/*
 * Material Design CSS - FormPay
 * Inspired by Google's Material Design 3
 */

/* ===== CSS Variables ===== */
:root {
    /* Primary Colors - Google Blue */
    --md-primary: #1a73e8;
    --md-primary-light: #4285f4;
    --md-primary-dark: #1557b0;
    --md-primary-container: #d3e3fd;
    --md-on-primary: #ffffff;
    --md-on-primary-container: #001d36;

    /* Secondary Colors */
    --md-secondary: #5f6368;
    --md-secondary-container: #e8eaed;
    --md-on-secondary: #ffffff;

    /* Tertiary - Accent */
    --md-tertiary: #1e8e3e;
    --md-tertiary-container: #ceead6;

    /* Error */
    --md-error: #d93025;
    --md-error-container: #fce8e6;
    --md-on-error: #ffffff;

    /* Warning */
    --md-warning: #f9ab00;
    --md-warning-container: #fef7e0;

    /* Surface Colors */
    --md-surface: #ffffff;
    --md-surface-dim: #f8f9fa;
    --md-surface-bright: #ffffff;
    --md-surface-container: #f1f3f4;
    --md-surface-container-low: #f8f9fa;
    --md-surface-container-high: #e8eaed;
    --md-surface-variant: #e8eaed;

    /* Text Colors */
    --md-on-surface: #202124;
    --md-on-surface-variant: #5f6368;
    --md-outline: #dadce0;
    --md-outline-variant: #e8eaed;

    /* Typography */
    --md-font-family: 'Google Sans', 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --md-font-mono: 'Roboto Mono', 'Consolas', monospace;

    /* Elevation (shadows) */
    --md-elevation-1: 0 1px 2px 0 rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
    --md-elevation-2: 0 1px 2px 0 rgba(60, 64, 67, 0.3), 0 2px 6px 2px rgba(60, 64, 67, 0.15);
    --md-elevation-3: 0 1px 3px 0 rgba(60, 64, 67, 0.3), 0 4px 8px 3px rgba(60, 64, 67, 0.15);
    --md-elevation-4: 0 2px 3px 0 rgba(60, 64, 67, 0.3), 0 6px 10px 4px rgba(60, 64, 67, 0.15);

    /* Border Radius */
    --md-radius-xs: 4px;
    --md-radius-sm: 8px;
    --md-radius-md: 12px;
    --md-radius-lg: 16px;
    --md-radius-xl: 24px;
    --md-radius-full: 9999px;

    /* Transitions */
    --md-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --md-transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --md-transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--md-font-family);
    font-size: 14px;
    line-height: 1.5;
    color: var(--md-on-surface);
    background: var(--md-surface-dim);
    margin: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--md-font-family);
    font-weight: 500;
    color: var(--md-on-surface);
    margin: 0 0 0.5em;
    line-height: 1.3;
}

h1 { font-size: 2rem; font-weight: 400; }
h2 { font-size: 1.5rem; font-weight: 400; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

.md-headline-large { font-size: 32px; font-weight: 400; line-height: 40px; }
.md-headline-medium { font-size: 28px; font-weight: 400; line-height: 36px; }
.md-headline-small { font-size: 24px; font-weight: 400; line-height: 32px; }
.md-title-large { font-size: 22px; font-weight: 400; line-height: 28px; }
.md-title-medium { font-size: 16px; font-weight: 500; line-height: 24px; letter-spacing: 0.15px; }
.md-title-small { font-size: 14px; font-weight: 500; line-height: 20px; letter-spacing: 0.1px; }
.md-body-large { font-size: 16px; font-weight: 400; line-height: 24px; letter-spacing: 0.5px; }
.md-body-medium { font-size: 14px; font-weight: 400; line-height: 20px; letter-spacing: 0.25px; }
.md-body-small { font-size: 12px; font-weight: 400; line-height: 16px; letter-spacing: 0.4px; }
.md-label-large { font-size: 14px; font-weight: 500; line-height: 20px; letter-spacing: 0.1px; }
.md-label-medium { font-size: 12px; font-weight: 500; line-height: 16px; letter-spacing: 0.5px; }
.md-label-small { font-size: 11px; font-weight: 500; line-height: 16px; letter-spacing: 0.5px; }

/* ===== App Layout ===== */
.md-app {
    display: flex;
    min-height: 100vh;
}

.md-sidebar {
    width: 280px;
    background: var(--md-surface);
    border-right: 1px solid var(--md-outline);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transition: transform var(--md-transition-slow);
}

.md-sidebar-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--md-outline-variant);
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 64px;
}

.md-sidebar-logo {
    width: 40px;
    height: 40px;
    background: var(--md-primary);
    border-radius: var(--md-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--md-on-primary);
    font-weight: 600;
    font-size: 18px;
}

.md-sidebar-brand {
    flex: 1;
}

.md-sidebar-brand h1 {
    font-size: 18px;
    font-weight: 500;
    margin: 0;
    color: var(--md-on-surface);
}

.md-sidebar-brand span {
    font-size: 12px;
    color: var(--md-on-surface-variant);
}

.md-sidebar-nav {
    flex: 1;
    padding: 8px 12px;
    overflow-y: auto;
}

.md-nav-section {
    margin-bottom: 8px;
}

.md-nav-section-title {
    font-size: 11px;
    font-weight: 500;
    color: var(--md-on-surface-variant);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 16px 16px 8px;
}

.md-nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--md-radius-full);
    color: var(--md-on-surface-variant);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all var(--md-transition-fast);
    margin-bottom: 2px;
    cursor: pointer;
    border: none;
    background: transparent;
    width: 100%;
    text-align: left;
}

.md-nav-item:hover {
    background: var(--md-surface-container);
    color: var(--md-on-surface);
}

.md-nav-item.active {
    background: var(--md-primary-container);
    color: var(--md-primary);
}

.md-nav-item i {
    font-size: 20px;
    width: 24px;
    text-align: center;
}

.md-sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--md-outline-variant);
}

/* Main Content */
.md-main {
    flex: 1;
    margin-left: 280px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.md-topbar {
    height: 64px;
    background: var(--md-surface);
    border-bottom: 1px solid var(--md-outline);
    display: flex;
    align-items: center;
    padding: 0 24px;
    gap: 16px;
    position: sticky;
    top: 0;
    z-index: 50;
}

.md-topbar-title {
    flex: 1;
    font-size: 18px;
    font-weight: 400;
    color: var(--md-on-surface);
}

.md-content {
    flex: 1;
    padding: 24px;
}

/* ===== Cards ===== */
.md-card {
    background: var(--md-surface);
    border-radius: var(--md-radius-lg);
    box-shadow: var(--md-elevation-1);
    overflow: hidden;
}

.md-card-elevated {
    box-shadow: var(--md-elevation-2);
}

.md-card-outlined {
    box-shadow: none;
    border: 1px solid var(--md-outline);
}

.md-card-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--md-outline-variant);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.md-card-title {
    font-size: 16px;
    font-weight: 500;
    color: var(--md-on-surface);
    margin: 0;
}

.md-card-subtitle {
    font-size: 14px;
    color: var(--md-on-surface-variant);
    margin: 4px 0 0;
}

.md-card-body {
    padding: 24px;
}

.md-card-actions {
    padding: 12px 16px;
    border-top: 1px solid var(--md-outline-variant);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* ===== Buttons ===== */
.md-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--md-font-family);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.1px;
    padding: 10px 24px;
    border-radius: var(--md-radius-full);
    border: none;
    cursor: pointer;
    transition: all var(--md-transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.md-btn:disabled {
    opacity: 0.38;
    cursor: not-allowed;
}

.md-btn i {
    font-size: 18px;
}

/* Filled Button */
.md-btn-filled {
    background: var(--md-primary);
    color: var(--md-on-primary);
}

.md-btn-filled:hover:not(:disabled) {
    box-shadow: var(--md-elevation-1);
    background: var(--md-primary-dark);
}

/* Tonal Button */
.md-btn-tonal {
    background: var(--md-primary-container);
    color: var(--md-primary);
}

.md-btn-tonal:hover:not(:disabled) {
    box-shadow: var(--md-elevation-1);
}

/* Outlined Button */
.md-btn-outlined {
    background: transparent;
    color: var(--md-primary);
    border: 1px solid var(--md-outline);
}

.md-btn-outlined:hover:not(:disabled) {
    background: var(--md-primary-container);
    border-color: var(--md-primary);
}

/* Text Button */
.md-btn-text {
    background: transparent;
    color: var(--md-primary);
    padding: 10px 12px;
}

.md-btn-text:hover:not(:disabled) {
    background: var(--md-primary-container);
}

/* Icon Button */
.md-btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--md-radius-full);
    background: transparent;
    color: var(--md-on-surface-variant);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all var(--md-transition-fast);
}

.md-btn-icon:hover {
    background: var(--md-surface-container);
}

.md-btn-icon i {
    font-size: 20px;
}

/* FAB */
.md-fab {
    width: 56px;
    height: 56px;
    border-radius: var(--md-radius-lg);
    background: var(--md-primary-container);
    color: var(--md-primary);
    border: none;
    cursor: pointer;
    box-shadow: var(--md-elevation-3);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all var(--md-transition-fast);
}

.md-fab:hover {
    box-shadow: var(--md-elevation-4);
}

.md-fab i {
    font-size: 24px;
}

/* Extended FAB */
.md-fab-extended {
    width: auto;
    padding: 0 20px;
    gap: 12px;
    font-weight: 500;
}

/* Button Sizes */
.md-btn-sm {
    padding: 6px 16px;
    font-size: 13px;
}

.md-btn-lg {
    padding: 14px 32px;
    font-size: 15px;
}

/* Button Colors */
.md-btn-error {
    background: var(--md-error);
    color: var(--md-on-error);
}

.md-btn-error:hover:not(:disabled) {
    background: #c5221f;
}

.md-btn-success {
    background: var(--md-tertiary);
    color: #ffffff;
}

.md-btn-success:hover:not(:disabled) {
    background: #137333;
}

/* ===== Form Elements ===== */
.md-field {
    margin-bottom: 20px;
}

.md-field-label {
    display: block;
    font-size: 12px;
    font-weight: 500;
    color: var(--md-on-surface-variant);
    margin-bottom: 8px;
    letter-spacing: 0.4px;
}

.md-input {
    width: 100%;
    height: 48px;
    padding: 0 16px;
    font-family: var(--md-font-family);
    font-size: 14px;
    color: var(--md-on-surface);
    background: var(--md-surface);
    border: 1px solid var(--md-outline);
    border-radius: var(--md-radius-xs);
    transition: all var(--md-transition-fast);
}

.md-input:hover {
    border-color: var(--md-on-surface);
}

.md-input:focus {
    outline: none;
    border-color: var(--md-primary);
    border-width: 2px;
    padding: 0 15px;
}

.md-input::placeholder {
    color: var(--md-on-surface-variant);
}

.md-input:disabled {
    background: var(--md-surface-container);
    color: var(--md-on-surface-variant);
    cursor: not-allowed;
}

/* Outlined Input */
.md-input-outlined {
    background: transparent;
}

/* Filled Input */
.md-input-filled {
    background: var(--md-surface-container);
    border: none;
    border-bottom: 1px solid var(--md-outline);
    border-radius: var(--md-radius-xs) var(--md-radius-xs) 0 0;
}

.md-input-filled:focus {
    border-bottom-width: 2px;
    border-bottom-color: var(--md-primary);
}

/* Select */
.md-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath fill='%235f6368' d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

/* Textarea */
.md-textarea {
    height: auto;
    min-height: 100px;
    padding: 12px 16px;
    resize: vertical;
}

/* Checkbox */
.md-checkbox {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-size: 14px;
    color: var(--md-on-surface);
}

.md-checkbox input {
    width: 18px;
    height: 18px;
    accent-color: var(--md-primary);
    cursor: pointer;
}

/* ===== Tables ===== */
.md-table-container {
    overflow-x: auto;
    border-radius: var(--md-radius-lg);
    border: 1px solid var(--md-outline);
}

.md-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.md-table th {
    background: var(--md-surface-container-low);
    font-weight: 500;
    color: var(--md-on-surface-variant);
    text-align: left;
    padding: 14px 16px;
    border-bottom: 1px solid var(--md-outline);
    white-space: nowrap;
}

.md-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--md-outline-variant);
    color: var(--md-on-surface);
}

.md-table tbody tr {
    transition: background var(--md-transition-fast);
}

.md-table tbody tr:hover {
    background: var(--md-surface-container-low);
}

.md-table tbody tr:last-child td {
    border-bottom: none;
}

.md-table-clickable tbody tr {
    cursor: pointer;
}

/* ===== Chips/Badges ===== */
.md-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 500;
    border-radius: var(--md-radius-sm);
    background: var(--md-surface-container);
    color: var(--md-on-surface-variant);
}

.md-chip-primary {
    background: var(--md-primary-container);
    color: var(--md-primary);
}

.md-chip-success {
    background: var(--md-tertiary-container);
    color: var(--md-tertiary);
}

.md-chip-error {
    background: var(--md-error-container);
    color: var(--md-error);
}

.md-chip-warning {
    background: var(--md-warning-container);
    color: #b06000;
}

/* ===== Dialog/Modal ===== */
.md-dialog-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.32);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--md-transition-normal);
}

.md-dialog-overlay.show {
    opacity: 1;
    visibility: visible;
}

.md-dialog {
    background: var(--md-surface);
    border-radius: var(--md-radius-xl);
    box-shadow: var(--md-elevation-4);
    width: 90%;
    max-width: 560px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transform: scale(0.9);
    transition: transform var(--md-transition-normal);
}

.md-dialog-overlay.show .md-dialog {
    transform: scale(1);
}

.md-dialog-header {
    padding: 24px 24px 16px;
}

.md-dialog-title {
    font-size: 24px;
    font-weight: 400;
    margin: 0;
    color: var(--md-on-surface);
}

.md-dialog-body {
    padding: 0 24px 24px;
    overflow-y: auto;
    color: var(--md-on-surface-variant);
    font-size: 14px;
    line-height: 1.6;
}

.md-dialog-actions {
    padding: 16px 24px 24px;
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* ===== Snackbar/Toast ===== */
.md-snackbar {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #323232;
    color: #ffffff;
    padding: 14px 24px;
    border-radius: var(--md-radius-xs);
    font-size: 14px;
    box-shadow: var(--md-elevation-3);
    display: flex;
    align-items: center;
    gap: 16px;
    z-index: 2000;
    opacity: 0;
    transition: all var(--md-transition-normal);
}

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

.md-snackbar-action {
    color: var(--md-primary-light);
    font-weight: 500;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

/* ===== Search ===== */
.md-search {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--md-surface-container);
    border-radius: var(--md-radius-full);
    padding: 0 16px;
    height: 48px;
    transition: all var(--md-transition-fast);
}

.md-search:focus-within {
    background: var(--md-surface);
    box-shadow: var(--md-elevation-2);
}

.md-search i {
    color: var(--md-on-surface-variant);
    font-size: 20px;
}

.md-search input {
    flex: 1;
    background: transparent;
    border: none;
    font-size: 14px;
    color: var(--md-on-surface);
    outline: none;
}

.md-search input::placeholder {
    color: var(--md-on-surface-variant);
}

/* ===== Empty State ===== */
.md-empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--md-on-surface-variant);
}

.md-empty-state i {
    font-size: 64px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.md-empty-state h3 {
    font-size: 20px;
    font-weight: 400;
    margin-bottom: 8px;
    color: var(--md-on-surface);
}

.md-empty-state p {
    font-size: 14px;
    margin-bottom: 24px;
}

/* ===== Loading ===== */
.md-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--md-surface-container);
    border-top-color: var(--md-primary);
    border-radius: 50%;
    animation: md-spin 0.8s linear infinite;
}

@keyframes md-spin {
    to { transform: rotate(360deg); }
}

.md-skeleton {
    background: linear-gradient(90deg, var(--md-surface-container) 25%, var(--md-surface-container-high) 50%, var(--md-surface-container) 75%);
    background-size: 200% 100%;
    animation: md-shimmer 1.5s infinite;
    border-radius: var(--md-radius-xs);
}

@keyframes md-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ===== Divider ===== */
.md-divider {
    height: 1px;
    background: var(--md-outline-variant);
    margin: 16px 0;
}

/* ===== Avatar ===== */
.md-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--md-primary-container);
    color: var(--md-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    font-size: 16px;
    overflow: hidden;
}

.md-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.md-avatar-sm { width: 32px; height: 32px; font-size: 14px; }
.md-avatar-lg { width: 56px; height: 56px; font-size: 22px; }

/* ===== Lists ===== */
.md-list {
    list-style: none;
    padding: 8px 0;
    margin: 0;
}

.md-list-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    cursor: pointer;
    transition: background var(--md-transition-fast);
}

.md-list-item:hover {
    background: var(--md-surface-container-low);
}

.md-list-item-text {
    flex: 1;
    min-width: 0;
}

.md-list-item-primary {
    font-size: 14px;
    color: var(--md-on-surface);
}

.md-list-item-secondary {
    font-size: 12px;
    color: var(--md-on-surface-variant);
    margin-top: 2px;
}

/* ===== Utility Classes ===== */
.md-text-primary { color: var(--md-primary) !important; }
.md-text-error { color: var(--md-error) !important; }
.md-text-success { color: var(--md-tertiary) !important; }
.md-text-muted { color: var(--md-on-surface-variant) !important; }

.md-bg-primary { background: var(--md-primary) !important; }
.md-bg-surface { background: var(--md-surface) !important; }
.md-bg-container { background: var(--md-surface-container) !important; }

.md-shadow-1 { box-shadow: var(--md-elevation-1) !important; }
.md-shadow-2 { box-shadow: var(--md-elevation-2) !important; }
.md-shadow-3 { box-shadow: var(--md-elevation-3) !important; }

.md-rounded { border-radius: var(--md-radius-md) !important; }
.md-rounded-lg { border-radius: var(--md-radius-lg) !important; }
.md-rounded-full { border-radius: var(--md-radius-full) !important; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .md-sidebar {
        transform: translateX(-100%);
    }

    .md-sidebar.show {
        transform: translateX(0);
    }

    .md-main {
        margin-left: 0;
    }
}

@media (max-width: 768px) {
    .md-content {
        padding: 16px;
    }

    .md-card-body {
        padding: 16px;
    }

    .md-dialog {
        width: 95%;
        max-height: 85vh;
    }
}

/* ===== Animations ===== */
@keyframes md-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes md-slide-up {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.md-animate-fade { animation: md-fade-in 0.2s ease-out; }
.md-animate-slide { animation: md-slide-up 0.3s ease-out; }