/* Rare Word Finder – modern styles */

/* Shared (theme-independent) */
:root {
    --radius: 10px;
    --radius-sm: 6px;
    --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* Light theme (default; also used when system prefers light) */
:root {
    --bg: #f5f5f7;
    --surface: #ffffff;
    --surface-elevated: #ebebed;
    --border: #d1d1d6;
    --text: #1d1d1f;
    --text-muted: #6e6e73;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --highlight-bg: #ffeb3b;
    --highlight-unknown-bg: #f8b4d4;
    --success: #248a48;
    --warning: #c4940e;
    --error: #c41e3a;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

/* Dark theme (when system prefers dark) */
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0f0f12;
        --surface: #1a1a1f;
        --surface-elevated: #23232a;
        --border: #2e2e36;
        --text: #e8e8ed;
        --text-muted: #9a9aa6;
        --accent: #3b82f6;
        --accent-hover: #60a5fa;
        --highlight-bg: #ae9400;
        --highlight-unknown-bg: #c45a8a;
        --success: #34c77b;
        --warning: #e6b84a;
        --error: #e65c5c;
        --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    }
}

/* Manual theme override (button toggle) */
html[data-theme="light"] {
    --bg: #f5f5f7;
    --surface: #ffffff;
    --surface-elevated: #ebebed;
    --border: #d1d1d6;
    --text: #1d1d1f;
    --text-muted: #6e6e73;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --highlight-bg: #ffeb3b;
    --highlight-unknown-bg: #f8b4d4;
    --success: #248a48;
    --warning: #c4940e;
    --error: #c41e3a;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

html[data-theme="dark"] {
    --bg: #0f0f12;
    --surface: #1a1a1f;
    --surface-elevated: #23232a;
    --border: #2e2e36;
    --text: #e8e8ed;
    --text-muted: #9a9aa6;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --highlight-bg: #978100;
    --highlight-unknown-bg: #c45a8a;
    --success: #34c77b;
    --warning: #e6b84a;
    --error: #e65c5c;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 2rem;
    padding-bottom: 5rem;
    min-height: 100vh;
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.55;
    color: var(--text);
    background: var(--bg);
}

@media (min-width: 640px) {
    body {
        padding: 2.5rem;
        padding-bottom: 5rem;
        max-width: 900px;
        margin: 0 auto;
    }
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.app-description {
    font-size: 0.95rem;
    line-height: 1.55;
    color: var(--text-muted);
    margin: 0 0 1.25rem;
    max-width: 56rem;
}

.app-description p {
    margin: 0 0 0.75rem;
}

.app-description p:last-child {
    margin-bottom: 0;
}

.app-description strong {
    color: var(--text);
}

/* Legend uses same .highlight / .highlight-unknown as in-text; only add spacing and default cursor */
.app-description .highlight {
    padding: 0 0.35em;
    cursor: default;
}

h1 {
    font-size: 1.75rem;
    font-weight: 600;
    margin: 0;
    letter-spacing: -0.02em;
}

#theme-toggle {
    padding: 0.5rem 1rem;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}

#theme-toggle:hover {
    background: var(--surface-elevated);
    border-color: var(--accent);
}

/* Status bar */
#load-status {
    margin-bottom: 1rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    border: 1px solid transparent;
}

#load-status.loading {
    background: color-mix(in srgb, var(--warning) 18%, transparent);
    color: var(--warning);
    border-color: color-mix(in srgb, var(--warning) 35%, transparent);
}

#load-status.ready {
    background: color-mix(in srgb, var(--success) 14%, transparent);
    color: var(--success);
    border-color: color-mix(in srgb, var(--success) 30%, transparent);
}

#load-status.error {
    background: color-mix(in srgb, var(--error) 14%, transparent);
    color: var(--error);
    border-color: color-mix(in srgb, var(--error) 30%, transparent);
}

#csv-file-input {
    display: none;
    margin-bottom: 1rem;
}

#csv-file-input label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

#csv-file-input input[type="file"] {
    color: var(--text);
    cursor: pointer;
}

/* Preset text dropdown */
#preset-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

#preset-container label {
    color: var(--text-muted);
    font-size: 0.9rem;
}

#text-preset {
    font-family: inherit;
    font-size: 0.95rem;
    padding: 0.5rem 2rem 0.5rem 0.75rem;
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    min-width: 12rem;
    -webkit-appearance: none;
    appearance: none;
    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='%236e6e73' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.6rem center;
    background-size: 0.75rem;
}

#text-preset:hover,
#text-preset:focus {
    border-color: var(--accent);
    outline: none;
}

/* Textarea */
#text-input {
    width: 100%;
    height: 200px;
    padding: 1rem 1.1rem;
    font-family: inherit;
    font-size: 15px;
    line-height: 1.6;
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    resize: vertical;
    margin-bottom: 1.25rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

#text-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent);
}

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

#text-input:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* Slider – fixed to bottom of viewport */
#slider-container {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    padding: 0.75rem 2rem;
    background: var(--surface);
    border-top: 1px solid var(--border);
    box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.08);
}

@media (min-width: 640px) {
    #slider-container {
        padding-left: max(2.5rem, calc((100vw - 900px) / 2 + 2.5rem));
        padding-right: max(2.5rem, calc((100vw - 900px) / 2 + 2.5rem));
    }
}

#slider-label {
    color: var(--text-muted);
    font-size: 0.9rem;
}

#num-words-slider {
    flex: 1;
    min-width: 120px;
    max-width: 280px;
    height: 8px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--surface-elevated);
    border-radius: 4px;
}

#num-words-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    transition: background 0.2s, transform 0.15s;
}

#num-words-slider::-webkit-slider-thumb:hover {
    background: var(--accent-hover);
    transform: scale(1.08);
}

#num-words-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: none;
    transition: background 0.2s, transform 0.15s;
}

#num-words-slider::-moz-range-thumb:hover {
    background: var(--accent-hover);
    transform: scale(1.08);
}

#slider-value {
    min-width: 1.8rem;
    font-weight: 600;
    color: var(--accent);
}

/* Highlighted text section */
.highlighted-heading {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0 0 1.25rem;
}

#highlighted-text {
    padding: 1rem 1.1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    white-space: pre-wrap;
    margin-bottom: 1.5rem;
    font-size: 15px;
    line-height: 1.6;
    min-height: 8rem;
    max-height: 90vh;
    overflow-y: auto;
    resize: vertical;
}

.highlight {
    background: var(--highlight-bg);
    color: var(--text);
    cursor: help;
}

/* Words not in the frequency database */
.highlight-unknown {
    background: var(--highlight-unknown-bg);
    color: var(--text);
}

.definition-tooltip {
    position: fixed;
    z-index: 1000;
    max-width: 320px;
    padding: 0.65rem 0.85rem;
    font-size: 0.875rem;
    line-height: 1.45;
    color: var(--text);
    background: var(--surface-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow);
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.15s, visibility 0.15s;
}

.definition-tooltip.visible {
    opacity: 1;
    visibility: visible;
}

.definition-tooltip .tooltip-word {
    font-weight: 600;
    margin-bottom: 0.35rem;
    color: var(--accent);
}

.definition-tooltip .tooltip-loading {
    color: var(--text-muted);
}

.definition-tooltip .tooltip-error {
    color: var(--error);
}

.definition-tooltip a.tooltip-search-link {
    display: inline-block;
    margin-top: 0.5rem;
    color: var(--accent);
    pointer-events: auto;
    cursor: pointer;
}

.definition-tooltip a.tooltip-search-link:hover {
    text-decoration: underline;
}

/* Table word cell – same definition hover/click as highlights */
#results-table .word-cell {
    cursor: help;
}

/* Table wrapper – scrollable and resizable */
.table-wrapper {
    overflow-y: auto;
    resize: vertical;
    min-height: 10rem;
    max-height: 70vh;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
}

/* Table */
#results-table {
    width: 100%;
    border-collapse: collapse;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    background: var(--surface);
}

#results-table thead {
    background: var(--surface-elevated);
}

#results-table th {
    padding: 0.85rem 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-bottom: 1px solid var(--border);
}

#results-table th a {
    color: var(--accent);
    text-decoration: none;
}

#results-table th a:hover {
    text-decoration: underline;
}

#results-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}

#results-table tbody tr:last-child td {
    border-bottom: none;
}

#results-table tbody tr:hover {
    background: color-mix(in srgb, var(--accent) 6%, var(--surface));
}

/* Words not in database */
.unknown-words-section {
    display: none;
    margin-bottom: 1.5rem;
}

.unknown-words-heading {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0 0 0.35rem;
}

.unknown-words-list {
    font-size: 0.9rem;
    color: var(--text);
    margin: 0;
    line-height: 1.5;
}

/* Load status link */
#load-status.ready a {
    color: inherit;
    text-decoration: underline;
}

#load-status.ready a:hover {
    text-decoration: none;
}

/* Footer */
.footer {
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.6;
    text-align: center;
}

.footer p {
    margin: 0 0 0.5rem;
}

.footer p:last-child {
    margin-bottom: 0;
}

.footer a {
    color: var(--accent);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

.footer-github {
    display: inline-flex;
    align-items: center;
    vertical-align: middle;
}

.footer-github:hover {
    text-decoration: none;
}

.footer-github svg {
    display: block;
}

.footer-donate {
    margin-top: 0.75rem !important;
}