/* Student Toolkit shared styles — reused across all /student-tools pages.
   Namespaced with an "stt-" prefix so nothing here collides with the rest of the site's CSS. */

:root {
    --stt-primary: #4f46e5;
    --stt-primary-dark: #4338ca;
    --stt-primary-light: #eef2ff;
    --stt-text: #1e2432;
    --stt-muted: #6b7280;
    --stt-border: #e5e7eb;
    --stt-success: #16a34a;
    --stt-success-bg: #f0fdf4;
    --stt-danger: #dc2626;
    --stt-danger-bg: #fef2f2;
    --stt-warning: #d97706;
    --stt-warning-bg: #fffbeb;
    --stt-radius: 16px;
}

.stt-wrap { max-width: 1040px; margin: 0 auto; padding: 0 15px 60px; }
.stt-wrap.stt-wrap-narrow { max-width: 720px; }

/* The site's fixed top header bar (.appHeader, 56px on mobile) sits over page content with
   nothing pushing it down, so every Student Tools page needs top clearance here. */
.stt-heading { text-align: center; margin: 8px 0 4px; padding-top: 76px; }
.stt-heading h1 { font-weight: 800; font-size: 2rem; color: var(--stt-text); margin: 0; }
.stt-heading p { color: var(--stt-muted); font-size: 0.95rem; margin: 8px auto 0; max-width: 640px; }
.stt-heading .stt-tagline {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--stt-primary);
    background: var(--stt-primary-light);
    padding: 5px 14px;
    border-radius: 20px;
    margin-bottom: 10px;
}

.stt-breadcrumb {
    text-align: center;
    font-size: 0.8rem;
    color: var(--stt-muted);
    margin-top: 4px;
}
.stt-breadcrumb a { color: var(--stt-muted); text-decoration: none; }
.stt-breadcrumb a:hover { color: var(--stt-primary); text-decoration: underline; }
.stt-breadcrumb span.sep { margin: 0 6px; }

.stt-tool-menu { display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; margin: 18px 0 0; }
.stt-tool-menu a {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 14px; border-radius: 20px;
    background: #fff; border: 1px solid var(--stt-border);
    color: var(--stt-muted); font-size: 0.8rem; font-weight: 600; text-decoration: none;
}
.stt-tool-menu a.is-current { background: var(--stt-primary-light); border-color: var(--stt-primary); color: var(--stt-primary); }
.stt-tool-menu a:hover { color: var(--stt-primary); text-decoration: none; }

.stt-card {
    background: #fff;
    border: 1px solid var(--stt-border);
    border-radius: var(--stt-radius);
    box-shadow: 0 4px 24px rgba(17, 24, 39, 0.06);
    padding: 32px;
    margin-top: 24px;
}
@media (max-width: 576px) {
    .stt-card { padding: 20px; }
}

.stt-tabs { display: flex; gap: 6px; flex-wrap: wrap; background: #f3f4f6; padding: 4px; border-radius: 10px; margin-bottom: 22px; }
.stt-tab-btn {
    flex: 1; min-width: 120px;
    border: none; background: transparent;
    padding: 9px 10px; border-radius: 8px;
    font-size: 0.83rem; font-weight: 700; color: var(--stt-muted);
    cursor: pointer; transition: all 0.15s ease;
}
.stt-tab-btn.is-active { background: #fff; color: var(--stt-primary); box-shadow: 0 1px 4px rgba(17,24,39,0.12); }
.stt-tab-panel { display: none; }
.stt-tab-panel.is-active { display: block; }

.stt-field { margin-bottom: 16px; }
.stt-field label { display: block; font-weight: 700; font-size: 0.83rem; color: var(--stt-text); margin-bottom: 7px; }
.stt-field label small { font-weight: 500; color: var(--stt-muted); }
.stt-field input[type="text"], .stt-field input[type="number"], .stt-field select {
    width: 100%; padding: 10px 13px;
    border: 1.5px solid var(--stt-border); border-radius: 10px;
    font-size: 0.92rem; color: var(--stt-text); background: #fff;
}
.stt-field input:focus, .stt-field select:focus {
    outline: none; border-color: var(--stt-primary); box-shadow: 0 0 0 3px var(--stt-primary-light);
}
.stt-field-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
@media (max-width: 576px) { .stt-field-row { grid-template-columns: 1fr; } }

.stt-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 7px;
    border: none; border-radius: 10px;
    font-size: 0.95rem; font-weight: 700;
    padding: 12px 22px; cursor: pointer;
    transition: transform 0.1s ease, box-shadow 0.15s ease;
}
.stt-btn-primary {
    background: linear-gradient(135deg, var(--stt-primary), var(--stt-primary-dark));
    color: #fff; box-shadow: 0 8px 20px -6px rgba(79, 70, 229, 0.55);
}
.stt-btn-primary:hover { transform: translateY(-1px); color: #fff; }
.stt-btn-outline { background: #fff; border: 1.5px solid var(--stt-border); color: var(--stt-muted); }
.stt-btn-outline:hover { border-color: var(--stt-primary); color: var(--stt-primary); }

.stt-error {
    display: none; background: var(--stt-danger-bg); color: var(--stt-danger);
    border: 1px solid #fecaca; border-radius: 10px;
    padding: 10px 14px; font-size: 0.85rem; font-weight: 600; margin: 16px 0;
}
.stt-error.is-visible { display: block; }

.stt-result-banner {
    display: none;
    text-align: center;
    background: var(--stt-primary-light);
    border-radius: 14px;
    padding: 22px 16px;
    margin: 20px 0;
}
.stt-result-banner.is-visible { display: block; }
.stt-result-banner .stt-result-value { font-size: 2rem; font-weight: 800; color: var(--stt-primary-dark); line-height: 1.3; }
.stt-result-banner .stt-result-sub { font-size: 0.82rem; color: var(--stt-muted); margin-top: 4px; }
.stt-result-banner .stt-result-formula { font-size: 0.78rem; color: var(--stt-muted); margin-top: 8px; font-family: 'SFMono-Regular', Consolas, monospace; }

.stt-stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 18px 0; }
@media (max-width: 576px) { .stt-stats-grid { grid-template-columns: repeat(2, 1fr); } }
.stt-stat-card { border: 1px solid var(--stt-border); border-radius: 12px; padding: 14px 10px; text-align: center; }
.stt-stat-card .stt-stat-value { font-size: 1.15rem; font-weight: 800; color: var(--stt-text); }
.stt-stat-card .stt-stat-label { font-size: 0.72rem; color: var(--stt-muted); margin-top: 2px; }

.stt-progress { height: 12px; border-radius: 20px; background: #f3f4f6; overflow: hidden; margin-top: 10px; }
.stt-progress-bar { height: 100%; border-radius: 20px; background: var(--stt-primary); transition: width 0.3s ease, background 0.3s ease; }
.stt-progress-bar.is-danger { background: var(--stt-danger); }
.stt-progress-bar.is-success { background: var(--stt-success); }

.stt-history { margin-top: 22px; }
.stt-history-title { font-weight: 700; font-size: 0.85rem; color: var(--stt-text); margin-bottom: 10px; display: flex; justify-content: space-between; align-items: center; }
.stt-history-title button { border: none; background: none; color: var(--stt-muted); font-size: 0.78rem; cursor: pointer; font-weight: 600; }
.stt-history-title button:hover { color: var(--stt-danger); }
.stt-history-list { list-style: none; margin: 0; padding: 0; max-height: 220px; overflow-y: auto; }
.stt-history-list li {
    display: flex; justify-content: space-between; gap: 10px;
    padding: 9px 12px; border-radius: 8px; font-size: 0.82rem; color: var(--stt-muted);
    border-bottom: 1px solid var(--stt-border);
}
.stt-history-list li:last-child { border-bottom: none; }
.stt-history-list .stt-history-value { font-weight: 700; color: var(--stt-text); }
.stt-history-empty { font-size: 0.82rem; color: var(--stt-muted); text-align: center; padding: 14px 0; }

.stt-table-wrap { overflow-x: auto; margin-top: 4px; }
.stt-subject-table { width: 100%; border-collapse: collapse; min-width: 560px; }
.stt-subject-table th {
    text-align: left; font-size: 0.75rem; font-weight: 700; color: var(--stt-muted);
    text-transform: uppercase; letter-spacing: 0.3px; padding: 8px 10px; border-bottom: 2px solid var(--stt-border);
}
.stt-subject-table td { padding: 6px 10px; vertical-align: middle; }
.stt-subject-table input, .stt-subject-table select {
    width: 100%; padding: 8px 10px; border: 1.5px solid var(--stt-border); border-radius: 8px; font-size: 0.88rem;
}
.stt-subject-table input:focus, .stt-subject-table select:focus { outline: none; border-color: var(--stt-primary); }
.stt-row-remove { border: none; background: var(--stt-danger-bg); color: var(--stt-danger); width: 32px; height: 32px; border-radius: 8px; cursor: pointer; }
.stt-row-remove:hover { background: var(--stt-danger); color: #fff; }

.stt-notes {
    margin: 24px 0 0; padding: 16px 18px; background: #f9fafb; border-radius: 10px;
    font-size: 0.83rem; color: var(--stt-muted); line-height: 1.7;
}
.stt-notes ol, .stt-notes ul { margin: 0; padding-left: 18px; }

/* ---- SEO content block (What is / How to use / Benefits / FAQ) ---- */
.stt-seo-content { margin-top: 34px; }
.stt-seo-content h2 { font-size: 1.3rem; font-weight: 800; color: var(--stt-text); margin: 28px 0 12px; }
.stt-seo-content h2:first-child { margin-top: 0; }
.stt-seo-content p { font-size: 0.95rem; line-height: 1.75; color: var(--stt-muted); margin: 0 0 14px; }
.stt-seo-content ol, .stt-seo-content ul { font-size: 0.95rem; line-height: 1.75; color: var(--stt-muted); margin: 0 0 14px; padding-left: 20px; }
.stt-seo-content li { margin-bottom: 6px; }
.stt-faq-item { border-bottom: 1px solid var(--stt-border); padding: 14px 0; }
.stt-faq-item:last-child { border-bottom: none; }
.stt-faq-item summary { font-weight: 700; font-size: 0.95rem; color: var(--stt-text); cursor: pointer; list-style: none; position: relative; padding-right: 26px; }
.stt-faq-item summary::-webkit-details-marker { display: none; }
.stt-faq-item summary::after { content: '+'; position: absolute; right: 0; top: 0; font-size: 1.2rem; color: var(--stt-primary); }
.stt-faq-item[open] summary::after { content: '\2212'; }
.stt-faq-item p { margin: 10px 0 0; }

/* ---- Landing page: categories, tool cards, search ---- */
.stt-hero-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-top: 20px; }

.stt-search-wrap { max-width: 560px; margin: 26px auto 0; position: relative; }
.stt-search-wrap input {
    width: 100%; padding: 13px 44px; border: 1.5px solid var(--stt-border); border-radius: 30px;
    font-size: 0.95rem; color: var(--stt-text); box-shadow: 0 4px 16px rgba(17,24,39,0.05);
}
.stt-search-wrap input:focus { outline: none; border-color: var(--stt-primary); box-shadow: 0 0 0 3px var(--stt-primary-light); }
.stt-search-wrap .stt-search-icon { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: var(--stt-muted); }
.stt-search-wrap .stt-search-kbd {
    position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
    font-size: 0.72rem; font-weight: 700; color: var(--stt-muted);
    background: #f3f4f6; border: 1px solid var(--stt-border); border-radius: 6px; padding: 3px 7px;
}
.stt-search-results {
    position: absolute; left: 0; right: 0; top: calc(100% + 8px);
    background: #fff; border: 1px solid var(--stt-border); border-radius: 14px;
    box-shadow: 0 12px 32px rgba(17,24,39,0.14);
    max-height: 360px; overflow-y: auto; z-index: 50; display: none; text-align: left;
}
.stt-search-results.is-open { display: block; }
.stt-search-results a {
    display: flex; align-items: center; gap: 12px;
    padding: 12px 16px; text-decoration: none; color: var(--stt-text);
    border-bottom: 1px solid var(--stt-border);
}
.stt-search-results a:last-child { border-bottom: none; }
.stt-search-results a:hover { background: var(--stt-primary-light); }
.stt-search-results .stt-sr-icon { width: 34px; height: 34px; min-width: 34px; border-radius: 8px; background: var(--stt-primary-light); color: var(--stt-primary); display: flex; align-items: center; justify-content: center; }
.stt-search-results .stt-sr-name { font-weight: 700; font-size: 0.88rem; }
.stt-search-results .stt-sr-cat { font-size: 0.76rem; color: var(--stt-muted); }
.stt-search-empty { padding: 18px; text-align: center; color: var(--stt-muted); font-size: 0.85rem; }

.stt-category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 30px; }
@media (max-width: 900px) { .stt-category-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 576px) { .stt-category-grid { grid-template-columns: 1fr; } }

.stt-category-card {
    background: #fff; border: 1px solid var(--stt-border); border-radius: var(--stt-radius);
    padding: 24px; box-shadow: 0 4px 20px rgba(17,24,39,0.05);
    display: flex; flex-direction: column;
}
.stt-category-card .stt-cat-icon {
    width: 46px; height: 46px; border-radius: 12px;
    background: var(--stt-primary-light); color: var(--stt-primary);
    display: flex; align-items: center; justify-content: center; font-size: 1.25rem;
    margin-bottom: 14px;
}
.stt-category-card h3 { font-size: 1.05rem; font-weight: 800; color: var(--stt-text); margin: 0 0 6px; }
.stt-category-card p { font-size: 0.85rem; color: var(--stt-muted); margin: 0 0 14px; flex-grow: 1; }
.stt-category-card .stt-cat-count { font-size: 0.76rem; font-weight: 700; color: var(--stt-primary); margin-bottom: 12px; }
.stt-category-card.is-soon { opacity: 0.65; }
.stt-category-card.is-soon .stt-cat-count { color: var(--stt-muted); }

.stt-category-tools { list-style: none; margin: 0 0 16px; padding: 0; }
.stt-category-tools li { margin-bottom: 6px; }
.stt-category-tools a { font-size: 0.86rem; color: var(--stt-text); text-decoration: none; display: flex; align-items: center; gap: 6px; }
.stt-category-tools a:hover { color: var(--stt-primary); }
.stt-category-tools a i { font-size: 0.75rem; color: var(--stt-muted); }

.stt-badge-soon {
    display: inline-block; font-size: 0.68rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.3px; background: #f3f4f6; color: var(--stt-muted);
    padding: 3px 8px; border-radius: 6px; margin-bottom: 10px; align-self: flex-start;
}

/* ---- Shared upload dropzone (Resume Score, and any future upload-based tool) ---- */
.stt-dropzone {
    border: 2px dashed var(--stt-border); border-radius: 14px;
    padding: 34px 18px; text-align: center; cursor: pointer;
    transition: border-color 0.15s ease, background 0.15s ease;
}
.stt-dropzone:hover, .stt-dropzone.is-dragover { border-color: var(--stt-primary); background: var(--stt-primary-light); }
.stt-dropzone i { font-size: 2rem; color: var(--stt-primary); }
.stt-dropzone h5 { margin: 10px 0 4px; font-weight: 700; color: var(--stt-text); }
.stt-dropzone p { margin: 0; font-size: 0.82rem; color: var(--stt-muted); }
.stt-dropzone input[type="file"] { display: none; }
.stt-file-chip {
    display: inline-flex; align-items: center; gap: 10px;
    background: var(--stt-primary-light); color: var(--stt-primary-dark);
    border-radius: 10px; padding: 10px 14px; font-size: 0.85rem; font-weight: 600; margin-top: 14px;
}
.stt-file-chip button { border: none; background: none; color: var(--stt-danger); cursor: pointer; font-size: 1rem; line-height: 1; }

/* ---- Resume Score gauge + category breakdown ---- */
.stt-score-gauge {
    width: 160px; height: 160px; border-radius: 50%; margin: 0 auto 14px;
    display: flex; align-items: center; justify-content: center;
    background: conic-gradient(var(--stt-gauge-color, var(--stt-primary)) calc(var(--stt-score, 0) * 3.6deg), #f3f4f6 0);
}
.stt-score-gauge-inner {
    width: 128px; height: 128px; border-radius: 50%; background: #fff;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    box-shadow: inset 0 0 0 1px var(--stt-border);
}
.stt-score-gauge-inner .stt-score-number { font-size: 2.1rem; font-weight: 800; color: var(--stt-text); line-height: 1; }
.stt-score-gauge-inner .stt-score-outof { font-size: 0.78rem; color: var(--stt-muted); margin-top: 2px; }
.stt-score-label { text-align: center; font-size: 0.9rem; font-weight: 700; margin-bottom: 4px; }
.stt-score-tag {
    display: block; text-align: center; font-size: 0.78rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.4px; margin-bottom: 22px;
}

.stt-cat-bars { display: flex; flex-direction: column; gap: 14px; margin: 20px 0; }
.stt-cat-bar-row .stt-cat-bar-head { display: flex; justify-content: space-between; font-size: 0.85rem; margin-bottom: 6px; }
.stt-cat-bar-row .stt-cat-bar-head span:first-child { font-weight: 700; color: var(--stt-text); }
.stt-cat-bar-row .stt-cat-bar-head span:last-child { color: var(--stt-muted); }

.stt-two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 10px; }
@media (max-width: 700px) { .stt-two-col { grid-template-columns: 1fr; } }

.stt-pill-list-title { display: flex; align-items: center; gap: 7px; font-weight: 700; font-size: 0.9rem; margin-bottom: 10px; }
.stt-pill-list-title i { width: 16px; }
.stt-pill-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.stt-pill-list li {
    display: flex; align-items: flex-start; gap: 8px;
    font-size: 0.85rem; color: var(--stt-text); line-height: 1.5;
    padding: 9px 12px; border-radius: 8px;
}
.stt-pill-list.is-good li { background: var(--stt-success-bg); }
.stt-pill-list.is-bad li { background: var(--stt-danger-bg); }
.stt-pill-list.is-info li { background: var(--stt-primary-light); }
.stt-pill-list li i { margin-top: 2px; flex-shrink: 0; }
.stt-pill-list.is-good li i { color: var(--stt-success); }
.stt-pill-list.is-bad li i { color: var(--stt-danger); }
.stt-pill-list.is-info li i { color: var(--stt-primary); }

.stt-keyword-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }
.stt-keyword-chips span { background: #f3f4f6; color: var(--stt-text); font-size: 0.78rem; font-weight: 600; padding: 5px 11px; border-radius: 20px; }
.stt-keyword-chips span.is-missing { background: var(--stt-danger-bg); color: var(--stt-danger); }

.stt-toast {
    position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%) translateY(20px);
    background: var(--stt-text); color: #fff; font-size: 0.85rem; font-weight: 600;
    padding: 12px 20px; border-radius: 10px; box-shadow: 0 12px 32px rgba(17,24,39,0.25);
    opacity: 0; pointer-events: none; transition: opacity 0.2s ease, transform 0.2s ease; z-index: 500;
}
.stt-toast.is-visible { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---- Cover Letter Maker ---- */
.stt-cl-preview {
    background: #fff; border: 1px solid var(--stt-border); border-radius: 12px;
    padding: 28px; font-size: 0.88rem; line-height: 1.8; color: var(--stt-text);
    white-space: pre-wrap; min-height: 300px;
}
.stt-tone-row { display: flex; gap: 8px; flex-wrap: wrap; }
.stt-tone-row button {
    border: 1.5px solid var(--stt-border); background: #fff; color: var(--stt-muted);
    padding: 7px 14px; border-radius: 20px; font-size: 0.8rem; font-weight: 700; cursor: pointer;
}
.stt-tone-row button.is-active { background: var(--stt-primary-light); border-color: var(--stt-primary); color: var(--stt-primary); }

/* ---- Exam Countdown ---- */
.stt-exam-list { display: flex; flex-direction: column; gap: 14px; margin-top: 20px; }
.stt-exam-card {
    border: 1px solid var(--stt-border); border-radius: 14px; padding: 18px;
    display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.stt-exam-card.is-past { opacity: 0.55; }
.stt-exam-card.is-soon { border-color: var(--stt-danger); background: var(--stt-danger-bg); }
.stt-exam-info h4 { margin: 0 0 3px; font-size: 1rem; font-weight: 800; color: var(--stt-text); }
.stt-exam-info p { margin: 0; font-size: 0.8rem; color: var(--stt-muted); }
.stt-countdown-nums { display: flex; gap: 8px; }
.stt-countdown-nums div { text-align: center; background: var(--stt-primary-light); border-radius: 10px; padding: 8px 10px; min-width: 54px; }
.stt-countdown-nums div span { display: block; font-size: 1.15rem; font-weight: 800; color: var(--stt-primary-dark); }
.stt-countdown-nums div small { font-size: 0.65rem; color: var(--stt-muted); text-transform: uppercase; }
.stt-exam-actions { display: flex; gap: 6px; }
.stt-exam-actions button { border: none; width: 32px; height: 32px; border-radius: 8px; cursor: pointer; background: #f3f4f6; color: var(--stt-muted); }
.stt-exam-actions button:hover { background: var(--stt-primary-light); color: var(--stt-primary); }
.stt-exam-actions button.stt-exam-delete:hover { background: var(--stt-danger-bg); color: var(--stt-danger); }
.stt-exam-actions button.stt-exam-complete:hover { background: var(--stt-success-bg); color: var(--stt-success); }

/* ---- Study Timer ---- */
.stt-timer-page { text-align: center; }
.stt-timer-mode-row { display: flex; justify-content: center; gap: 8px; margin-bottom: 26px; flex-wrap: wrap; }
.stt-timer-mode-row button {
    border: 1.5px solid var(--stt-border); background: #fff; color: var(--stt-muted);
    padding: 8px 16px; border-radius: 20px; font-size: 0.82rem; font-weight: 700; cursor: pointer;
}
.stt-timer-mode-row button.is-active { background: var(--stt-primary-light); border-color: var(--stt-primary); color: var(--stt-primary); }
.stt-timer-ring {
    width: 240px; height: 240px; border-radius: 50%; margin: 0 auto 26px;
    display: flex; align-items: center; justify-content: center;
    background: conic-gradient(var(--stt-primary) calc(var(--stt-timer-pct, 0) * 1%), #f3f4f6 0);
    transition: background 0.4s linear;
}
.stt-timer-ring-inner {
    width: 204px; height: 204px; border-radius: 50%; background: #fff;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    box-shadow: inset 0 0 0 1px var(--stt-border);
}
.stt-timer-ring-inner .stt-timer-time { font-size: 2.6rem; font-weight: 800; color: var(--stt-text); font-variant-numeric: tabular-nums; }
.stt-timer-ring-inner .stt-timer-session { font-size: 0.8rem; color: var(--stt-muted); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.4px; }
.stt-timer-controls { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.stt-timer-controls button {
    border: none; border-radius: 10px; padding: 12px 22px; font-size: 0.9rem; font-weight: 700; cursor: pointer;
}
.stt-timer-controls .stt-timer-start { background: linear-gradient(135deg, var(--stt-primary), var(--stt-primary-dark)); color: #fff; }
.stt-timer-controls .stt-timer-secondary { background: #f3f4f6; color: var(--stt-text); }
.stt-fullscreen-toggle {
    position: absolute; top: 14px; right: 14px; border: none; background: #f3f4f6; color: var(--stt-muted);
    width: 34px; height: 34px; border-radius: 8px; cursor: pointer;
}
.stt-timer-durations { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 24px; text-align: left; }
@media (max-width: 576px) { .stt-timer-durations { grid-template-columns: 1fr; } }

/* ---- Timetable Maker ---- */
.stt-timetable-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 10px; margin-top: 20px; }
@media (max-width: 900px) { .stt-timetable-grid { grid-template-columns: 1fr; } }
.stt-timetable-day { border: 1px solid var(--stt-border); border-radius: 12px; padding: 12px; min-height: 90px; }
.stt-timetable-day h5 { margin: 0 0 10px; font-size: 0.85rem; font-weight: 800; color: var(--stt-text); text-align: center; }
.stt-timetable-entry {
    background: var(--stt-primary-light); border-radius: 8px; padding: 8px 10px; margin-bottom: 8px;
    font-size: 0.76rem; color: var(--stt-text); cursor: grab; position: relative;
}
.stt-timetable-entry.is-dragging { opacity: 0.4; }
.stt-timetable-entry strong { display: block; font-size: 0.8rem; }
.stt-timetable-entry span { display: block; color: var(--stt-muted); margin-top: 2px; }
.stt-timetable-entry .stt-tt-remove {
    position: absolute; top: 4px; right: 4px; border: none; background: none; color: var(--stt-muted); cursor: pointer; font-size: 0.8rem;
}
.stt-timetable-entry .stt-tt-remove:hover { color: var(--stt-danger); }
.stt-timetable-empty { font-size: 0.72rem; color: var(--stt-muted); text-align: center; padding: 10px 0; }

/* ---- Image Compressor / Resize / Signature / PDF<->Word (shared) ---- */
.stt-slider-row { display: flex; align-items: center; gap: 14px; }
.stt-slider-row input[type="range"] { flex: 1; accent-color: var(--stt-primary); }
.stt-slider-row .stt-slider-value { min-width: 52px; text-align: right; font-weight: 700; font-size: 0.88rem; color: var(--stt-primary-dark); }

.stt-file-list { display: flex; flex-direction: column; gap: 12px; margin-top: 18px; }
.stt-file-row {
    display: flex; align-items: center; gap: 14px; border: 1px solid var(--stt-border);
    border-radius: 12px; padding: 12px 14px; flex-wrap: wrap;
}
.stt-file-row img.stt-file-thumb { width: 56px; height: 56px; object-fit: cover; border-radius: 8px; flex-shrink: 0; background: #f3f4f6; }
.stt-file-row .stt-file-meta { flex: 1; min-width: 140px; }
.stt-file-row .stt-file-meta strong { display: block; font-size: 0.85rem; color: var(--stt-text); word-break: break-all; }
.stt-file-row .stt-file-meta span { font-size: 0.76rem; color: var(--stt-muted); }
.stt-file-row .stt-file-meta span.is-smaller { color: var(--stt-success); font-weight: 700; }
.stt-file-row .stt-file-row-actions { display: flex; gap: 8px; }

.stt-checkbox-row { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: var(--stt-text); margin-bottom: 16px; cursor: pointer; }
.stt-checkbox-row input { width: 16px; height: 16px; accent-color: var(--stt-primary); }

.stt-canvas-stage {
    position: relative; border: 1px solid var(--stt-border); border-radius: 12px; overflow: hidden;
    background: repeating-conic-gradient(#f3f4f6 0% 25%, #fff 0% 50%) 50% / 20px 20px;
    max-width: 100%; margin-top: 16px; touch-action: none;
}
.stt-canvas-stage canvas { display: block; max-width: 100%; height: auto; }
.stt-canvas-stage.is-empty { display: flex; align-items: center; justify-content: center; min-height: 220px; color: var(--stt-muted); font-size: 0.85rem; }

.stt-sig-pad-wrap { border: 1.5px dashed var(--stt-border); border-radius: 12px; }
.stt-sig-pad-wrap canvas { display: block; width: 100%; height: 160px; cursor: crosshair; touch-action: none; }
.stt-sig-mode-row { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }
.stt-sig-mode-row button {
    border: 1.5px solid var(--stt-border); background: #fff; color: var(--stt-muted);
    padding: 7px 14px; border-radius: 20px; font-size: 0.8rem; font-weight: 700; cursor: pointer;
}
.stt-sig-mode-row button.is-active { background: var(--stt-primary-light); border-color: var(--stt-primary); color: var(--stt-primary); }
.stt-sig-type-input { font-family: 'Brush Script MT', cursive; font-size: 2.2rem; text-align: center; }

/* ---- QR Generator ---- */
.stt-qr-preview {
    display: flex; align-items: center; justify-content: center;
    background: #fff; border: 1px solid var(--stt-border); border-radius: 14px;
    padding: 20px; margin-top: 18px; min-height: 240px;
}
.stt-qr-preview.is-empty { color: var(--stt-muted); font-size: 0.85rem; }

/* ---- Typing Test ---- */
.stt-typing-box {
    border: 1px solid var(--stt-border); border-radius: 14px; padding: 22px;
    font-family: 'SFMono-Regular', Consolas, monospace; font-size: 1.05rem; line-height: 1.9;
    color: var(--stt-muted); user-select: none; background: #fff;
}
.stt-typing-box span.is-correct { color: var(--stt-success); }
.stt-typing-box span.is-incorrect { color: var(--stt-danger); background: var(--stt-danger-bg); border-radius: 2px; }
.stt-typing-box span.is-current { border-bottom: 2px solid var(--stt-primary); color: var(--stt-text); }
.stt-typing-box.is-hindi { font-family: 'Nirmala UI', 'Mangal', 'Noto Sans Devanagari', sans-serif; font-size: 1.2rem; line-height: 2.1; }
.stt-typing-hidden-input { position: absolute; opacity: 0; pointer-events: none; height: 1px; width: 1px; }
.stt-typing-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; font-size: 0.85rem; color: var(--stt-muted); }
.stt-typing-meta .stt-typing-timer { font-weight: 800; font-size: 1.2rem; color: var(--stt-primary-dark); }

/* ---- Date Calculator / Unit Converter ---- */
.stt-swap-btn {
    display: flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; border-radius: 50%; border: 1.5px solid var(--stt-border);
    background: #fff; color: var(--stt-primary); cursor: pointer; margin: 0 auto;
}
.stt-swap-btn:hover { background: var(--stt-primary-light); }

/* ---- Scientific Calculator ---- */
.stt-calc-display {
    background: #1e2432; border-radius: 14px; padding: 18px 16px; margin-bottom: 14px;
    text-align: right; overflow-x: auto;
}
.stt-calc-expr { color: #9aa4bb; font-size: 0.9rem; min-height: 1.2em; word-break: break-all; }
.stt-calc-value { color: #fff; font-size: 2rem; font-weight: 700; word-break: break-all; }
.stt-calc-mode-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.stt-calc-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.stt-calc-btn {
    border: 1.5px solid var(--stt-border); background: #fff; border-radius: 10px;
    padding: 12px 4px; font-size: 0.95rem; font-weight: 600; color: var(--stt-text);
    cursor: pointer; text-align: center;
}
.stt-calc-btn:hover { border-color: var(--stt-primary); color: var(--stt-primary); }
.stt-calc-btn.is-func { background: var(--stt-primary-light); color: var(--stt-primary-dark); font-size: 0.82rem; }
.stt-calc-btn.is-op { background: #fff3e0; color: #c2703d; }
.stt-calc-btn.is-equals { background: var(--stt-primary); color: #fff; border-color: var(--stt-primary); }
.stt-calc-btn.is-equals:hover { color: #fff; opacity: 0.9; }
.stt-calc-btn.is-clear { background: var(--stt-danger-bg); color: var(--stt-danger); }
.stt-calc-btn.is-active { background: var(--stt-primary); color: #fff; border-color: var(--stt-primary); }
.stt-calc-history { margin-top: 16px; max-height: 160px; overflow-y: auto; }
.stt-calc-history-item {
    display: flex; justify-content: space-between; gap: 10px; padding: 8px 10px;
    border-bottom: 1px solid var(--stt-border); font-size: 0.85rem;
}
.stt-calc-history-item .expr { color: var(--stt-muted); }
.stt-calc-history-item .val { font-weight: 700; color: var(--stt-text); }

/* ---- Currency Converter ---- */
.stt-currency-rate { font-size: 0.85rem; color: var(--stt-muted); margin-top: 6px; text-align: center; }
.stt-currency-updated { font-size: 0.75rem; color: var(--stt-muted); text-align: center; margin-top: 4px; }

/* ---- Binary / Decimal Converter ---- */
.stt-base-grid { display: grid; grid-template-columns: 1fr; gap: 12px; margin-top: 18px; }
.stt-base-row {
    display: flex; align-items: center; gap: 12px; border: 1px solid var(--stt-border);
    border-radius: 12px; padding: 12px 16px; background: #fff;
}
.stt-base-row label { width: 110px; font-weight: 700; font-size: 0.85rem; color: var(--stt-text); flex-shrink: 0; }
.stt-base-row input {
    flex: 1; border: none; outline: none; font-family: 'SFMono-Regular', Consolas, monospace;
    font-size: 1.05rem; color: var(--stt-primary-dark); background: transparent;
}
.stt-base-row.is-invalid { border-color: var(--stt-danger); }

@media print {
    .stt-heading, .stt-notes, #ttFormCard, .stt-tool-menu, .itp-action-row, header, footer, .appHeader { display: none !important; }
    .stt-timetable-grid { grid-template-columns: repeat(7, 1fr) !important; }
}