/* ═══════════════════════════════════════════════════════════════
   MyHealth Design System
   ═══════════════════════════════════════════════════════════════ */

/* ─── CSS Custom Properties ──────────────────────────────────── */
:root {
    /* Colors */
    --color-bg: #0f0f1a;
    --color-bg-secondary: #1a1a2e;
    --color-bg-card: #16213e;
    --color-bg-card-hover: #1a2744;
    --color-surface: rgba(255, 255, 255, 0.03);
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-focus: rgba(108, 99, 255, 0.5);

    --color-primary: #6c63ff;
    --color-primary-hover: #5a52d5;
    --color-primary-light: rgba(108, 99, 255, 0.15);
    --color-primary-glow: rgba(108, 99, 255, 0.3);

    --color-success: #2ed573;
    --color-success-bg: rgba(46, 213, 115, 0.1);
    --color-warning: #ffa502;
    --color-warning-bg: rgba(255, 165, 2, 0.1);
    --color-danger: #ff4757;
    --color-danger-bg: rgba(255, 71, 87, 0.1);
    --color-info: #45b7d1;

    --color-text: #e8e8e8;
    --color-text-secondary: #8b8da3;
    --color-text-muted: #5a5c72;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Borders */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 50%;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 30px var(--color-primary-glow);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Nav */
    --nav-height: 64px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Subtle animated gradient background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(108, 99, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(45, 183, 209, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 100%, rgba(108, 99, 255, 0.04) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-hover);
}

/* ─── Navigation ─────────────────────────────────────────────── */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(15, 15, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text);
    font-weight: 700;
    font-size: var(--font-size-lg);
    text-decoration: none;
}

.nav-logo {
    font-size: var(--font-size-xl);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    margin-left: auto;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.nav-link:hover, .nav-link.active {
    color: var(--color-primary);
    background: var(--color-primary-light);
}

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

.nav-user {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-left: var(--space-md);
}

.nav-user-name {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text);
    cursor: pointer;
    padding: var(--space-sm);
    margin-left: auto;
}

/* ─── Container ──────────────────────────────────────────────── */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: calc(var(--nav-height) + var(--space-2xl)) var(--space-lg) var(--space-2xl);
    position: relative;
    z-index: 1;
    min-height: 100vh;
}

/* ─── Cards ──────────────────────────────────────────────────── */
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.card:hover {
    border-color: rgba(255, 255, 255, 0.12);
}

.card-glass {
    background: rgba(22, 33, 62, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.card-stat {
    text-align: center;
    padding: var(--space-lg);
}

.card-stat .stat-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
}

.card-stat .stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
}

/* ─── Buttons ────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    box-shadow: 0 2px 12px rgba(108, 99, 255, 0.3);
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-hover);
    box-shadow: 0 4px 20px rgba(108, 99, 255, 0.4);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.15);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
}

.btn-ghost:hover:not(:disabled) {
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.05);
}

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

.btn-danger:hover:not(:disabled) {
    background: #e8414f;
}

.btn-sm {
    padding: 6px 12px;
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: 14px 28px;
    font-size: var(--font-size-base);
}

.btn-block {
    width: 100%;
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: var(--radius-sm);
}

/* ─── Forms ──────────────────────────────────────────────────── */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
}

.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.1);
    background: rgba(255, 255, 255, 0.06);
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238b8da3' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
    cursor: pointer;
}

.form-select option {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

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

.form-hint {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

.form-error {
    font-size: var(--font-size-xs);
    color: var(--color-danger);
    margin-top: var(--space-xs);
}

.field-unit {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-left: var(--space-xs);
}

.field-ref {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: 2px;
}

.field-status {
    display: inline-block;
    font-size: var(--font-size-xs);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    margin-left: var(--space-sm);
    font-weight: 600;
}

.field-status.normal {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.field-status.warning {
    background: var(--color-warning-bg);
    color: var(--color-warning);
}

.field-status.danger {
    background: var(--color-danger-bg);
    color: var(--color-danger);
}

/* ─── Tables ─────────────────────────────────────────────────── */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    text-align: left;
    padding: 12px 16px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}

td {
    padding: 12px 16px;
    font-size: var(--font-size-sm);
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

.value-normal { color: var(--color-success); }
.value-warning { color: var(--color-warning); }
.value-danger { color: var(--color-danger); font-weight: 600; }

/* ─── Auth Pages ─────────────────────────────────────────────── */
.auth-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--space-lg);
}

.auth-card {
    width: 100%;
    max-width: 420px;
    animation: slideUp 0.4s ease;
}

.auth-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.auth-header .logo {
    font-size: 3rem;
    margin-bottom: var(--space-md);
}

.auth-header h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text);
}

.auth-header p {
    color: var(--color-text-secondary);
    margin-top: var(--space-sm);
    font-size: var(--font-size-sm);
}

.auth-footer {
    text-align: center;
    margin-top: var(--space-xl);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.auth-footer a {
    font-weight: 600;
}

/* ─── Dashboard ──────────────────────────────────────────────── */
.page-header {
    margin-bottom: var(--space-2xl);
}

.page-header h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-text), var(--color-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-header p {
    color: var(--color-text-secondary);
    margin-top: var(--space-sm);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.quick-actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-bottom: var(--space-2xl);
}

.recent-reports {
    margin-top: var(--space-xl);
}

.section-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-lg);
    color: var(--color-text);
}

/* ─── Report Type Selector ───────────────────────────────────── */
.report-type-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.report-type-card {
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.report-type-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
    border-color: var(--color-primary);
}

.report-type-card.selected {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.report-type-card.selected::before {
    content: '✓';
    position: absolute;
    top: 12px;
    right: 12px;
    width: 24px;
    height: 24px;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
}

.report-type-card h3 {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-xs);
}

.report-type-card p {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

/* ─── History / Charts ───────────────────────────────────────── */
.history-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}

.view-tabs {
    display: flex;
    background: rgba(255, 255, 255, 0.04);
    border-radius: var(--radius-md);
    padding: 3px;
    gap: 2px;
}

.view-tab {
    padding: 8px 16px;
    border: none;
    background: none;
    color: var(--color-text-secondary);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.view-tab.active {
    background: var(--color-primary);
    color: white;
}

.chart-container {
    position: relative;
    height: 400px;
    padding: var(--space-lg);
}

/* ─── Tag / Badge ────────────────────────────────────────────── */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: var(--radius-xl);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.badge-primary {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.badge-success {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.badge-warning {
    background: var(--color-warning-bg);
    color: var(--color-warning);
}

.badge-danger {
    background: var(--color-danger-bg);
    color: var(--color-danger);
}

/* ─── Toast Notifications ────────────────────────────────────── */
.toast-container {
    position: fixed;
    top: calc(var(--nav-height) + var(--space-md));
    right: var(--space-lg);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.toast {
    padding: 12px 20px;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    animation: slideInRight 0.3s ease;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    max-width: 400px;
    box-shadow: var(--shadow-lg);
}

.toast-success {
    background: var(--color-success);
    color: white;
}

.toast-error {
    background: var(--color-danger);
    color: white;
}

.toast-info {
    background: var(--color-info);
    color: white;
}

/* ─── Loading ────────────────────────────────────────────────── */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.loading-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    gap: var(--space-md);
    color: var(--color-text-secondary);
}

.loading-page .spinner {
    width: 32px;
    height: 32px;
    border-color: rgba(108, 99, 255, 0.2);
    border-top-color: var(--color-primary);
}

/* ─── Empty State ────────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: var(--space-3xl) var(--space-xl);
    color: var(--color-text-secondary);
}

.empty-state .icon {
    font-size: 3rem;
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

.empty-state h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.empty-state p {
    margin-bottom: var(--space-xl);
}

/* ─── Confirm Dialog ─────────────────────────────────────────── */
.dialog-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3000;
    animation: fadeIn 0.2s ease;
}

.dialog {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    max-width: 400px;
    width: 90%;
    animation: slideUp 0.3s ease;
}

.dialog h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-md);
}

.dialog p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-xl);
}

.dialog-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: flex-end;
}

/* ─── Animations ─────────────────────────────────────────────── */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(100px); }
    to { opacity: 1; transform: translateX(0); }
}

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

.animate-in {
    animation: slideUp 0.4s ease;
}

/* ─── Utilities ──────────────────────────────────────────────── */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.text-center { text-align: center; }
.text-sm { font-size: var(--font-size-sm); }
.text-muted { color: var(--color-text-secondary); }
.w-full { width: 100%; }
.hidden { display: none !important; }

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 768px) {
    :root {
        --nav-height: 56px;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: rgba(15, 15, 26, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--space-md);
        border-bottom: 1px solid var(--color-border);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-user {
        display: none;
    }

    .nav-links.open .nav-user-mobile {
        display: flex;
        padding: var(--space-md);
        border-top: 1px solid var(--color-border);
        margin-top: var(--space-sm);
        justify-content: space-between;
        align-items: center;
    }

    .nav-toggle {
        display: block;
    }

    .container {
        padding: calc(var(--nav-height) + var(--space-lg)) var(--space-md) var(--space-lg);
    }

    .auth-wrapper {
        padding: var(--space-md);
    }

    .page-header h1 {
        font-size: var(--font-size-2xl);
    }

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

    .history-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .chart-container {
        height: 300px;
        padding: var(--space-md);
    }

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

    .quick-actions .btn {
        width: 100%;
    }

    .dialog {
        margin: var(--space-md);
    }

    .toast-container {
        left: var(--space-md);
        right: var(--space-md);
    }

    .toast {
        max-width: 100%;
    }

    th, td {
        padding: 8px 10px;
        font-size: var(--font-size-xs);
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .report-type-cards {
        grid-template-columns: 1fr;
    }
}