/*
   Toolbox design language — a deliberately distinct, utilitarian
   dark theme for /tools/* pages. Shared across every tool so new
   tools added later inherit this look for free. Plain CSS, no
   framework dependency (mirrors the main site dropping Bootstrap).
*/

:root {
    --tool-bg: #0f172a;
    --tool-surface: #1e293b;
    --tool-surface-alt: #273449;
    --tool-border: #334155;
    --tool-text: #e2e8f0;
    --tool-text-muted: #94a3b8;
    --tool-accent: #2dd4bf;
    --tool-accent-dark: #14b8a6;
    --tool-danger-bg: #450a0a;
    --tool-danger-text: #fca5a5;
    --tool-success-bg: #052e16;
    --tool-success-text: #86efac;
    --tool-info-bg: #082f49;
    --tool-info-text: #7dd3fc;
    --tool-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --tool-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--tool-font);
    background: var(--tool-bg);
    color: var(--tool-text);
    line-height: 1.6;
}

.tool-topbar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--tool-border);
}

.tool-back-link {
    color: var(--tool-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: color 0.2s ease;
}

.tool-back-link:hover {
    color: var(--tool-accent);
}

.tool-page-container {
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

.tool-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.tool-header h1 {
    font-size: 1.9rem;
    font-weight: 700;
    color: var(--tool-accent);
    margin: 0 0 0.5rem;
}

.tool-header p {
    color: var(--tool-text-muted);
    font-size: 0.9rem;
    max-width: 620px;
    margin: 0 auto;
}

.tool-panel {
    background: var(--tool-surface);
    border: 1px solid var(--tool-border);
    border-radius: 0.75rem;
    padding: 1.25rem;
}

.tool-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1rem;
}

.tool-row > .tool-panel {
    flex: 1 1 260px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

#dropArea,
#chooseFileArea {
    border: 2px dashed var(--tool-border);
    border-radius: 0.6rem;
    padding: 1.5rem;
    text-align: center;
    height: 10rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

#dropArea p,
#chooseFileArea p {
    color: var(--tool-text-muted);
    margin: 0;
}

#dropArea.highlight {
    border-color: var(--tool-accent);
    background: rgba(45, 212, 191, 0.08);
}

.tool-file-label {
    cursor: pointer;
    color: var(--tool-accent);
    font-weight: 600;
    padding: 0.6rem 1.2rem;
    border-radius: 0.5rem;
    background: var(--tool-surface-alt);
    border: 1px solid var(--tool-border);
    transition: background 0.2s ease;
}

.tool-file-label:hover {
    background: var(--tool-border);
}

.tool-field label {
    display: block;
    font-size: 0.85rem;
    color: var(--tool-text-muted);
    margin-bottom: 0.5rem;
}

.tool-select,
.tool-input {
    width: 100%;
    padding: 0.6rem 0.75rem;
    background: var(--tool-surface-alt);
    border: 1px solid var(--tool-border);
    color: var(--tool-text);
    border-radius: 0.5rem;
    font-size: 0.9rem;
}

.tool-select:focus,
.tool-input:focus {
    outline: none;
    border-color: var(--tool-accent);
}

#mainCard {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

#conversionControls {
    flex: 1 1 260px;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    align-items: center;
    justify-content: center;
}

#additionalOptionsCard {
    flex: 2 1 400px;
    overflow-x: auto;
}

.action-button-base {
    background: var(--tool-accent);
    color: #06251f;
    width: 100%;
    max-width: 20rem;
    font-weight: 700;
    padding: 0.65rem 1rem;
    border-radius: 0.6rem;
    outline: none;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease, opacity 0.3s ease;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
}

.action-button-base:hover {
    background: var(--tool-accent-dark);
    transform: scale(1.03);
}

.action-button-base:focus {
    box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.4);
}

.action-button-base:disabled {
    cursor: not-allowed;
}

.opacity-0 { opacity: 0; }
.opacity-10 { opacity: 0.1; }
.opacity-100 { opacity: 1; }
.invisible { visibility: hidden; }
.visible { visibility: visible; }
.pointer-events-none { pointer-events: none; }
.pointer-events-auto { pointer-events: auto; }
.transition-opacity { transition: opacity 0.3s ease-in-out; }
.hidden { display: none !important; }

#fileNameDisplay {
    padding: 1rem;
    background: var(--tool-surface-alt);
    border: 2px dashed var(--tool-border);
    border-radius: 0.6rem;
    text-align: center;
    color: var(--tool-text);
    font-weight: 500;
}

#messageBox {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    text-align: center;
    min-height: 2.75rem;
}

#messageBox.bg-red-100 { background: var(--tool-danger-bg); }
#messageBox.text-red-700 { color: var(--tool-danger-text); }
#messageBox.bg-green-100 { background: var(--tool-success-bg); }
#messageBox.text-green-700 { color: var(--tool-success-text); }
#messageBox.bg-blue-100 { background: var(--tool-info-bg); }
#messageBox.text-blue-700 { color: var(--tool-info-text); }

.tool-details {
    margin-top: 1.5rem;
    padding: 1rem 1.25rem;
    border-radius: 0.6rem;
}

.tool-details summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--tool-accent);
    display: flex;
    align-items: center;
    justify-content: space-between;
    list-style: none;
}

.tool-details summary::-webkit-details-marker {
    display: none;
}

.tool-eyebrow {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--tool-text-muted);
    margin-bottom: 0.5rem;
}

.tool-details-body {
    margin-top: 1rem;
    color: var(--tool-text-muted);
    font-size: 0.9rem;
}

.tool-details-body h3 {
    color: var(--tool-accent);
    font-size: 1.05rem;
    margin: 1rem 0 0.4rem;
}

.tool-details-body code {
    font-family: var(--tool-mono);
    background: var(--tool-surface-alt);
    padding: 0.1rem 0.3rem;
    border-radius: 0.25rem;
    font-size: 0.85em;
}

.tool-details-body ul,
.tool-details-body ol {
    margin: 0.4rem 0 0.75rem 1.25rem;
}

#csvPreviewContent {
    margin-top: 1rem;
    background: var(--tool-surface-alt);
    border: 1px solid var(--tool-border);
    border-radius: 0.5rem;
    padding: 1rem;
    overflow-x: auto;
}

#csvPreviewContent h3 {
    margin: 0 0 0.5rem;
    font-size: 0.95rem;
    color: var(--tool-text);
}

#previewText {
    font-family: var(--tool-mono);
    font-size: 0.8rem;
    color: var(--tool-text-muted);
}

.tool-chevron {
    width: 1.1rem;
    height: 1.1rem;
    color: var(--tool-accent);
    transition: transform 0.2s ease;
}

.tool-details[open] .tool-chevron {
    transform: rotate(180deg);
}

#loadingIndicator {
    text-align: center;
    margin-top: 1rem;
    color: var(--tool-accent);
    font-weight: 500;
}

.spinner {
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-left-color: var(--tool-accent);
    border-radius: 50%;
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
    display: inline-block;
    vertical-align: middle;
    margin-right: 8px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@media (max-width: 700px) {
    .tool-row > .tool-panel { flex: 1 1 100%; }
    #mainCard { flex-direction: column; }
}