/* hackdiet — application stylesheet.
 *
 * Palette: Nord (https://www.nordtheme.com). The page picks light or dark
 * based on the saved preference (data-theme="light|dark") or, if unset,
 * prefers-color-scheme.
 */

/* The :root selectors here MUST stay scoped to the document root. We use
 * `data-theme` as a HTML attribute on individual elements (e.g. the theme
 * toggle buttons in /settings) and we don't want those elements to also
 * redefine the palette inside themselves — that's how the "Dark" button
 * ended up with invisible-light-on-light text in light mode.
 */
:root,
:root[data-theme="light"] {
    /* Polar Night */
    --nord0: #2e3440;
    --nord1: #3b4252;
    --nord2: #434c5e;
    --nord3: #4c566a;
    /* Snow Storm */
    --nord4: #d8dee9;
    --nord5: #e5e9f0;
    --nord6: #eceff4;
    /* Frost */
    --nord7: #8fbcbb;
    --nord8: #88c0d0;
    --nord9: #81a1c1;
    --nord10: #5e81ac;
    /* Aurora */
    --nord11: #bf616a;
    --nord12: #d08770;
    --nord13: #ebcb8b;
    --nord14: #a3be8c;
    --nord15: #b48ead;

    --bg:         var(--nord6);
    --bg-elev:    #ffffff;
    --bg-top:     var(--nord5);
    --fg:         var(--nord0);
    --fg-soft:    var(--nord1);
    --muted:      var(--nord3);
    --border:     var(--nord4);
    --border-soft:#e9edf2;
    --accent:     var(--nord10);
    --accent-soft:#dfe7f1;
    --accent-fg:  #ffffff;
    --link:       var(--nord10);
    --success:    #57794b;
    --danger:     #a03c46;

    --chart-diamond:         var(--nord10);
    --chart-diamond-flagged: var(--nord13);
    --chart-trend:           var(--nord11);
    --chart-plan:            var(--nord3);
    --chart-drop:            var(--nord14);
    --chart-grid:            #e3e7ee;
    --chart-axis:            var(--nord3);
    --chart-muted:           var(--nord3);
    --chart-bg:              transparent;
    --chart-weekend:         #f4f6fa;

    --radius: 8px;
    --radius-sm: 4px;
    --shadow-sm: 0 1px 2px rgba(46,52,64,0.05);
    --shadow-md: 0 4px 16px rgba(46,52,64,0.08);
    --mono: ui-monospace, SFMono-Regular, "JetBrains Mono", Consolas, monospace;
    --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

:root[data-theme="dark"] {
    --bg:         var(--nord0);
    --bg-elev:    var(--nord1);
    --bg-top:     var(--nord1);
    --fg:         var(--nord6);
    --fg-soft:    var(--nord5);
    --muted:      var(--nord4);
    --border:     var(--nord2);
    --border-soft:#363d4a;
    --accent:     var(--nord8);
    --accent-soft:#2c3a47;
    --accent-fg:  var(--nord0);
    --link:       var(--nord8);
    --success:    var(--nord14);
    --danger:     var(--nord11);

    --chart-diamond:         var(--nord8);
    --chart-diamond-flagged: var(--nord13);
    --chart-trend:           var(--nord11);
    --chart-plan:            var(--nord4);
    --chart-drop:            var(--nord14);
    --chart-grid:            #3a4150;
    --chart-axis:            var(--nord4);
    --chart-muted:           var(--nord4);
    --chart-weekend:         #333a46;

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.25);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.3);
}

/* Auto mode: honour OS preference when no explicit toggle was saved. */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]):not([data-theme="dark"]) {
        --bg:         var(--nord0);
        --bg-elev:    var(--nord1);
        --bg-top:     var(--nord1);
        --fg:         var(--nord6);
        --fg-soft:    var(--nord5);
        --muted:      var(--nord4);
        --border:     var(--nord2);
        --border-soft:#363d4a;
        --accent:     var(--nord8);
        --accent-soft:#2c3a47;
        --accent-fg:  var(--nord0);
        --link:       var(--nord8);
        --success:    var(--nord14);
        --danger:     var(--nord11);

        --chart-diamond:         var(--nord8);
        --chart-diamond-flagged: var(--nord13);
        --chart-trend:           var(--nord11);
        --chart-plan:            var(--nord4);
        --chart-drop:            var(--nord14);
        --chart-grid:            #3a4150;
        --chart-axis:            var(--nord4);
        --chart-muted:           var(--nord4);
        --chart-weekend:         #333a46;
    }
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: var(--sans);
    font-size: 15px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

h1 { font-size: 1.5rem; margin: 0 0 1rem; letter-spacing: -0.01em; }
h2 { font-size: 1.15rem; margin: 1.25rem 0 0.5rem; letter-spacing: -0.005em; }
h3 { font-size: 0.875rem; margin: 0 0 0.5rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; }

.container {
    max-width: 1020px;
    margin: 0 auto;
    padding: 1rem 1rem 3rem;
}

/* --- Top bar --- */

header.topbar {
    max-width: 1020px;
    margin: 1rem auto 0;
    background: var(--bg-elev);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 0.5rem 0.9rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
    min-height: 3rem;
    box-shadow: var(--shadow-sm);
}

header.topbar .brand {
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--fg);
    letter-spacing: -0.01em;
}

header.topbar nav {
    display: flex;
    gap: 0.25rem;
    flex: 1 1 auto;
    flex-wrap: wrap;
}

header.topbar nav a {
    color: var(--muted);
    font-weight: 500;
    padding: 0.35rem 0.7rem;
    border-radius: var(--radius-sm);
    transition: background-color 0.12s, color 0.12s;
}

header.topbar nav a:hover { background: var(--accent-soft); color: var(--fg); text-decoration: none; }
header.topbar nav a.active { background: var(--accent-soft); color: var(--fg); }

header.topbar .right {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

header.topbar .user {
    color: var(--muted);
    font-size: 0.875rem;
}

@media (max-width: 640px) {
    header.topbar {
        margin: 0.5rem auto 0;
        gap: 0.5rem;
        padding: 0.5rem 0.75rem;
        border-radius: 0;
        border-left: none;
        border-right: none;
    }
    header.topbar nav {
        order: 3;
        width: 100%;
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        /* soft fade on the right edge hints that there's more nav off-screen */
        mask-image: linear-gradient(to right, black 85%, transparent);
    }
    header.topbar nav::-webkit-scrollbar { display: none; }
    header.topbar nav a { flex: 0 0 auto; white-space: nowrap; }
    header.topbar .brand { font-size: 1rem; }
    header.topbar .right { margin-left: auto; }
}

@media (max-width: 420px) {
    header.topbar { margin: 0 auto; border-radius: 0; }
}

/* --- Cards --- */

.card {
    background: var(--bg-elev);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-sm);
}

.card.tight { padding: 0.6rem 1rem; }
.card.accent {
    border-color: var(--accent);
    background: linear-gradient(180deg, var(--accent-soft), var(--bg-elev) 60%);
}

/* --- Inline helpers --- */

.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.xsmall { font-size: 0.75rem; }
.row { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem; }
.row > .spacer { flex: 1 1 auto; }

/* --- Forms --- */

form.stacked { display: flex; flex-direction: column; gap: 0.75rem; }
.settings-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1rem; margin-bottom: 1rem; }
.settings-grid .card { margin-bottom: 0; }
form.stacked label:not(.radio-row) { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.875rem; color: var(--muted); font-weight: 500; }
form.stacked label:not(.radio-row) input, form.stacked label:not(.radio-row) select { width: 100%; }
form.stacked label:not(.radio-row) .hint { color: var(--muted); font-size: 0.75rem; font-weight: 400; }
form.stacked label.radio-row { display: flex; align-items: center; gap: 0.55rem; font-size: 0.95rem; font-weight: 500; color: var(--fg); cursor: pointer; }
form.stacked label.radio-row input { width: auto; }

/* Stacked label for standalone use (outside form.stacked) — used by the calc. */
label.stacked-field { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.875rem; color: var(--muted); font-weight: 500; }
label.stacked-field input, label.stacked-field select { width: 100%; }
label.stacked-field .hint { color: var(--muted); font-size: 0.75rem; font-weight: 400; }
label.radio-row { display: flex; align-items: center; gap: 0.55rem; font-size: 0.95rem; font-weight: 500; color: var(--fg); cursor: pointer; }
label.radio-row input { width: auto; }
form.inline { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: flex-end; }

input[type=text], input[type=password], input[type=number],
input[type=date], input[type=email], select, textarea {
    padding: 0.55rem 0.7rem;
    background: var(--bg);
    color: var(--fg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font: inherit;
    font-size: 1rem; /* 16px — prevents iOS input-focus zoom */
    min-height: 2.5rem; /* 40px — touch-friendly */
}

@media (pointer: coarse) {
    input[type=text], input[type=password], input[type=number],
    input[type=date], input[type=email], select, textarea {
        min-height: 2.75rem; /* 44px on touch devices */
    }
}

input:focus, select:focus, textarea:focus {
    outline: 2px solid var(--accent);
    outline-offset: -1px;
    border-color: var(--accent);
}

input[readonly] { background: var(--bg-top); cursor: not-allowed; }

button, .btn {
    background: var(--accent);
    color: var(--accent-fg);
    border: none;
    padding: 0.55rem 1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font: inherit;
    font-weight: 500;
    transition: filter 0.12s, background-color 0.12s, transform 0.05s;
    line-height: 1.2;
    min-height: 2.5rem; /* 40px */
}

@media (pointer: coarse) {
    button, .btn { min-height: 2.75rem; } /* 44px on touch */
}

button:hover, .btn:hover { filter: brightness(1.05); }
button:active, .btn:active { transform: translateY(1px); }
button:disabled, .btn:disabled { opacity: 0.5; cursor: not-allowed; filter: none; }

button.ghost, .btn.ghost {
    background: transparent;
    color: var(--fg);
    border: 1px solid var(--border);
}
button.ghost:hover, .btn.ghost:hover { background: var(--accent-soft); filter: none; }
.btn.ghost.active, button.ghost.active { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }

button.danger, .btn.danger { background: var(--danger); }
button.icon, .btn.icon { padding: 0.4rem 0.55rem; line-height: 1; }

/* --- Flash / alerts --- */

.flash {
    padding: 0.7rem 0.9rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    background: var(--accent-soft);
    border: 1px solid var(--border);
    font-size: 0.9rem;
}

.flash.error { background: #faddde; color: #5a1d22; border-color: #eec1c3; }
:root[data-theme="dark"] .flash.error,
:root:not([data-theme="light"]):not([data-theme="dark"]) .flash.error { background: #4b2327; color: #f5d4d6; border-color: #6e3036; }
@media (prefers-color-scheme: light) {
    :root:not([data-theme="light"]):not([data-theme="dark"]) .flash.error {
        background: #faddde; color: #5a1d22; border-color: #eec1c3;
    }
}

/* --- Tables (log grid) --- */

.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: var(--radius-sm); }

table.log {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    min-width: 560px;
}

table.log th, table.log td {
    padding: 0.45rem 0.6rem;
    border-bottom: 1px solid var(--border-soft);
    text-align: left;
    vertical-align: middle;
}

table.log th {
    color: var(--muted); font-weight: 600; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em;
    background: var(--bg-top);
    position: sticky; top: 0;
}

table.log td.num { text-align: right; font-variant-numeric: tabular-nums; }
table.log td.weight, table.log td.trend { font-family: var(--mono); }
table.log td.trend { color: var(--muted); }
table.log td.var-pos { color: var(--danger); font-family: var(--mono); }
table.log td.var-neg { color: var(--success); font-family: var(--mono); }

table.log tr.clickable { cursor: pointer; }
table.log tr.clickable:hover { background: var(--accent-soft); }
table.log tr.today { background: var(--accent-soft); }
table.log tr.today td:first-child::before { content: "●"; color: var(--accent); margin-right: 0.35rem; }

table.log tr.weekend td:first-child { color: var(--muted); }

/* --- Chart containers --- */

.chart-wrap { background: var(--bg-elev); border: 1px solid var(--border-soft); border-radius: var(--radius); padding: 0.5rem 0.5rem 0.25rem; margin-bottom: 1rem; box-shadow: var(--shadow-sm); }
.chart-wrap.tight { padding: 0.25rem; }
.chart-wrap svg { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }

/* Toggleable SVG groups. JS flips these classes on .chart-wrap. */
.chart-wrap.hide-trend    .hd-trend    { display: none; }
.chart-wrap.hide-drops    .hd-drops    { display: none; }
.chart-wrap.hide-plan     .hd-plan     { display: none; }
.chart-wrap.hide-diamonds .hd-diamonds { display: none; }

.chart-opts {
    display: flex; flex-wrap: wrap; gap: 0.6rem 1rem; align-items: center;
    font-size: 0.82rem; color: var(--muted);
    padding: 0 0.5rem 0.35rem;
}
.chart-opts label { display: inline-flex; align-items: center; gap: 0.35rem; cursor: pointer; }
.chart-opts input { margin: 0; }

/* The legend sits below the chart SVG. We indent it to roughly align with
 * the plot area left edge (which is the SVG's left margin).
 */
.chart-legend { display: flex; flex-wrap: wrap; gap: 1rem; font-size: 0.75rem; color: var(--muted); padding: 0.35rem 0.5rem 0.35rem 4rem; }
.chart-legend .sw {
    display: inline-block; width: 10px; height: 10px; margin-right: 0.4rem; vertical-align: middle; border-radius: 2px;
    border: 1px solid rgba(0,0,0,0.05);
}
.chart-legend .sw.line { height: 2px; border-radius: 1px; }
.chart-legend .sw.dash { background: transparent; border-top: 2px dashed currentColor; height: 0; width: 16px; border-radius: 0; }
.chart-legend .sw.diamond { transform: rotate(45deg); width: 8px; height: 8px; border-radius: 0; }

.month-nav { display: flex; gap: 0.5rem; align-items: center; margin-bottom: 0.75rem; flex-wrap: wrap; }
.month-nav .title { flex: 1 1 auto; font-weight: 600; font-size: 1.15rem; letter-spacing: -0.01em; }

/* --- Stats grid --- */

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 0.75rem; margin-bottom: 1.25rem; }
.stat-grid.pair { grid-template-columns: repeat(2, 1fr); } /* 2-col grid for the side panel */
.stat { background: var(--bg-elev); border: 1px solid var(--border-soft); border-radius: var(--radius); padding: 0.9rem 1rem; box-shadow: var(--shadow-sm); }
.stat .label { font-size: 0.72rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; font-weight: 600; }
.stat .value { font-size: 1.35rem; font-weight: 600; font-family: var(--mono); letter-spacing: -0.02em; margin-top: 0.2rem; }
.stat .sub { font-size: 0.8rem; color: var(--muted); margin-top: 0.1rem; }
.stat .value.up { color: var(--danger); }
.stat .value.down { color: var(--success); }

/* Dashboard "body": chart on the left, stat panel + progress on the right on desktop. */
.dash-body {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, 340px);
    gap: 1rem;
    margin-bottom: 1.25rem;
    align-items: stretch;
}
.dash-side { display: flex; flex-direction: column; min-width: 0; }
@media (max-width: 820px) {
    .dash-body { grid-template-columns: 1fr; }
    .stat-grid.pair { grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); }
}

/* Segmented control — tiny pill-style toggle. Used for Weight/BMI, etc. */
.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; }
.seg .seg-btn {
    background: transparent; color: var(--muted); border: none; padding: 0.25rem 0.7rem;
    font-size: 0.72rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em;
    cursor: pointer; border-radius: 0;
}
.seg .seg-btn.active { background: var(--accent); color: var(--accent-fg); }
.seg .seg-btn:hover { filter: none; background: var(--accent-soft); }
.seg .seg-btn.active:hover { background: var(--accent); }

/* --- Today card (dashboard entry) --- */

/* Today card — the primary call-to-action. Compact: the weight display and
 * the entry form sit in the same row; the trend snapshot anchors the right
 * edge. Stacks on mobile. Matches the body width — no narrower max-width. */
.today-card {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.2rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 1rem;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 1rem 1.5rem;
    align-items: center;
}
.today-card .prompt { font-size: 0.72rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; }
.today-card .today-date { font-size: 1.1rem; font-weight: 600; letter-spacing: -0.01em; margin: 0.1rem 0 0.4rem; }
.today-card form { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; margin-top: 0.5rem; }
.today-card form input[type=text],
.today-card form input[type=number] { width: 7rem; font-size: 1rem; font-family: var(--mono); }
.today-card .logged {
    font-size: 1.7rem; font-weight: 700; font-family: var(--mono); letter-spacing: -0.02em; display: inline-block;
}
.today-card .logged .unit { font-size: 0.85rem; color: var(--muted); margin-left: 0.2rem; font-weight: 500; }
.today-card .trend-snapshot { text-align: right; }
.today-card .trend-snapshot .label { font-size: 0.72rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; }
.today-card .trend-snapshot .value { font-size: 1.25rem; font-weight: 600; font-family: var(--mono); letter-spacing: -0.01em; margin-top: 0.1rem; }
.today-card .trend-snapshot .value .unit { font-size: 0.75rem; color: var(--muted); margin-left: 0.2rem; font-weight: 500; }

@media (max-width: 640px) {
    .today-card { grid-template-columns: 1fr; padding: 0.9rem 1rem; gap: 0.75rem; }
    .today-card .trend-snapshot { text-align: left; display: flex; align-items: baseline; gap: 0.6rem; }
    .today-card .trend-snapshot .label,
    .today-card .trend-snapshot .value { display: inline; }
    .today-card form { flex-wrap: wrap; }
    .today-card form input[type=text] { flex: 1 1 100%; min-width: 0; }
}

/* --- Progress bar (goal) --- */

.progress { background: var(--border); border-radius: 999px; height: 8px; overflow: hidden; margin: 0.5rem 0; }
.progress .fill { background: var(--accent); height: 100%; transition: width 0.3s; }

/* --- Side-panel editor --- */

.editor-panel {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(420px, 100%);
    background: var(--bg-elev);
    border-left: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    z-index: 50;
    padding: 1.25rem 1.25rem 2rem;
    overflow-y: auto;
}
.editor-panel h2 { margin-top: 0; }
.editor-panel .close { background: transparent; color: var(--muted); border: none; font-size: 1.3rem; padding: 0; cursor: pointer; }
.editor-backdrop {
    position: fixed; inset: 0; background: rgba(46,52,64,0.3); z-index: 40;
}

/* --- Utility --- */

.hidden { display: none !important; }

.kbd {
    font-family: var(--mono); font-size: 0.75em; padding: 0.12em 0.4em;
    border: 1px solid var(--border); border-radius: 3px; background: var(--bg-top); color: var(--fg); margin: 0 0.15em;
}

/* --- Landing page (public, unauthed) --- */

.landing { display: flex; flex-direction: column; gap: 1.5rem; padding: 2rem 0; min-height: 80vh; }

.landing-card {
    background: var(--bg-elev);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 2.5rem 2.25rem;
    box-shadow: var(--shadow-md);
    max-width: 720px;
    width: 100%;
    margin: 0 auto;
}

.landing-card .brand-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1.5rem; }
.landing-card .brand { font-size: 1.4rem; font-weight: 700; letter-spacing: -0.01em; }
.landing-card .beta {
    font-size: 0.65rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em;
    color: var(--accent-fg); background: var(--accent);
    padding: 0.2rem 0.55rem; border-radius: 999px;
}

.landing-card h1 {
    font-size: 1.75rem; line-height: 1.25; letter-spacing: -0.02em; margin: 0 0 0.75rem;
    font-weight: 700;
}

.landing-card .lede { font-size: 1rem; color: var(--fg-soft); margin: 0 0 1.75rem; }

.landing-card .features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
    padding: 1.25rem 0;
    border-top: 1px solid var(--border-soft);
    border-bottom: 1px solid var(--border-soft);
}
.landing-card .features h3 {
    color: var(--accent); margin: 0 0 0.35rem; font-size: 0.78rem;
    text-transform: uppercase; letter-spacing: 0.06em; font-weight: 600;
}
.landing-card .features p { margin: 0; font-size: 0.9rem; color: var(--fg-soft); line-height: 1.45; }

.landing-card .cta p { margin: 0 0 0.5rem; }
.landing-card .cta p:last-child { margin-bottom: 0; }

.landing-foot {
    text-align: center; font-size: 0.78rem; color: var(--muted);
    display: flex; justify-content: center; gap: 0.5rem;
}

@media (max-width: 640px) {
    .landing-card { padding: 1.5rem 1.25rem; }
    .landing-card h1 { font-size: 1.4rem; }
}

/* uPlot + Nord theme overrides */
.uplot, .u-wrap { color: var(--fg); }
.u-axis { color: var(--muted); }
.u-legend { color: var(--fg); font-family: var(--sans); font-size: 0.82rem; }
.u-select { background: rgba(94,129,172,0.15); }