:root {
    --color-primary: hsl(360, 50%, 90%);
    --color-card: hsl(360, 50%, 95%);
    --color-secondary: hsl(360, 50%, 10%);
    --color-tertiary: hsl(360, 50%, 90%);
    --color-accent: hsl(300, 80%, 20%);

    /* Shadows */
    --shadow-s: 0 1px 2px rgba(0, 0, 0, 0.1);
    --shadow-m: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-l: 0 10px 15px rgba(0, 0, 0, 0.1);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.625rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 10px;
    --radius-lg: 12px;
    --radius-xl: 24px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

.dark {
    --color-primary: hsl(360, 50%, 10%);
    --color-secondary: hsl(360, 50%, 90%);
    --color-tertiary: hsl(60, 80%, 80%);
    --color-accent: hsl(300, 80%, 80%);
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--color-primary);
    color: var(--color-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    margin: 0 auto;
    width: 80%;
    min-height: 100vh;
    padding: var(--spacing-md);
}

h1 {
    font-size: 32px;
    margin: var(--spacing-lg) 0;
    font-weight: 1000;
}

h3 {
    margin: var(--spacing-md) 0 var(--spacing-sm);
}

h5 {
    font-weight: normal;
    margin: var(--spacing-xs) 0;
}

/* Main Card */
.main-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: var(--color-card);
    max-width: 6in;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-m);
    padding: var(--spacing-md);
    width: 100%;
}

/* Input Styles */
input[type="number"] {
    border: 0;
    background-color: var(--color-primary);
    border-radius: var(--radius-md);
    padding: 16px;
    font-size: 16px;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-s);
}

input[type="number"]:hover {
    box-shadow: var(--shadow-m);
}

input[type="number"]:focus {
    outline: none;
    background-color: var(--color-tertiary);
    border: 3px solid var(--color-secondary);
}

/* Target Time Input Section */
#goal_input {
    display: flex;
    gap: 20px;
    margin-bottom: var(--spacing-md);
}

.target-time-input {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.target-time-input input {
    width: 100px;
}

.target-time-input label {
    margin-top: var(--spacing-sm);
    font-weight: normal;
    color: var(--color-secondary);
}

/* Icon Headings */
#target-time-heading i,
#distance-heading i {
    margin-right: var(--spacing-xs);
    color: var(--color-accent);
    font-size: 1.2em;
    vertical-align: bottom;
}

/* Event Buttons */
.event-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    justify-content: center;
    width: 100%;
    margin-bottom: var(--spacing-md);
}

.event-buttons input[type="radio"] {
    display: none;
}

.event-buttons label {
    padding: 14px 8px;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    background-color: var(--color-primary);
    color: var(--color-secondary);
    transition: all var(--transition-fast);
    text-align: center;
    font-size: 14px;
    box-shadow: var(--shadow-s);
}

.event-buttons label:hover {
    background-color: var(--color-accent);
    color: var(--color-primary);
}

.event-buttons label:has(input:checked) {
    background-color: var(--color-accent);
    color: var(--color-primary);
}

.event-buttons label:has(input:checked):hover {
    box-shadow: var(--shadow-m);
}

/* Custom Distance */
#custom-distance-div {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
 
}

#custom-distance {
    width: 100%;
    max-width: 300px;
}

/* Settings Section */
.settings {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    margin-top: var(--spacing-md);
}

.settings p {
    color: var(--color-secondary);
    font-size: 13px;
    margin-bottom: var(--spacing-sm);
}

.settings>div {
    display: flex;
    gap: var(--spacing-sm);
    width: 100%;
}

.settings label {
    flex: 1;
    background-color: var(--color-primary);
    padding: 12px;
    border-radius: var(--radius-lg);
    cursor: pointer;
    text-align: center;
    transition: all var(--transition-fast);
    color: var(--color-secondary);
    font-size: 14px;
    box-shadow: var(--shadow-s);
}

.settings label:hover {
    background-color: var(--color-accent);
    color: var(--color-primary)
}

.settings input[type="radio"] {
    display: none;
}

.settings label:has(input:checked) {
    background-color: var(--color-accent);
    color: var(--color-primary);
}

/* Custom Track Length Input */
#custom-track-div {
    display: flex;
    justify-content: center;
    
    width: 100%;
    margin-top: var(--spacing-md);
}

#custom-track-input {
    width: 100%;
    max-width: 200px;
    background-color: var(--color-primary);
    border: 0;
    border-radius: var(--radius-md);
    padding: 12px;
    font-size: 14px;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-s);
    color: var(--color-secondary);
    margin: 10px;
}

#custom-track-input:hover {
    box-shadow: var(--shadow-m);
}

#custom-track-input:focus {
    outline: none;
    background-color: var(--color-tertiary);
    border: 3px solid var(--color-secondary);
}

/* Results Table */
#result {
    margin-top: var(--spacing-lg);
    border-collapse: collapse;
    width: 100%;
    max-width: 6in;
    background-color: var(--color-secondary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-m);
    font-size: 15px;
    
}

#result thead {
    background-color: var(--color-accent);
    color: var(--color-primary);
}

#result th {
    padding: 12px 14px;
    text-align: left;
    font-weight: 600;
    letter-spacing: 0.03em;
}

#result tbody tr {
    border-bottom: 1px solid var(--color-tertiary);
    background-color: var(--color-card);
    transition: background-color var(--transition-fast);
    font-family: monospace;
}

#result tbody tr:last-child {
    border-bottom: none;
}

#result tbody tr:hover {
    background-color: var(--color-primary);
}

#result td {
    padding: 12px 14px;
}

#result td:nth-child(1),
#result td:nth-child(2) {
    font-weight: 600;
}

#result td:nth-child(4) {
    font-family: monospace;
    font-weight: 600;
}

#scroll-to-see {
    margin-top: 10px;
    opacity: 0;
    color: rgba(0, 0, 0, 0.5)
}




/* Responsive Design */
@media (max-width: 700px) {
    body {
        width: 100%;
        padding: 0;
        background-color: var(--color-card);
    }
    

    .main-card {
        border-radius: 0;
        /* min-height: 100vh; */
        padding: 20px;
        opacity: 1;
        background-color: #ffffff00;
    }

    .event-buttons {
        grid-template-columns: repeat(2, 1fr);
    }

    h1 {
        font-size: 28px;
        margin: var(--spacing-xs);
    }

    #goal_input {
        gap: 10px;
    }


    #scroll-to-see {
        opacity: 1;
    }
}


footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 16px 20px;
    color: rgba(0, 0, 0, 0.5);
    background: var(--color-primary);
    text-align: center;
    font-size: 13px;
    border-top: 1px solid var(--color-tertiary);
    z-index: 10;
}

footer a {
    color: var(--color-secondary);
    background: none;
    padding: 0;
    border-radius: 0;
    text-decoration: underline;
}

footer a:hover {
    color: var(--color-accent);
}


body {
    padding-bottom: 100px;
}

@media (max-width: 700px) {
    footer {
        padding: 12px 16px;
        font-size: 11px;
    }
    
    body {
        padding-bottom: 80px;
    }
}