/* ============================================================
   Beach Hydrocarbon Tracker — Styles
   Design: Apple/Stripe-inspired, vanilla CSS, no frameworks
   Typography: Inter (400, 500, 600)
   ============================================================ */

/* --- Custom Properties --- */
:root {
    --color-bg: #0a0f1a;
    --color-surface: #131a2b;
    --color-surface-elevated: #1a2236;
    --color-surface-glass: rgba(19, 26, 43, 0.85);
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-focus: rgba(100, 160, 255, 0.4);

    --color-text-primary: #e8ecf4;
    --color-text-secondary: #8892a6;
    --color-text-muted: #5a6478;

    --color-green: #34d399;
    --color-green-bg: rgba(52, 211, 153, 0.12);
    --color-yellow: #fbbf24;
    --color-yellow-bg: rgba(251, 191, 36, 0.12);
    --color-red: #f87171;
    --color-red-bg: rgba(248, 113, 113, 0.12);
    --color-orange: #fb923c;
    --color-orange-bg: rgba(251, 146, 60, 0.12);

    --color-accent: #6398f8;
    --color-accent-hover: #7fadff;
    --color-accent-bg: rgba(99, 152, 248, 0.1);

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: clamp(0.6875rem, 1.5vw, 0.75rem);
    --font-size-sm: clamp(0.75rem, 1.8vw, 0.8125rem);
    --font-size-base: clamp(0.8125rem, 2vw, 0.875rem);
    --font-size-md: clamp(0.875rem, 2.2vw, 1rem);
    --font-size-lg: clamp(1rem, 2.5vw, 1.125rem);
    --font-size-xl: clamp(1.125rem, 3vw, 1.375rem);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;

    --shadow-panel: 0 8px 32px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-modal: 0 24px 64px rgba(0, 0, 0, 0.6);

    --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
    --transition-fast: 180ms var(--ease-out);
    --transition-normal: 300ms var(--ease-out);
    --transition-slow: 500ms var(--ease-out);

    --panel-width: 360px;
    --header-height: 56px;
}

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

html {
    -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-primary);
    background: var(--color-bg);
    line-height: 1.5;
    overflow: hidden;
    height: 100vh;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

select,
input,
textarea {
    font-family: inherit;
    font-size: inherit;
}

/* --- Header --- */
.site-header {
    position: fixed;
    inset-block-start: 0;
    inset-inline: 0;
    z-index: 1000;
    height: var(--header-height);
    background: var(--color-surface-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-block-end: 1px solid var(--color-border);
}

.site-header::after {
    content: '';
    position: absolute;
    inset-block-end: -1px;
    inset-inline: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-green), var(--color-yellow), var(--color-orange), var(--color-red));
    opacity: 0.5;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding-inline: 20px;
    max-width: 100%;
    gap: 12px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-text-primary);
    flex-shrink: 0;
}

.logo-icon {
    color: var(--color-accent);
    flex-shrink: 0;
}

.logo-text {
    font-size: var(--font-size-md);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.nav-btn {
    padding: 7px 14px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast), background var(--transition-fast);
    white-space: nowrap;
}

.nav-btn:hover {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.06);
}

.nav-btn--primary {
    color: var(--color-bg);
    background: var(--color-accent);
}

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

/* Logged-in user area */
.nav-user {
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-user[hidden] {
    display: none;
}

.nav-username {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-accent);
    padding: 0 6px;
    white-space: nowrap;
}

/* --- Search Bar --- */
.search-wrapper {
    position: relative;
    flex: 0 1 280px;
}

.search-icon {
    position: absolute;
    inset-inline-start: 10px;
    inset-block-start: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 7px 12px 7px 32px;
    background: var(--color-surface-elevated);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.search-input:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px var(--color-accent-bg);
}

.search-results {
    position: absolute;
    inset-block-start: calc(100% + 6px);
    inset-inline: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-panel);
    max-height: 260px;
    overflow-y: auto;
    display: none;
    z-index: 1100;
}

.search-results.is-open {
    display: block;
}

.search-result-item {
    padding: 9px 14px;
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: background var(--transition-fast);
    border-block-end: 1px solid var(--color-border);
}

.search-result-item:last-child {
    border-block-end: none;
}

.search-result-item:hover,
.search-result-item.is-active {
    background: var(--color-accent-bg);
    color: var(--color-accent);
}

.search-no-results {
    padding: 12px 14px;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    text-align: center;
}

/* --- Main / Map --- */
.main-content {
    position: relative;
    height: 100vh;
    padding-block-start: var(--header-height);
}

.map-container {
    width: 100%;
    height: 100%;
}

.leaflet-control-zoom a {
    background: var(--color-surface) !important;
    color: var(--color-text-primary) !important;
    border-color: var(--color-border) !important;
}

.leaflet-control-zoom a:hover {
    background: var(--color-surface-elevated) !important;
}

.leaflet-control-attribution {
    display: none !important;
}

/* --- Custom Map Markers --- */
.beach-marker-wrap {
    position: relative;
    width: 28px;
    height: 28px;
}

.beach-marker {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2.5px solid rgba(255, 255, 255, 0.9);
    cursor: pointer;
    font-size: 11px;
    font-weight: 700;
    font-family: var(--font-family);
    color: #fff;
    z-index: 2;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.beach-marker:hover {
    transform: scale(1.25);
}

.beach-marker--green {
    background: linear-gradient(135deg, #34d399, #10b981);
    box-shadow: 0 2px 10px rgba(52, 211, 153, 0.6);
}

.beach-marker--yellow {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    box-shadow: 0 2px 10px rgba(251, 191, 36, 0.6);
    color: #1a1a1a;
}

.beach-marker--orange {
    background: linear-gradient(135deg, #fb923c, #f97316);
    box-shadow: 0 2px 10px rgba(251, 146, 60, 0.6);
    color: #1a1a1a;
}

.beach-marker--red {
    background: linear-gradient(135deg, #f87171, #ef4444);
    box-shadow: 0 2px 10px rgba(248, 113, 113, 0.6);
}

.beach-marker--none {
    background: var(--color-text-muted);
    font-size: 0;
}

/* Pulse ring behind marker */
.marker-pulse {
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    z-index: 1;
    animation: marker-pulse 2.5s ease-out infinite;
    will-change: transform, opacity;
}

.beach-marker--green  ~ .marker-pulse { background: rgba(52, 211, 153, 0.3); }
.beach-marker--yellow ~ .marker-pulse { background: rgba(251, 191, 36, 0.3); }
.beach-marker--orange ~ .marker-pulse { background: rgba(251, 146, 60, 0.3); }
.beach-marker--red    ~ .marker-pulse { background: rgba(248, 113, 113, 0.4); }
.beach-marker--none   ~ .marker-pulse { display: none; }

@keyframes marker-pulse {
    0%   { transform: scale(1); opacity: 0.6; }
    70%  { transform: scale(2.2); opacity: 0; }
    100% { transform: scale(2.2); opacity: 0; }
}

/* Only pulse red markers (high priority) by default */
.beach-marker--green  ~ .marker-pulse,
.beach-marker--yellow ~ .marker-pulse,
.beach-marker--orange ~ .marker-pulse {
    animation: none;
    opacity: 0;
}

.beach-marker-wrap:hover .marker-pulse {
    animation: marker-pulse 2.5s ease-out infinite;
}

/* Marker tooltip */
.leaflet-tooltip.beach-tooltip {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 4px 8px;
    font-family: var(--font-family);
    font-size: var(--font-size-xs);
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    white-space: nowrap;
}

.leaflet-tooltip.beach-tooltip::before {
    border-top-color: var(--color-surface);
}

/* --- Legend Overlay (bottom-left) --- */
.legend-overlay {
    position: fixed;
    inset-block-end: 28px;
    inset-inline-start: 12px;
    z-index: 900;
    background: var(--color-surface-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-panel);
    padding: 10px 14px;
    min-width: 170px;
    transition: all var(--transition-normal);
}

.legend-card-title {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-block-end: 8px;
}

.legend-toggle {
    position: absolute;
    inset-block-start: 8px;
    inset-inline-end: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 4px;
    color: var(--color-text-muted);
    transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

.legend-toggle:hover {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.06);
}

.legend-overlay.is-collapsed .legend-toggle {
    transform: rotate(180deg);
}

.legend-overlay.is-collapsed .legend-card-body {
    display: none;
}

.legend-overlay.is-collapsed .legend-card-title {
    margin-block-end: 0;
}

.legend-card-body {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.legend-grade {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    flex-shrink: 0;
    color: #fff;
}

.legend-grade--green  { background: var(--color-green); }
.legend-grade--yellow { background: var(--color-yellow); color: #1a1a1a; }
.legend-grade--orange { background: var(--color-orange); color: #1a1a1a; }
.legend-grade--red    { background: var(--color-red); }

.legend-label {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-text-primary);
    flex: 1;
}

.legend-range {
    font-size: 10px;
    color: var(--color-text-muted);
    font-variant-numeric: tabular-nums;
}

/* --- Detail Panel --- */
.detail-panel {
    position: fixed;
    inset-block-start: calc(var(--header-height) + 12px);
    inset-inline-end: 12px;
    z-index: 900;
    width: var(--panel-width);
    max-height: calc(100vh - var(--header-height) - 24px);
    background: var(--color-surface-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-panel);
    overflow-y: auto;
    transform: translateX(110%);
    opacity: 0;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.detail-panel.is-open {
    transform: translateX(0);
    opacity: 1;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px 12px;
    border-block-end: 1px solid var(--color-border);
    position: sticky;
    inset-block-start: 0;
    background: var(--color-surface-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1;
}

.panel-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.panel-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.panel-close:hover {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.06);
}

/* --- Detail Panel Content --- */
.detail-current {
    padding: 24px 20px 20px;
}

/* Grade + reading hero — clean, minimal */
.detail-hero {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-block-end: 24px;
}

.detail-grade {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    flex-shrink: 0;
}

.detail-hero--green  .detail-grade { color: var(--color-green); background: var(--color-green-bg); }
.detail-hero--yellow .detail-grade { color: var(--color-yellow); background: var(--color-yellow-bg); }
.detail-hero--orange .detail-grade { color: var(--color-orange); background: var(--color-orange-bg); }
.detail-hero--red    .detail-grade { color: var(--color-red); background: var(--color-red-bg); }

.detail-grade-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.detail-grade-label {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text-primary);
}

.detail-grade-date {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* PPM reading — large, clean */
.detail-reading {
    display: flex;
    align-items: baseline;
    gap: 5px;
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-block-end: 24px;
    letter-spacing: -0.03em;
    line-height: 1;
}

.detail-reading-unit {
    font-size: var(--font-size-sm);
    font-weight: 400;
    color: var(--color-text-muted);
    letter-spacing: 0;
}

/* Metadata — simple rows */
.detail-meta {
    display: flex;
    flex-direction: column;
}

.detail-meta-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-block-end: 1px solid var(--color-border);
}

.detail-meta-item:last-child {
    border-block-end: none;
}

.detail-meta-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-weight: 400;
}

.detail-meta-value {
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    font-weight: 500;
}

/* Notes */
.detail-notes {
    margin-block-start: 16px;
    padding-block-start: 12px;
    border-block-start: 1px solid var(--color-border);
}

.detail-notes .detail-meta-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-block-end: 6px;
}

.detail-notes-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.65;
}

.detail-no-data {
    padding: 40px 0;
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* History section */
.detail-history-header {
    padding: 16px 20px 10px;
    border-block-start: 1px solid var(--color-border);
}

.detail-subtitle {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.detail-history {
    padding: 4px 20px 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.history-entry {
    padding: 0;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    border-inline-start: 3px solid transparent;
    transition: background var(--transition-fast), border-color var(--transition-fast);
    overflow: hidden;
}

.history-entry:hover {
    background: rgba(255, 255, 255, 0.05);
}

/* Summary row (always visible, clickable) */
.history-summary {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    cursor: pointer;
    user-select: none;
}

.history-chevron {
    flex-shrink: 0;
    color: var(--color-text-muted);
    transition: transform var(--transition-fast);
}

.history-entry.is-expanded .history-chevron {
    transform: rotate(180deg);
}

/* Expandable detail section */
.history-expand {
    display: none;
    padding: 0 14px 12px;
    border-block-start: 1px solid var(--color-border);
    margin-block-start: 0;
}

.history-entry.is-expanded .history-expand {
    display: block;
    animation: fadeUp 250ms var(--ease-out) both;
}

.history-expand-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 8px 0;
    border-block-end: 1px solid rgba(255, 255, 255, 0.04);
}

.history-expand-row:last-child {
    border-block-end: none;
}

.history-expand-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    font-weight: 500;
}

.history-expand-val {
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    font-weight: 500;
    text-align: end;
    max-width: 60%;
}

.history-entry--green  { border-inline-start-color: var(--color-green); }
.history-entry--yellow { border-inline-start-color: var(--color-yellow); }
.history-entry--orange { border-inline-start-color: var(--color-orange); }
.history-entry--red    { border-inline-start-color: var(--color-red); }

.history-grade {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
    color: #fff;
}

.history-grade--green  { background: linear-gradient(135deg, #34d399, #10b981); }
.history-grade--yellow { background: linear-gradient(135deg, #fbbf24, #f59e0b); color: #1a1a1a; }
.history-grade--orange { background: linear-gradient(135deg, #fb923c, #f97316); color: #1a1a1a; }
.history-grade--red    { background: linear-gradient(135deg, #f87171, #ef4444); }

.history-info {
    flex: 1;
    min-width: 0;
}

.history-date {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.history-detail {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    font-weight: 500;
    margin-block-start: 1px;
}

.history-value {
    font-size: var(--font-size-sm);
    font-weight: 700;
    flex-shrink: 0;
    padding: 3px 8px;
    border-radius: 100px;
    background: rgba(255, 255, 255, 0.04);
}

.history-value--green  { color: var(--color-green); background: var(--color-green-bg); }
.history-value--yellow { color: var(--color-yellow); background: var(--color-yellow-bg); }
.history-value--orange { color: var(--color-orange); background: var(--color-orange-bg); }
.history-value--red    { color: var(--color-red); background: var(--color-red-bg); }

.history-actions {
    display: flex;
    gap: 4px;
    justify-content: flex-end;
    padding-block-start: 8px;
    margin-block-start: 4px;
    border-block-start: 1px solid rgba(255, 255, 255, 0.04);
}

.history-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.history-btn:hover {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.08);
}

.history-btn--delete:hover {
    color: var(--color-red);
    background: var(--color-red-bg);
}

/* --- Modal --- */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-overlay.is-open {
    opacity: 1;
    visibility: visible;
}

.modal {
    width: min(460px, calc(100vw - 32px));
    max-height: calc(100vh - 48px);
    overflow-y: auto;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-modal);
    transform: translateY(12px) scale(0.97);
    transition: transform var(--transition-normal);
}

.modal--sm {
    width: min(380px, calc(100vw - 32px));
}

.modal-overlay.is-open .modal {
    transform: translateY(0) scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px 16px;
    border-block-end: 1px solid var(--color-border);
}

.modal-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.modal-body {
    padding: 20px 24px 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.65;
}

.modal-body strong {
    color: var(--color-accent);
    font-weight: 500;
}

/* --- Form --- */
.modal-form {
    padding: 20px 24px 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.form-label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.form-input {
    padding: 9px 12px;
    background: var(--color-bg);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    appearance: none;
    -webkit-appearance: none;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px var(--color-accent-bg);
}

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

select.form-input {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238892a6' d='M3 5l3 3 3-3'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-inline-end: 28px;
}

.form-textarea {
    resize: vertical;
    min-height: 64px;
}

.form-submit {
    padding: 10px 20px;
    background: var(--color-accent);
    color: var(--color-bg);
    font-size: var(--font-size-base);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
    margin-block-start: 4px;
}

.form-submit:hover {
    background: var(--color-accent-hover);
}

.form-submit:active {
    transform: scale(0.98);
}

/* Login-specific */
.login-error {
    padding: 8px 12px;
    background: var(--color-red-bg);
    color: var(--color-red);
    border: 1px solid rgba(248, 113, 113, 0.2);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.login-error[hidden] {
    display: none;
}

.login-hint {
    text-align: center;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-block-start: -4px;
}

/* --- Toast Notification --- */
.toast {
    position: fixed;
    inset-block-end: 24px;
    inset-inline-start: 50%;
    transform: translateX(-50%) translateY(20px);
    z-index: 3000;
    padding: 10px 20px;
    background: var(--color-surface-elevated);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-panel);
    font-size: var(--font-size-sm);
    font-weight: 500;
    opacity: 0;
    transition: opacity var(--transition-normal), transform var(--transition-normal);
    pointer-events: none;
}

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

/* --- Scrollbar --- */
.detail-panel::-webkit-scrollbar,
.modal::-webkit-scrollbar {
    width: 6px;
}

.detail-panel::-webkit-scrollbar-track,
.modal::-webkit-scrollbar-track {
    background: transparent;
}

.detail-panel::-webkit-scrollbar-thumb,
.modal::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

/* --- Floating Gradient Orbs --- */
@keyframes orbFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-25px) rotate(3deg); }
}

.orb-container {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
}

.orb {
    position: absolute;
    border-radius: 9999px;
    filter: blur(100px);
    pointer-events: none;
    will-change: transform;
}

.orb-1 {
    width: 500px; height: 500px;
    background: var(--color-accent);
    opacity: 0.035;
    top: -200px; right: -180px;
    animation: orbFloat 8s ease-in-out infinite;
}

.orb-2 {
    width: 350px; height: 350px;
    background: var(--color-green);
    opacity: 0.025;
    bottom: -120px; left: -100px;
    animation: orbFloat 10s ease-in-out infinite;
    animation-delay: -3s;
}

.orb-3 {
    width: 280px; height: 280px;
    background: var(--color-orange);
    opacity: 0.02;
    top: 40%; left: 30%;
    animation: orbFloat 12s ease-in-out infinite;
    animation-delay: -6s;
}

/* --- Entrance Animations --- */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.85); }
    to   { opacity: 1; transform: scale(1); }
}

.animate-fade-up,
.animate-scale-in {
    opacity: 0;
    transition: opacity 500ms var(--ease-out), transform 500ms var(--ease-out);
}

.animate-fade-up { transform: translateY(20px); }
.animate-scale-in { transform: scale(0.85); }

.animate-fade-up.is-visible,
.animate-scale-in.is-visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* Detail panel injected content animations */
.detail-hero.animate-in { animation: scaleIn 450ms var(--ease-out) both; }
.detail-reading.animate-in { animation: fadeUp 400ms var(--ease-out) both; animation-delay: 80ms; }
.detail-meta-item.animate-in { animation: fadeUp 400ms var(--ease-out) both; }
.detail-notes.animate-in { animation: fadeUp 400ms var(--ease-out) both; }
.history-entry.animate-in { animation: fadeUp 350ms var(--ease-out) both; }

/* Modal form entrance */
.modal-overlay.is-open .modal-form .form-group,
.modal-overlay.is-open .modal-form .form-row,
.modal-overlay.is-open .modal-form .form-submit {
    animation: fadeUp 350ms var(--ease-out) both;
}

/* --- Stagger Children --- */
.stagger-children > * {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 400ms var(--ease-out), transform 400ms var(--ease-out);
    transition-delay: calc(var(--i, 0) * 60ms);
}

.stagger-children.is-visible > *,
.stagger-children.is-staggered > * {
    opacity: 1;
    transform: translateY(0);
}

/* --- Hover Effects --- */
.hover-lift {
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.hover-lift:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

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

/* --- Responsive --- */
@media (max-width: 768px) {
    :root {
        --panel-width: calc(100vw - 24px);
    }

    .detail-panel {
        inset-inline-end: 12px;
    }

    .logo-text {
        font-size: var(--font-size-sm);
    }

    .search-wrapper {
        flex: 0 1 160px;
    }

    .header-nav {
        gap: 4px;
    }

    .nav-btn {
        padding: 6px 10px;
    }

    .nav-username {
        display: none;
    }

    .legend-overlay {
        inset-inline-start: 8px;
        inset-block-end: 20px;
    }

    .orb-1 { width: 300px; height: 300px; }
    .orb-2 { width: 200px; height: 200px; }
    .orb-3 { width: 160px; height: 160px; }

    /* Reduce backdrop-filter blur on mobile for performance */
    .site-header,
    .detail-panel,
    .legend-overlay,
    .panel-header {
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
    }

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