/* =========================================================
   Theme Variables
   ========================================================= */

:root {
    /* Light theme defaults */
    --colour-bg-page:        #ffffff;
    --colour-bg-panel:       #f9f9f9;
    --colour-bg-tab-content: #ffffff;
    --colour-border:         #e0e0e0;
    --colour-border-wrap:    #e2e8f0;
    --colour-border-cell:    #000000;
    --colour-accent:         firebrick;
    --colour-tab-active:     #00bcd4;
    --colour-text-primary:   #1a1a1a;
    --colour-text-muted:     #808080;
    --gap:                   0.5rem;
}

/* Automatic dark mode — follows the OS setting unless overridden by data-theme */
@media (prefers-color-scheme: dark) {
    :root {
        --colour-bg-page:        #1a1a1a;
        --colour-bg-panel:       #2a2a2a;
        --colour-bg-tab-content: #2a2a2a;
        --colour-border:         #444444;
        --colour-border-wrap:    #555555;
        --colour-border-cell:    #888888;
        --colour-accent:         #e57373;
        --colour-tab-active:     #4dd0e1;
        --colour-text-primary:   #e8e8e8;
        --colour-text-muted:     #aaaaaa;
    }
}

/* Manual dark override — applied when the toggle button sets data-theme="dark" */
[data-theme="dark"] {
    --colour-bg-page:        #1a1a1a;
    --colour-bg-panel:       #2a2a2a;
    --colour-bg-tab-content: #2a2a2a;
    --colour-border:         #444444;
    --colour-border-wrap:    #555555;
    --colour-border-cell:    #888888;
    --colour-accent:         #e57373;
    --colour-tab-active:     #4dd0e1;
    --colour-text-primary:   #e8e8e8;
    --colour-text-muted:     #aaaaaa;
}

/* Manual light override — allows forcing light mode even on a dark-preference OS */
[data-theme="light"] {
    --colour-bg-page:        #ffffff;
    --colour-bg-panel:       #f9f9f9;
    --colour-bg-tab-content: #ffffff;
    --colour-border:         #e0e0e0;
    --colour-border-wrap:    #e2e8f0;
    --colour-border-cell:    #000000;
    --colour-accent:         firebrick;
    --colour-tab-active:     #00bcd4;
    --colour-text-primary:   #1a1a1a;
    --colour-text-muted:     #808080;
}


/* =========================================================
   Reset & Base
   ========================================================= */

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
}

body {
    font-family: system-ui;
    margin-inline: auto;
    background-color: var(--colour-bg-page);
    color: var(--colour-text-primary);
}

img {
    max-width: 100%;
    display: block;
}

/* Inputs inherit the panel background and themed border so they look at home in dark mode */
input {
    background-color: var(--colour-bg-panel);
    color: var(--colour-text-primary);
    border: 1px solid var(--colour-border);
    border-radius: 3px;
}

h1, h3 {
    margin: 1rem 0;
}


/* =========================================================
   Header & Theme Toggle
   ========================================================= */

header {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    padding: 0.5rem 1rem;
    border-bottom: 1px solid var(--colour-border);
    background-color: var(--colour-bg-panel);
}

#theme-toggle {
    position: absolute;
    right: 1rem;
    padding: 0.35rem 0.75rem;
    font-size: 0.85rem;
    border: 1px solid var(--colour-border);
    background-color: var(--colour-bg-page);
    color: var(--colour-text-primary);
    cursor: pointer;
    border-radius: 4px;
    transition: background-color 0.2s;
}

#theme-toggle:hover {
    background-color: var(--colour-border);
}


/* =========================================================
   Main Borehole Entry Grid
   ========================================================= */

.grid-wrap {
    width: 100%;
    border: 1px dashed var(--colour-border-wrap);
    padding: 8px;
    box-sizing: border-box;
    background: var(--colour-bg-page);
    overflow-x: auto;
}

/* Column count is set dynamically by populateGrids() to match numBoreholes.
   The repeat(8, 1fr) here is a static fallback if JS hasn't run yet. */
.main-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: var(--gap);
    margin-top: 1rem;
    width: 100%;
    max-width: 100%;
}

/* entry-wrapper uses flexbox so the controls row sits naturally below the form panels */
.entry-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.borehole-properties,
.borehole {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    border-radius: 6px;
    padding: 1rem;
    border: 1px solid var(--colour-border);
    background-color: var(--colour-bg-panel);
    gap: 0.5rem;
    box-sizing: border-box;
    width: 100%;
    min-width: 15rem;
    max-width: 20rem;
}

.borehole p {
    font-weight: bold;
    text-align: center;
    color: var(--colour-text-primary);
}

.borehole-properties input,
.borehole input {
    width: 100%;
    min-width: 0;
    padding: 0.25rem;
}


/* =========================================================
   Per-Borehole Structural Controls (+ Left / + Right / Delete)
   ========================================================= */

.bh-controls {
    display: flex;
    gap: 0.25rem;
    padding: 0.25rem;
    justify-content: left;
    min-width: 15rem;
    max-width: 20rem;
}

.bh-ctrl-btn {
    flex: 1;
    padding: 0.25rem 0.4rem;
    font-size: 0.75rem;
    border: 1px solid var(--colour-border);
    background-color: var(--colour-bg-panel);
    color: var(--colour-text-primary);
    cursor: pointer;
    border-radius: 3px;
    transition: background-color 0.2s;
}

.bh-ctrl-btn:hover:not(:disabled) {
    background-color: var(--colour-border);
}

.bh-ctrl-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.bh-delete-btn {
    border-color: var(--colour-accent);
    color: var(--colour-accent);
}

.bh-delete-btn:hover:not(:disabled) {
    background-color: var(--colour-accent);
    color: var(--colour-bg-page);
}


/* =========================================================
   Tab Data Sheet
   ========================================================= */

.tab-header {
    display: flex;
    cursor: pointer;
    border-bottom: 2px solid var(--colour-accent);
}

.tablinks {
    overflow: hidden;
    border: 1px solid var(--colour-border);
    background-color: var(--colour-bg-panel);
    color: var(--colour-text-primary);
    transition: background-color 0.3s;
}

.tablinks.active {
    background-color: var(--colour-tab-active);
    color: var(--colour-bg-page);
}

.tabcontent {
    display: none;
    grid-template-columns: repeat(14, minmax(4rem, auto));
    grid-gap: 7px;
    padding: 1rem;
    border: 1px solid var(--colour-border);
    background-color: var(--colour-bg-tab-content);
    box-sizing: border-box;
    text-align: center;
}

.tabcontent.active {
    display: grid;
}

.cell-title {
    border: 1px solid var(--colour-border-cell);
    color: var(--colour-text-primary);
}

.tabcontent input {
    width: 100%;
    min-width: 0;
    box-sizing: border-box;
}


/* =========================================================
   Plot Area
   ========================================================= */

.plotgrid {
    display: grid;
    grid-template-columns: 1fr auto;
}

/* plot-box uses normal document flow as a grid child; no absolute positioning needed */
.plot-box {
    width: 100%;
    min-width: 0;
}

.button-pair {
    display: grid;
    grid-template-columns: 150px 100px;
    box-sizing: border-box;
    width: 100%;
}

.plotbuttongrid {
    display: grid;
    box-sizing: border-box;
    grid-template-rows: minmax(auto, 1fr);
    height: 100%;
    padding: 0 8px;
    justify-self: end;
}

/* Plot tabs don't use the 14-column data sheet layout */
#bh-plot-tab.active,
#gd-plot-tab.active {
    display: block;
}

#chart-container {
    width: 100%;
    padding: 0 8px;
}

#soil-chart {
    display: block;
    width: 100%;
}


/* =========================================================
   Action Buttons
   ========================================================= */

.button-container {
    margin-top: 10px;
    text-align: center;
}

.button-container button {
    width: 200px;
    padding: 10px;
    margin: 5px;
    border: 1px solid var(--colour-border);
    background-color: var(--colour-bg-panel);
    color: var(--colour-text-primary);
    cursor: pointer;
    border-radius: 4px;
    transition: background-color 0.2s;
}

.button-container button:hover {
    background-color: var(--colour-border);
}


/* =========================================================
   Results Section
   ========================================================= */

/*#results {*/
/*    margin: 1rem 0;*/
/*}*/


/* =========================================================
   Responsive Breakpoints
   ========================================================= */

@media screen and (max-width: 1200px) {
    .main-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media screen and (max-width: 768px) {
    .main-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}