.tools-page {
width: 100%;
max-width: 1000px;
margin: 0 auto;
animation: pageEnter 500ms ease both;
}

.tools-header {
display: flex;
align-items: center;
gap: 18px;
margin-bottom: 24px;
}

.tools-header .logo {
color: var(--blue);
font-size: 24px;
font-weight: 700;
letter-spacing: -0.6px;
text-decoration: none;
}

.tools-header > div {
padding-left: 18px;
border-left: 1px solid var(--border);
}

.tools-header h1 {
font-size: 20px;
font-weight: 600;
line-height: 1.2;
}

.tools-header p {
margin-top: 4px;
color: var(--text-secondary);
font-size: 13px;
}

.tools-layout {
display: grid;
grid-template-columns: 240px minmax(0, 1fr);
gap: 14px;
align-items: start;
}

.tool-list {
min-width: 0;
max-height: 650px;
overflow-y: auto;
padding: 8px;
background: var(--surface);
border: 1px solid var(--border);
border-radius: var(--radius);
box-shadow: var(--shadow);
scrollbar-width: thin;
}

.tool-category {
padding: 8px 0 12px;
}

.tool-category + .tool-category {
margin-top: 8px;
padding-top: 16px;
border-top: 1px solid var(--border);
}

.tool-category h2 {
margin: 0 8px 7px;
color: var(--text-secondary);
font-size: 12px;
font-weight: 600;
letter-spacing: 0.2px;
}

.tool-option {
width: 100%;
min-height: 40px;
display: flex;
align-items: center;
padding: 0 10px;
border: 0;
border-radius: 7px;
background: transparent;
color: var(--text-secondary);
font-family: inherit;
font-size: 13px;
font-weight: 500;
text-align: left;
cursor: pointer;
transition:
background-color var(--transition),
color var(--transition);
}

.tool-option:hover {
background: var(--surface-hover);
color: var(--text);
}

.tool-option.active {
background: var(--blue-soft);
color: var(--blue);
}

.tool-workspace {
min-width: 0;
padding: 24px;
background: var(--surface);
border: 1px solid var(--border);
border-radius: var(--radius);
box-shadow: var(--shadow);
}

.tool-title {
margin-bottom: 24px;
}

.tool-title h2 {
font-size: 18px;
font-weight: 600;
}

.tool-title p {
margin-top: 5px;
color: var(--text-secondary);
font-size: 13px;
}

.tool-inputs {
display: grid;
gap: 14px;
}

.input-group {
display: flex;
flex-direction: column;
gap: 7px;
}

.input-group label {
color: var(--text-secondary);
font-size: 12px;
font-weight: 500;
}

.tool-input {
width: 100%;
height: 44px;
padding: 0 12px;
border: 1px solid var(--border);
border-radius: 8px;
background: var(--background);
color: var(--text);
font-family: inherit;
font-size: 15px;
outline: none;
transition: border-color var(--transition);
}

.tool-input:focus {
border-color: var(--blue);
}

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

.fraction-inputs {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 10px;
}

.fraction-inputs .input-group {
min-width: 0;
}

.calculate-button {
width: 100%;
height: 44px;
margin-top: 22px;
border: 1px solid var(--blue);
border-radius: 8px;
background: var(--blue);
color: white;
font-family: inherit;
font-size: 13px;
font-weight: 600;
cursor: pointer;
transition:
background-color var(--transition),
border-color var(--transition);
}

.calculate-button:hover {
background: var(--blue-hover);
border-color: var(--blue-hover);
}

.tool-result {
margin-top: 16px;
padding: 16px;
border: 1px solid var(--border);
border-radius: 8px;
background: var(--background);
}

.result-label {
display: block;
margin-bottom: 8px;
color: var(--text-muted);
font-size: 11px;
font-weight: 600;
text-transform: uppercase;
letter-spacing: 0.5px;
}

#toolResult {
color: var(--text);
font-size: 20px;
font-weight: 500;
overflow-wrap: anywhere;
}

.tool-error {
color: #ef4444;
}

.angle-mode {
display: flex;
align-items: center;
justify-content: space-between;
gap: 12px;
margin-bottom: 18px;
padding: 10px 12px;
border: 1px solid var(--border);
border-radius: 8px;
background: var(--background);
}

.angle-mode-label {
color: var(--text-secondary);
font-size: 12px;
font-weight: 500;
}

.angle-mode-options {
display: flex;
gap: 4px;
padding: 3px;
border: 1px solid var(--border);
border-radius: 7px;
background: var(--surface);
}

.angle-mode-button {
min-width: 54px;
height: 30px;
padding: 0 10px;
border: 0;
border-radius: 5px;
background: transparent;
color: var(--text-secondary);
font-family: inherit;
font-size: 11px;
font-weight: 600;
cursor: pointer;
transition:
background-color var(--transition),
color var(--transition);
}

.angle-mode-button:hover {
background: var(--surface-hover);
color: var(--text);
}

.angle-mode-button.active {
background: var(--blue-soft);
color: var(--blue);
}

@media (max-width: 720px) {
.tools-layout {
grid-template-columns: 1fr;
}

.tool-list {
    max-height: 260px;
}

}

@media (max-width: 520px) {
body {
padding: 24px 12px;
}

.tools-header {
    gap: 12px;
}

.tools-header .logo {
    font-size: 21px;
}

.tools-header > div {
    padding-left: 12px;
}

.tools-header h1 {
    font-size: 18px;
}

.tool-workspace {
    padding: 18px;
}

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

.angle-mode {
    align-items: flex-start;
    flex-direction: column;
}

.angle-mode-options {
    width: 100%;
}

.angle-mode-button {
    flex: 1;
}

}