);
    letter-spacing: -0.01em;
}

.hero-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* ========================================
   Filter Bar
   ======================================== */

.filter-bar {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-2xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-light-gray);
}

.filter-button {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--font-size-sm);
    font-weight: 400;
    color: var(--color-gray);
    background-color: transparent;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    letter-spacing: -0.01em;
}

.filter-button:hover {
    color: var(--color-black);
}

.filter-button.active {
    color: var(--color-black);
    background-color: var(--color-off-white);
}

/* ========================================
   Claims List
   ======================================== */

.claims-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.claim-card {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: var(--space-lg);
    padding: var(--space-lg) 0;
    border-bottom: 1px solid var(--color-light-gray);
    text-decoration: none;
    color: inherit;
    transition: opacity 0.2s ease;
}

.claim-card:hover {
    opacity: 0.7;
}

.claim-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.claim-number {
    font-size: var(--font-size-xl);
    font-weight: 300;
    letter-spacing: -0.02em;
    color: var(--color-black);
}

.claim-meta {
    font-size: var(--font-size-sm);
    color: var(--color-gray);
}

.claim-amount {
    display: flex;
    align-items: center;
    font-size: var(--font-size-2xl);
    font-weight: 300;
    letter-spacing: -0.02em;
    color: var(--color-black);
}

.claim-status {
    display: flex;
    align-items: center;
}

/* ========================================
   Status Badge
   ======================================== */

.status-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    font-size: var(--font-size-xs);
    font-weight: 400;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-white);
    background-color: var(--color-gray);
}

.status-badge.SUBMITTED {
    background-color: var(--color-submitted);
}

.status-badge.IN_REVIEW {
    background-color: var(--color-in-review);
}

.status-badge.APPROVED {
    background-color: var(--color-approved);
}

.status-badge.REJECTED {
    background-color: var(--color-rejected);
}

.status-badge.PAID {
    background-color: var(--color-paid);
}

/* ========================================
   Forms
   ======================================== */

.form-container {
    max-width: var(--content-max);
}

.claim-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.form-label {
    font-size: var(--font-size-sm);
    font-weight: 400;
    color: var(--color-gray);
    letter-spacing: -0.01em;
    text-transform: uppercase;
    font-size: var(--font-size-xs);
    letter-spacing: 0.05em;
}

.form-input,
.form-textarea {
    padding: var(--space-md);
    font-size: var(--font-size-lg);
    font-weight: 300;
    color: var(--color-black);
    background-color: var(--color-white);
    border: none;
    border-bottom: 1px solid var(--color-light-gray);
    transition: border-color 0.2s ease;
    font-family: inherit;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-bottom-color: var(--color-black);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-light-gray);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.input-wrapper {
    position: relative;
}

.input-suffix {
    position: absolute;
    right: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    font-size: var(--font-size-lg);
    color: var(--color-gray);
    pointer-events: none;
}

.form-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: flex-end;
    margin-top: var(--space-xl);
}

/* ========================================
   Buttons
   ======================================== */

.button {
    padding: var(--space-md) var(--space-xl);
    font-size: var(--font-size-base);
    font-weight: 400;
    letter-spacing: -0.01em;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

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

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

.button-secondary {
    color: var(--color-black);
    background-color: transparent;
    border: 1px solid var(--color-light-gray);
}

.button-secondary:hover {
    background-color: var(--color-off-white);
}

.back-button {
    padding: var(--space-sm) 0;
    font-size: var(--font-size-base);
    font-weight: 400;
    color: var(--color-gray);
    background-color: transparent;
    border: none;
    cursor: pointer;
    transition: color 0.2s ease;
    margin-bottom: var(--space-xl);
    font-family: inherit;
}

.back-button:hover {
    color: var(--color-black);
}

/* ========================================
   Detail View
   ======================================== */

.detail-container {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3xl);
    margin-bottom: var(--space-3xl);
}

.detail-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.section-title {
    font-size: var(--font-size-xs);
    font-weight: 400;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-gray);
}

.detail-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.detail-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.detail-label {
    font-size: var(--font-size-xs);
    font-weight: 400;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-gray);
}

.detail-value {
    font-size: var(--font-size-lg);
    font-weight: 300;
    color: var(--color-black);
    letter-spacing: -0.01em;
}

.detail-value-amount {
    font-size: var(--font-size-2xl);
    letter-spacing: -0.02em;
}

.detail-description {
    font-size: var(--font-size-lg);
    font-weight: 300;
    line-height: 1.8;
    color: var(--color-charcoal);
    letter-spacing: -0.01em;
}

/* ========================================
   Status Timeline
   ======================================== */

.status-timeline {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.timeline-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-md);
}

.timeline-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--color-black);
    margin-top: 0.5rem;
}

.timeline-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.timeline-status {
    font-size: var(--font-size-base);
    font-weight: 400;
    color: var(--color-black);
}

.timeline-date {
    font-size: var(--font-size-sm);
    color: var(--color-gray);
}

/* ========================================
   Success Message
   ======================================== */

.success-message {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-lg);
    padding: var(--space-3xl) 0;
    animation: fadeIn 0.3s ease;
}

.success-title {
    font-size: var(--font-size-2xl);
    font-weight: 300;
    letter-spacing: -0.02em;
    color: var(--color-black);
}

.success-text {
    font-size: var(--font-size-lg);
    color: var(--color-gray);
}

/* ========================================
   Loading & Empty States
   ======================================== */

.loading {
    padding: var(--space-3xl) 0;
    text-align: center;
    font-size: var(--font-size-lg);
    font-weight: 300;
    color: var(--color-gray);
}

.empty-state {
    padding: var(--space-3xl) 0;
    text-align: center;
}

.empty-title {
    font-size: var(--font-size-2xl);
    font-weight: 300;
    letter-spacing: -0.02em;
    color: var(--color-gray);
    margin-bottom: var(--space-md);
}

.empty-text {
    font-size: var(--font-size-base);
    color: var(--color-gray);
}

/* ========================================
   Footer
   ======================================== */

.footer {
    border-top: 1px solid var(--color-light-gray);
    background-color: var(--color-white);
    margin-top: auto;
}

.footer-text {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-lg) var(--space-xl);
    font-size: var(--font-size-xs);
    color: var(--color-gray);
    text-align: center;
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 768px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .detail-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    .claim-card {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    .filter-bar {
        flex-wrap: wrap;
    }

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

    .nav {
        gap: var(--space-md);
    }
}