.toolbox-dock {
    align-items: center;
    bottom: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    position: fixed;
    right: 1.5rem;
    z-index: 1100;
}

.dock-center,
.dock-tool {
    align-items: center;
    border: 0;
    border-radius: 50%;
    box-shadow: 0 10px 25px rgba(15, 23, 42, 0.2);
    cursor: pointer;
    display: flex;
    justify-content: center;
    position: relative;
    transition: all 0.3s ease;
}

.dock-center {
    background: var(--white);
    color: var(--primary);
    height: 56px;
    width: 56px;
}

.dock-tool {
    color: white;
    height: 44px;
    opacity: 0;
    transform: translateY(20px) scale(0.85);
    width: 44px;
}

.toolbox-dock.open .dock-tool,
.toolbox-dock:hover .dock-tool {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.dock-center:hover,
.dock-tool:hover {
    transform: translateY(-5px) scale(1.08);
}

.stopwatch-btn {
    background: linear-gradient(135deg, var(--primary), #1d4ed8);
}

.notes-btn {
    background: linear-gradient(135deg, var(--success), #047857);
}

.calculator-btn {
    background: linear-gradient(135deg, var(--purple), #6d28d9);
}

.todo-btn {
    background: linear-gradient(135deg, var(--orange), #c2410c);
}

.pomodoro-btn {
    background: linear-gradient(135deg, #d71920, #7f1d1d);
}

.converter-btn {
    background: linear-gradient(135deg, #0891b2, #155e75);
}

.formula-btn {
    background: linear-gradient(135deg, #111827, #374151);
}

.cgpa-btn {
    background: linear-gradient(135deg, #16a34a, #166534);
}

.attendance-btn {
    background: linear-gradient(135deg, #f59e0b, #92400e);
}

.tool-modal {
    background: rgba(15, 23, 42, 0.58);
    backdrop-filter: blur(8px);
    display: none;
    height: 100%;
    left: 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 2100;
}

.tool-modal.open {
    display: block;
}

.tool-modal-content {
    background: var(--white);
    border-radius: 8px;
    box-shadow: 0 25px 60px rgba(15, 23, 42, 0.3);
    color: var(--dark);
    margin: 3vh auto;
    max-height: 94vh;
    max-width: 500px;
    overflow: auto;
    padding: 1.5rem;
    position: relative;
    width: min(95%, 500px);
}

.tool-close {
    background: transparent;
    border: 0;
    border-radius: 50%;
    color: var(--gray);
    cursor: pointer;
    font-size: 1.8rem;
    height: 38px;
    position: absolute;
    right: 1rem;
    top: 1rem;
    width: 38px;
}

.tool-close:hover {
    background: rgba(100, 116, 139, 0.12);
}

.modal-header {
    margin-bottom: 1rem;
    padding-right: 2rem;
    text-align: center;
}

.modal-icon {
    color: var(--primary);
    display: block;
    font-size: 2.6rem;
    margin-bottom: 0.5rem;
}

.modal-header p {
    color: var(--gray);
    font-size: 0.95rem;
}

.stopwatch-content,
.notes-content,
.todo-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

#stopwatchDisplay {
    align-items: center;
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    border: 3px solid rgba(59, 130, 246, 0.2);
    border-radius: 8px;
    color: var(--primary);
    display: flex;
    font-family: "Courier New", monospace;
    font-size: clamp(2.2rem, 9vw, 3.2rem);
    font-weight: 800;
    justify-content: center;
    min-height: 110px;
}

.control-buttons,
.notes-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.control-btn,
.action-btn,
.add-todo-btn {
    align-items: center;
    border: 0;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    display: flex;
    flex: 1;
    font: inherit;
    font-weight: 700;
    gap: 0.4rem;
    justify-content: center;
    min-width: 110px;
    padding: 0.85rem 1rem;
}

.control-btn:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

.start-btn,
.save-btn {
    background: var(--success);
}

.pause-btn {
    background: var(--accent);
}

.reset-btn,
.clear-btn {
    background: var(--danger);
}

#notesTextarea {
    background: var(--light);
    border: 2px solid var(--border);
    border-radius: 8px;
    color: var(--dark);
    font: inherit;
    min-height: 210px;
    padding: 1rem;
    resize: vertical;
}

.success-msg {
    align-items: center;
    background: rgba(16, 185, 129, 0.12);
    border-radius: 8px;
    color: var(--success);
    display: none;
    font-weight: 700;
    gap: 0.5rem;
    padding: 0.7rem;
}

.success-msg.open {
    display: flex;
}

.calculator-grid {
    display: grid;
    gap: 0.7rem;
    grid-template-columns: repeat(4, 1fr);
}

.calc-display {
    align-items: center;
    background: #0f172a;
    border-radius: 8px;
    color: white;
    display: flex;
    font-family: "Courier New", monospace;
    font-size: 2rem;
    font-weight: 800;
    grid-column: 1 / -1;
    justify-content: flex-end;
    min-height: 68px;
    overflow: hidden;
    padding: 1rem;
}

.calc-btn {
    border: 0;
    border-radius: 8px;
    cursor: pointer;
    font: inherit;
    font-size: 1.25rem;
    font-weight: 800;
    min-height: 55px;
}

.calc-number {
    background: var(--light);
    color: var(--dark);
}

.calc-operator {
    background: var(--primary);
    color: white;
}

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

.calc-equals {
    background: var(--success);
    color: white;
    grid-column: span 2;
}

.todo-input-group {
    display: flex;
    gap: 0.5rem;
}

#todoInput {
    background: var(--light);
    border: 2px solid var(--border);
    border-radius: 8px;
    color: var(--dark);
    flex: 1;
    font: inherit;
    padding: 0.85rem;
}

.todo-list-container {
    max-height: 260px;
    overflow-y: auto;
}

.todo-item {
    align-items: center;
    background: var(--light);
    border-radius: 8px;
    display: flex;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    padding: 0.75rem;
}

.todo-item.completed span {
    color: var(--gray);
    text-decoration: line-through;
}

.todo-delete-btn {
    background: var(--danger);
    border: 0;
    border-radius: 6px;
    color: white;
    cursor: pointer;
    margin-left: auto;
    padding: 0.35rem 0.5rem;
}

/* v23: Nothing-inspired tools hub */
.toolbox-dock {
    gap: 0.55rem;
}

.dock-center,
.dock-tool {
    border: 1px solid rgba(16, 16, 16, 0.12);
    box-shadow: 0 12px 32px rgba(15, 23, 42, 0.16);
    transition: transform 0.22s ease, opacity 0.22s ease, background 0.22s ease, color 0.22s ease;
}

.dock-center {
    background: #101010;
    color: white;
    height: 58px;
    width: 58px;
}

.dock-tool {
    background: rgba(255, 255, 255, 0.94);
    background-image: radial-gradient(rgba(0, 0, 0, 0.18) 1px, transparent 1px);
    background-size: 8px 8px;
    color: #101010;
    height: 42px;
    transform: translateY(12px) scale(0.82);
    width: 42px;
}

.dock-center:hover,
.dock-tool:hover {
    background: #101010;
    color: white;
    transform: translateY(-4px) scale(1.06);
}

.tool-modal-content {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(247, 248, 251, 0.98)),
        radial-gradient(rgba(0, 0, 0, 0.14) 1px, transparent 1px);
    background-size: auto, 14px 14px;
    border: 1px solid rgba(16, 16, 16, 0.12);
    box-shadow: 0 28px 80px rgba(15, 23, 42, 0.28);
}

.modal-icon {
    background: #101010;
    border-radius: 8px;
    color: white;
    font-size: 1.35rem;
    height: 48px;
    line-height: 48px;
    margin: 0 auto 0.75rem;
    width: 48px;
}

.pomodoro-content,
.converter-content,
.formula-content,
.cgpa-content,
.attendance-tool {
    display: grid;
    gap: 1rem;
}

.pomodoro-mode {
    color: #5f6673;
    font-size: 0.78rem;
    font-weight: 800;
    text-align: center;
    text-transform: uppercase;
}

.pomodoro-display,
.converter-result,
.attendance-result {
    align-items: center;
    background: #101010;
    border-radius: 8px;
    color: white;
    display: flex;
    font-family: "Courier New", monospace;
    font-size: clamp(2rem, 8vw, 3rem);
    font-weight: 800;
    justify-content: center;
    min-height: 104px;
    padding: 1rem;
    text-align: center;
}

.converter-result {
    font-size: clamp(1.2rem, 5vw, 1.75rem);
    min-height: 76px;
}

.attendance-result {
    align-items: start;
    display: grid;
    gap: 0.35rem;
    min-height: 92px;
}

.attendance-result strong {
    font-size: clamp(2rem, 8vw, 3rem);
    line-height: 1;
}

.attendance-result span {
    font-family: Inter, Arial, sans-serif;
    font-size: 0.92rem;
    font-weight: 800;
}

.attendance-result.danger {
    background: #d71920;
}

.pomodoro-settings,
.converter-grid {
    display: grid;
    gap: 0.75rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.converter-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.attendance-tool {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.attendance-tool .attendance-result {
    grid-column: 1 / -1;
}

.pomodoro-settings label,
.attendance-tool label,
.converter-content label,
.formula-content label {
    color: #5f6673;
    display: grid;
    font-size: 0.78rem;
    font-weight: 800;
    gap: 0.35rem;
    text-transform: uppercase;
}

.pomodoro-settings input,
.attendance-tool input,
.converter-content input,
.converter-content select,
.formula-content select,
.cgpa-row input {
    background: white;
    border: 1px solid rgba(16, 16, 16, 0.12);
    border-radius: 8px;
    color: #101010;
    font: inherit;
    min-height: 42px;
    padding: 0.65rem 0.75rem;
}

.formula-list {
    display: grid;
    gap: 0.65rem;
}

.formula-item {
    background: white;
    border: 1px solid rgba(16, 16, 16, 0.1);
    border-radius: 8px;
    display: grid;
    gap: 0.35rem;
    padding: 0.8rem;
}

.formula-item code {
    background: #101010;
    border-radius: 6px;
    color: white;
    display: block;
    overflow-x: auto;
    padding: 0.55rem;
}

.cgpa-row {
    display: grid;
    gap: 0.5rem;
    grid-template-columns: minmax(0, 1.4fr) 0.7fr 0.7fr auto;
    margin-bottom: 0.55rem;
}

.cgpa-row button {
    background: #101010;
    border: 0;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    min-height: 42px;
    width: 42px;
}

@media (max-width: 560px) {
    .toolbox-dock {
        bottom: 1rem;
        right: 1rem;
    }

    .converter-grid,
    .pomodoro-settings,
    .attendance-tool,
    .cgpa-row {
        grid-template-columns: 1fr;
    }

    .cgpa-row button {
        width: 100%;
    }
}

.toolbox-dock[hidden] {
    display: none !important;
}

.toolbox-dock.paid-locked .dock-center {
    background: #101010;
    color: #fff;
}

.toolbox-dock.paid-locked .dock-center::after {
    align-items: center;
    background: #d71920;
    border: 2px solid #fff;
    border-radius: 999px;
    color: #fff;
    content: "PAY";
    display: flex;
    font-size: 0.52rem;
    font-weight: 900;
    height: 20px;
    justify-content: center;
    position: absolute;
    right: -2px;
    top: -2px;
    width: 26px;
}

.toolhub-pay-card {
    max-width: 520px;
}

.toolhub-payment-box {
    display: grid;
    gap: 1rem;
}

.toolhub-price {
    background: #101010;
    border-radius: 8px;
    color: #fff;
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: 0;
    padding: 0.9rem;
    text-align: center;
}

body.dark-mode .toolhub-price,
[data-theme-mode="dark"] .toolhub-price {
    background: #fff;
    color: #101010;
}

.toolhub-order-summary {
    background: #fff;
    border: 1px solid rgba(16, 16, 16, 0.12);
    border-radius: 8px;
    display: grid;
    gap: 0.55rem;
    grid-template-columns: 1fr auto;
    padding: 0.85rem;
}

.toolhub-order-summary > div:first-child {
    display: grid;
    gap: 0.15rem;
}

.toolhub-order-summary > div:first-child strong {
    color: #101010;
    font-size: 1.55rem;
}

.toolhub-order-summary span,
.toolhub-order-meta strong {
    font-size: 0.76rem;
}

.toolhub-order-summary b {
    align-self: start;
    background: #e7f7ed;
    border-radius: 999px;
    color: #166534;
    font-size: 0.7rem;
    padding: 0.35rem 0.55rem;
}

.toolhub-order-meta {
    border-top: 1px solid rgba(16, 16, 16, 0.1);
    display: flex;
    grid-column: 1 / -1;
    justify-content: space-between;
    padding-top: 0.45rem;
}

.toolhub-method-grid {
    display: grid;
    gap: 0.5rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.toolhub-method {
    align-items: center;
    background: #fff;
    border: 1px solid rgba(16, 16, 16, 0.14);
    border-radius: 8px;
    color: #101010;
    display: flex;
    gap: 0.55rem;
    min-height: 54px;
    padding: 0.6rem;
    text-align: left;
}

.toolhub-method.active {
    border-color: #d71920;
    box-shadow: inset 3px 0 #d71920;
}

.toolhub-method span,
.toolhub-method strong,
.toolhub-method small {
    display: block;
}

.toolhub-method small {
    color: #5f6673;
    font-size: 0.68rem;
    margin-top: 0.1rem;
}

.toolhub-method-panel {
    display: none;
    gap: 0.5rem;
}

.toolhub-method-panel.active {
    display: grid;
}

.toolhub-method-panel input,
.toolhub-method-panel select {
    background: #fff;
    border: 1px solid rgba(16, 16, 16, 0.14);
    border-radius: 8px;
    color: #101010;
    font: inherit;
    min-height: 44px;
    padding: 0.65rem;
    width: 100%;
}

.toolhub-upi-verify,
.toolhub-split-inputs {
    display: grid;
    gap: 0.5rem;
    grid-template-columns: 1fr auto;
}

.toolhub-upi-verify button {
    background: #101010;
    border: 0;
    border-radius: 8px;
    color: #fff;
    font-weight: 800;
    padding: 0.65rem 0.8rem;
}

.toolhub-split-inputs {
    grid-template-columns: 1fr 1fr;
}

.toolhub-method-status {
    color: #5f6673;
    font-size: 0.76rem;
    font-weight: 700;
    min-height: 1rem;
}

.toolhub-method-status.success {
    color: #166534;
}
.toolhub-pay-now {
    align-items: center;
    background: #101010;
    color: #fff;
    display: flex;
    justify-content: center;
    min-height: 46px;
    text-decoration: none;
    width: 100%;
}

.toolhub-gateway-pay {
    background: #d71920;
    color: #fff;
    min-height: 48px;
    width: 100%;
}

.toolhub-method-panel p {
    background: rgba(16, 16, 16, 0.04);
    border: 1px solid rgba(16, 16, 16, 0.1);
    border-radius: 8px;
    color: #5f6673;
    font-size: 0.8rem;
    margin: 0;
    padding: 0.7rem;
}

.toolhub-pay-now:hover,
.toolhub-pay-now:focus-visible {
    background: #d71920;
    color: #fff;
}

.toolhub-pay-now.disabled {
    cursor: not-allowed;
    opacity: 0.55;
    pointer-events: auto;
}

.toolhub-upi-apps {
    display: grid;
    gap: 0.5rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

#toolHubPayNowBtn[hidden],
#toolHubUpiApps[hidden] {
    display: none !important;
}

.toolhub-upi-app {
    align-items: center;
    background: #fff;
    border: 1px solid rgba(16, 16, 16, 0.14);
    border-radius: 8px;
    color: #101010;
    display: flex;
    flex-direction: column;
    font-size: 0.75rem;
    font-weight: 900;
    gap: 0.35rem;
    justify-content: center;
    min-height: 58px;
    padding: 0.5rem;
    text-align: center;
    text-decoration: none;
}

.toolhub-upi-app i {
    font-size: 1.2rem;
}

.toolhub-upi-app:hover,
.toolhub-upi-app:focus-visible {
    background: #d71920;
    border-color: #d71920;
    color: #fff;
}

.toolhub-upi-app.disabled {
    cursor: not-allowed;
    opacity: 0.5;
    pointer-events: auto;
}

body.dark-mode .toolhub-upi-app,
[data-theme-mode="dark"] .toolhub-upi-app {
    background: #101010;
    border-color: rgba(255,255,255,0.18);
    color: #fff;
}

body.dark-mode .toolhub-order-summary,
body.dark-mode .toolhub-method,
body.dark-mode .toolhub-method-panel input,
body.dark-mode .toolhub-method-panel select,
[data-theme-mode="dark"] .toolhub-order-summary,
[data-theme-mode="dark"] .toolhub-method,
[data-theme-mode="dark"] .toolhub-method-panel input,
[data-theme-mode="dark"] .toolhub-method-panel select {
    background: #101010;
    border-color: rgba(255,255,255,0.18);
    color: #fff;
}

body.dark-mode .toolhub-order-summary > div:first-child strong,
[data-theme-mode="dark"] .toolhub-order-summary > div:first-child strong {
    color: #fff;
}

/* v31: Tool Hub theme fixes for EngiLearn light/dark mode */
.tool-modal-content,
.toolhub-pay-card {
    background: var(--white) !important;
    border: 1px solid var(--border) !important;
    color: var(--dark) !important;
}

.toolhub-payment-box,
.toolhub-method-panel {
    color: var(--dark) !important;
}

.toolhub-order-summary,
.toolhub-method,
.toolhub-method-panel input,
.toolhub-method-panel select,
.toolhub-method-panel p,
.toolhub-upi-app {
    background: var(--white) !important;
    border-color: var(--border) !important;
    color: var(--dark) !important;
}

.toolhub-order-summary > div:first-child strong,
.toolhub-method strong,
.toolhub-method span {
    color: var(--dark) !important;
}

.toolhub-method small,
.toolhub-method-status,
.toolhub-method-panel p,
.toolhub-order-summary span,
.toolhub-order-meta strong {
    color: var(--gray) !important;
}

.toolhub-order-meta {
    border-top-color: var(--border) !important;
}

.toolhub-price,
.toolhub-pay-now,
.toolhub-upi-verify button {
    background: #101010 !important;
    color: #fff !important;
}

.toolhub-gateway-pay {
    background: #d71920 !important;
    color: #fff !important;
}

.toolhub-method.active {
    background: color-mix(in srgb, var(--white) 88%, #d71920 12%) !important;
    border-color: #d71920 !important;
    box-shadow: inset 3px 0 #d71920 !important;
}

.toolhub-method-status.success {
    color: var(--success) !important;
}

body[data-theme="dark"] .tool-modal-content,
body[data-theme="dark"] .toolhub-pay-card {
    background: #101010 !important;
    border-color: rgba(255, 255, 255, 0.16) !important;
    color: #f8fafc !important;
}

body[data-theme="dark"] .toolhub-payment-box,
body[data-theme="dark"] .toolhub-method-panel,
body[data-theme="dark"] .toolhub-order-summary,
body[data-theme="dark"] .toolhub-method,
body[data-theme="dark"] .toolhub-method-panel input,
body[data-theme="dark"] .toolhub-method-panel select,
body[data-theme="dark"] .toolhub-method-panel p,
body[data-theme="dark"] .toolhub-upi-app {
    background: #171717 !important;
    border-color: rgba(255, 255, 255, 0.16) !important;
    color: #f8fafc !important;
}

body[data-theme="dark"] .toolhub-order-summary > div:first-child strong,
body[data-theme="dark"] .toolhub-method strong,
body[data-theme="dark"] .toolhub-method span {
    color: #f8fafc !important;
}

body[data-theme="dark"] .toolhub-method small,
body[data-theme="dark"] .toolhub-method-status,
body[data-theme="dark"] .toolhub-method-panel p,
body[data-theme="dark"] .toolhub-order-summary span,
body[data-theme="dark"] .toolhub-order-meta strong {
    color: #cbd5e1 !important;
}

body[data-theme="dark"] .toolhub-order-meta {
    border-top-color: rgba(255, 255, 255, 0.14) !important;
}

body[data-theme="dark"] .toolhub-price,
body[data-theme="dark"] .toolhub-pay-now,
body[data-theme="dark"] .toolhub-upi-verify button {
    background: #fff !important;
    color: #101010 !important;
}

body[data-theme="dark"] .toolhub-method.active {
    background: rgba(215, 25, 32, 0.16) !important;
    border-color: #d71920 !important;
    box-shadow: inset 3px 0 #d71920 !important;
}

body[data-theme="dark"] .toolhub-method-status.success {
    color: #86efac !important;
}

body[data-theme="dark"] .tool-close {
    color: #e2e8f0 !important;
}

body[data-ui-theme="nothing-os"] .tool-modal-content,
body[data-ui-theme="nothing-os"] .toolhub-pay-card {
    border-radius: 8px !important;
}

@media (max-width: 560px) {
    .toolbox-dock {
        bottom: 1rem !important;
        right: max(0.85rem, env(safe-area-inset-right)) !important;
    }

    .toolbox-dock.paid-locked .dock-center::after {
        border-width: 2px;
        font-size: 0.46rem;
        height: 18px;
        right: 2px;
        top: 2px;
        width: 24px;
    }

    .toolhub-pay-card {
        margin: 0.5rem auto;
        max-height: calc(100dvh - 1rem);
        padding: 0.85rem;
        width: calc(100% - 1rem);
    }

    .toolhub-pay-card .modal-header {
        margin-bottom: 0.65rem;
    }

    .toolhub-payment-box {
        gap: 0.6rem;
    }

    .toolhub-price {
        font-size: 1.25rem;
        padding: 0.55rem;
    }

    .toolhub-pay-now {
        min-height: 46px;
        width: 100%;
    }
}