/* 
 * References:
 * "The 80% of UI Design - Typography" https://www.youtube.com/watch?v=9-oefwZ6Z74
 * "Modular scale" https://design-system.economist.com/foundations/typography/modular-scale#type-scale
 * "Line-height" https://design-system.economist.com/foundations/typography/line-height#multipliers
 * "Responsive And Fluid Typography With vh And vw Units" https://www.smashingmagazine.com/2016/05/fluid-typography/
 */

:root {
    color-scheme: light dark;

    /* https://tailwindcss.com/docs/colors */
    /* https://gist.github.com/guvener/d8952570d5a8be430580b93800519439 */
    --neutral-50: light-dark(#FAFAFA, #171717);
    --neutral-100: light-dark(#F5F5F5, #262626);
    --neutral-200: light-dark(#E5E5E5, #404040);
    --neutral-300: light-dark(#D4D4D4, #525252);
    --neutral-400: light-dark(#A3A3A3, #737373);
    --neutral-500: light-dark(#737373, #A3A3A3);
    --neutral-600: light-dark(#525252, #D4D4D4);
    --neutral-700: light-dark(#404040, #E5E5E5);
    --neutral-800: light-dark(#262626, #F5F5F5);
    --neutral-900: light-dark(#171717, #FAFAFA);
    --red-100: light-dark(#FEE2E2, #450A0A);
    --red-500: #EF4444;
    --red-600: light-dark(#DC2626, #991B1B);
    --red-700: #B91C1C;
    --orange-100: light-dark(#FFEDD5, #431407);
    --orange-500: #F97316;
    --orange-600: light-dark(#EA580C, #C2410C);
    --yellow-100: light-dark(#FEF9C3, #A16207);
    --yellow-400: #CA8A04;
    --yellow-500: #EAB308;
    --green-100: light-dark(#DCFCE7, #052E16);
    --green-500: #22C55E;
    --green-600: light-dark(#16A34A, #15803D);
    --teal-100: light-dark(#CCFBF1, #042F2E);
    --teal-500: #14B8A6;
    --teal-600: light-dark(#0D9488, #0F766E);
    --blue-100: light-dark(#DBEAFE, #172554);
    --blue-500: #3B82F6;
    --blue-600: light-dark(#2563EB, #1D4ED8);
    --purple-100: light-dark(#EDE9FE, #2E1065);
    --purple-500: #8B5CF6;
    --purple-600: light-dark(#7C3AED, #6D28D9);
    --pink-100: light-dark(#FCE7F3, #500724);
    --pink-500: #EC4899;
    --pink-600: light-dark(#DB2777, #BE185D);

    /* typography */
    /* Major Second */
    --font-scale: 1.125;
    --font-family: ui-sans-serif, system-ui, sans-serif;
    --font-family-code: ui-monospace, monospace;
    /* 1rem * pow(var(--font-scale), 6) */
    --h1: 600 2.027rem/1.2 var(--font-family);
    /* 1rem * pow(var(--font-scale), 5) */
    --h2: 600 1.802rem/1.2 var(--font-family);
    /* 1rem * pow(var(--font-scale), 4) */
    --h3: 600 1.602rem/1.2 var(--font-family);
    /* 1rem * pow(var(--font-scale), 3) */
    --h4: 600 1.424rem/1.2 var(--font-family);
    /* 1rem * pow(var(--font-scale), 2) */
    --h5: 600 1.266rem/1.2 var(--font-family);
    /* 1rem * pow(var(--font-scale), 1) */
    --h6: 600 1.125rem/1.2 var(--font-family);
    /* https://m3.material.io/styles/typography/applying-type */
    --p1: normal 1rem/1.5 var(--font-family);
    /* 1rem / var(--font-scale) */
    --sm: normal 0.889rem/1.4 var(--font-family);
    /* 1rem / pow(var(--font-scale), 2) */
    --xs: normal 0.79rem/1.4 var(--font-family);
    --code: normal 0.889rem/1.4 var(--font-family-code);
    --xs-code: normal 0.79rem/1.4 var(--font-family-code);
    --p1-code: normal 1rem/1.5 var(--font-family-code);

    /* spacing - 4px-based system */
    /* https://medium.com/dwarves-design/the-principle-of-spacing-in-ui-design-part-1-3354d0d65e51 */
    --spacing-1: 4px;
    --spacing-2: 8px;
    --spacing-3: 12px;
    --spacing-4: 16px;
    --spacing-5: 20px;
    --spacing-6: 24px;
    --spacing-8: 32px;

    /* elevation */
    --shadow-1: rgba(0, 0, 0, 0.01) 0px 1px 3px 0px, rgba(0, 0, 0, 0.10) 0px 1px 3px 0px;
    --shadow-2: rgba(0, 0, 0, 0.10) 0px 1px 3px 0px, rgba(0, 0, 0, 0.10) 0px 1px 3px 0px;
    /* tailwind #37 https://getcssscan.com/css-box-shadow-examples */
    --shadow-3: rgba(0, 0, 0, 0.1) 0px 4px 6px -1px, rgba(0, 0, 0, 0.06) 0px 2px 4px -1px;
    /* tailwind #38 https://getcssscan.com/css-box-shadow-examples */
    --shadow-4: rgba(0, 0, 0, 0.1) 0px 10px 15px -3px, rgba(0, 0, 0, 0.05) 0px 4px 6px -2px;
    /* tailwind #40 https://getcssscan.com/css-box-shadow-examples */
    --shadow-5: light-dark(
        rgba(0, 0, 0, 0.25) 0px 25px 50px -12px,
        rgba(0, 0, 0, 0.5) 0px 25px 50px -12px
    );
    --shadow-6: light-dark(
        rgba(0, 0, 0, 0.1) 0px -10px 15px -3px,
        rgba(0, 0, 0, 0.3) 0px -10px 15px -3px
    );

    /* globals */
    --mobile-navbar-height: 60px;
    --safe-area-bottom: env(safe-area-inset-bottom, 0px);

    /* z-index layers */
    --z-base: 1;
    --z-modal: 2;
    --z-popover: 3;
    --z-critical: 4;

    /* border radius */
    --radius-1: 4px;
    --radius-2: 8px;
    --radius-full: 9999px;

    /* icon sizing - svg.lucide */
    --icon-sm: 16px;
    --icon-md: 20px;

    /* layout dimensions */
    --sidebar-width: 220px;
    --notes-list-width: 280px;
    --notes-editor-max-width: 850px;
    --sidepanel-width: 360px;

    /* transitions */
    --transition-fast: 150ms;
    --transition-normal: 300ms;

    /* text colors */
    --text-primary: var(--neutral-700);
    --text-secondary: var(--neutral-400);
    --bg-primary: light-dark(#FFF, #121212);
    --bg-secondary: var(--neutral-50);
    --bg-tertiary: var(--neutral-100);

    /*
     * Tag colors, derived from the Tailwind 500 of each hue: saturation is
     * scaled down and lightness pinned per role, so a colored tag carries hue
     * without reading louder than a plain one. To add a color, add its
     * --<name>-500 above and copy one of these five-line groups.
     */
    --tag-red-text: light-dark(
        hsl(from var(--red-500) h calc(s * 0.53) 64.0%),
        hsl(from var(--red-500) h calc(s * 0.48) 44.0%)
    );
    --tag-red-text-hover: light-dark(
        hsl(from var(--red-500) h calc(s * 0.48) 44.0%),
        hsl(from var(--red-500) h calc(s * 0.53) 64.0%)
    );
    --tag-red-bg: light-dark(
        hsl(from var(--red-500) h s 95.5%),
        hsl(from var(--red-500) h calc(s * 0.44) 14.8%)
    );
    --tag-red-bg-hover: light-dark(
        hsl(from var(--red-500) h calc(s * 0.62) 90.3%),
        hsl(from var(--red-500) h calc(s * 0.26) 25.3%)
    );
    --tag-red-remove-hover: light-dark(
        hsl(from var(--red-500) h calc(s * 0.35) 83.7%),
        hsl(from var(--red-500) h calc(s * 0.21) 32.4%)
    );
    --tag-orange-text: light-dark(
        hsl(from var(--orange-500) h calc(s * 0.53) 64.0%),
        hsl(from var(--orange-500) h calc(s * 0.48) 44.0%)
    );
    --tag-orange-text-hover: light-dark(
        hsl(from var(--orange-500) h calc(s * 0.48) 44.0%),
        hsl(from var(--orange-500) h calc(s * 0.53) 64.0%)
    );
    --tag-orange-bg: light-dark(
        hsl(from var(--orange-500) h s 95.5%),
        hsl(from var(--orange-500) h calc(s * 0.44) 14.8%)
    );
    --tag-orange-bg-hover: light-dark(
        hsl(from var(--orange-500) h calc(s * 0.62) 90.3%),
        hsl(from var(--orange-500) h calc(s * 0.26) 25.3%)
    );
    --tag-orange-remove-hover: light-dark(
        hsl(from var(--orange-500) h calc(s * 0.35) 83.7%),
        hsl(from var(--orange-500) h calc(s * 0.21) 32.4%)
    );
    --tag-yellow-text: light-dark(
        hsl(from var(--yellow-500) h calc(s * 0.53) 64.0%),
        hsl(from var(--yellow-500) h calc(s * 0.48) 44.0%)
    );
    --tag-yellow-text-hover: light-dark(
        hsl(from var(--yellow-500) h calc(s * 0.48) 44.0%),
        hsl(from var(--yellow-500) h calc(s * 0.53) 64.0%)
    );
    --tag-yellow-bg: light-dark(
        hsl(from var(--yellow-500) h s 95.5%),
        hsl(from var(--yellow-500) h calc(s * 0.44) 14.8%)
    );
    --tag-yellow-bg-hover: light-dark(
        hsl(from var(--yellow-500) h calc(s * 0.62) 90.3%),
        hsl(from var(--yellow-500) h calc(s * 0.26) 25.3%)
    );
    --tag-yellow-remove-hover: light-dark(
        hsl(from var(--yellow-500) h calc(s * 0.35) 83.7%),
        hsl(from var(--yellow-500) h calc(s * 0.21) 32.4%)
    );
    --tag-green-text: light-dark(
        hsl(from var(--green-500) h calc(s * 0.53) 64.0%),
        hsl(from var(--green-500) h calc(s * 0.48) 44.0%)
    );
    --tag-green-text-hover: light-dark(
        hsl(from var(--green-500) h calc(s * 0.48) 44.0%),
        hsl(from var(--green-500) h calc(s * 0.53) 64.0%)
    );
    --tag-green-bg: light-dark(
        hsl(from var(--green-500) h s 95.5%),
        hsl(from var(--green-500) h calc(s * 0.44) 14.8%)
    );
    --tag-green-bg-hover: light-dark(
        hsl(from var(--green-500) h calc(s * 0.62) 90.3%),
        hsl(from var(--green-500) h calc(s * 0.26) 25.3%)
    );
    --tag-green-remove-hover: light-dark(
        hsl(from var(--green-500) h calc(s * 0.35) 83.7%),
        hsl(from var(--green-500) h calc(s * 0.21) 32.4%)
    );
    --tag-teal-text: light-dark(
        hsl(from var(--teal-500) h calc(s * 0.53) 64.0%),
        hsl(from var(--teal-500) h calc(s * 0.48) 44.0%)
    );
    --tag-teal-text-hover: light-dark(
        hsl(from var(--teal-500) h calc(s * 0.48) 44.0%),
        hsl(from var(--teal-500) h calc(s * 0.53) 64.0%)
    );
    --tag-teal-bg: light-dark(
        hsl(from var(--teal-500) h s 95.5%),
        hsl(from var(--teal-500) h calc(s * 0.44) 14.8%)
    );
    --tag-teal-bg-hover: light-dark(
        hsl(from var(--teal-500) h calc(s * 0.62) 90.3%),
        hsl(from var(--teal-500) h calc(s * 0.26) 25.3%)
    );
    --tag-teal-remove-hover: light-dark(
        hsl(from var(--teal-500) h calc(s * 0.35) 83.7%),
        hsl(from var(--teal-500) h calc(s * 0.21) 32.4%)
    );
    --tag-blue-text: light-dark(
        hsl(from var(--blue-500) h calc(s * 0.53) 64.0%),
        hsl(from var(--blue-500) h calc(s * 0.48) 44.0%)
    );
    --tag-blue-text-hover: light-dark(
        hsl(from var(--blue-500) h calc(s * 0.48) 44.0%),
        hsl(from var(--blue-500) h calc(s * 0.53) 64.0%)
    );
    --tag-blue-bg: light-dark(
        hsl(from var(--blue-500) h s 95.5%),
        hsl(from var(--blue-500) h calc(s * 0.44) 14.8%)
    );
    --tag-blue-bg-hover: light-dark(
        hsl(from var(--blue-500) h calc(s * 0.62) 90.3%),
        hsl(from var(--blue-500) h calc(s * 0.26) 25.3%)
    );
    --tag-blue-remove-hover: light-dark(
        hsl(from var(--blue-500) h calc(s * 0.35) 83.7%),
        hsl(from var(--blue-500) h calc(s * 0.21) 32.4%)
    );
    --tag-purple-text: light-dark(
        hsl(from var(--purple-500) h calc(s * 0.53) 64.0%),
        hsl(from var(--purple-500) h calc(s * 0.48) 44.0%)
    );
    --tag-purple-text-hover: light-dark(
        hsl(from var(--purple-500) h calc(s * 0.48) 44.0%),
        hsl(from var(--purple-500) h calc(s * 0.53) 64.0%)
    );
    --tag-purple-bg: light-dark(
        hsl(from var(--purple-500) h s 95.5%),
        hsl(from var(--purple-500) h calc(s * 0.44) 14.8%)
    );
    --tag-purple-bg-hover: light-dark(
        hsl(from var(--purple-500) h calc(s * 0.62) 90.3%),
        hsl(from var(--purple-500) h calc(s * 0.26) 25.3%)
    );
    --tag-purple-remove-hover: light-dark(
        hsl(from var(--purple-500) h calc(s * 0.35) 83.7%),
        hsl(from var(--purple-500) h calc(s * 0.21) 32.4%)
    );
    --tag-pink-text: light-dark(
        hsl(from var(--pink-500) h calc(s * 0.53) 64.0%),
        hsl(from var(--pink-500) h calc(s * 0.48) 44.0%)
    );
    --tag-pink-text-hover: light-dark(
        hsl(from var(--pink-500) h calc(s * 0.48) 44.0%),
        hsl(from var(--pink-500) h calc(s * 0.53) 64.0%)
    );
    --tag-pink-bg: light-dark(
        hsl(from var(--pink-500) h s 95.5%),
        hsl(from var(--pink-500) h calc(s * 0.44) 14.8%)
    );
    --tag-pink-bg-hover: light-dark(
        hsl(from var(--pink-500) h calc(s * 0.62) 90.3%),
        hsl(from var(--pink-500) h calc(s * 0.26) 25.3%)
    );
    --tag-pink-remove-hover: light-dark(
        hsl(from var(--pink-500) h calc(s * 0.35) 83.7%),
        hsl(from var(--pink-500) h calc(s * 0.21) 32.4%)
    );
}

/*
 * light-dark() takes exactly two arguments, so the four shadows whose value is itself
 * a comma-separated list of two shadows cannot use it. They keep per-theme blocks.
 */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --shadow-1: rgba(0, 0, 0, 0.2) 0px 1px 3px 0px, rgba(0, 0, 0, 0.3) 0px 1px 3px 0px;
        --shadow-2: rgba(0, 0, 0, 0.3) 0px 1px 3px 0px, rgba(0, 0, 0, 0.3) 0px 1px 3px 0px;
        --shadow-3: rgba(0, 0, 0, 0.3) 0px 4px 6px -1px, rgba(0, 0, 0, 0.2) 0px 2px 4px -1px;
        --shadow-4: rgba(0, 0, 0, 0.3) 0px 10px 15px -3px, rgba(0, 0, 0, 0.2) 0px 4px 6px -2px;
    }
}

/* Explicit theme overrides — light-dark() resolves off color-scheme */
[data-theme="light"] {
    color-scheme: light;
}

[data-theme="dark"] {
    color-scheme: dark;

    --shadow-1: rgba(0, 0, 0, 0.2) 0px 1px 3px 0px, rgba(0, 0, 0, 0.3) 0px 1px 3px 0px;
    --shadow-2: rgba(0, 0, 0, 0.3) 0px 1px 3px 0px, rgba(0, 0, 0, 0.3) 0px 1px 3px 0px;
    --shadow-3: rgba(0, 0, 0, 0.3) 0px 4px 6px -1px, rgba(0, 0, 0, 0.2) 0px 2px 4px -1px;
    --shadow-4: rgba(0, 0, 0, 0.3) 0px 10px 15px -3px, rgba(0, 0, 0, 0.2) 0px 4px 6px -2px;
}

* {
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizelegibility;
}

html {
    /* 1rem */
    font-size: 16px;
    height: 100%;
    overflow: hidden;
    margin: 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
}

body {
    display: flex;
    font: var(--p1);
    /* https://uxmovement.com/content/why-you-should-never-use-pure-black-for-text-or-backgrounds/ */
    color: var(--text-primary);
    background-color: var(--bg-primary);
    height: 100%;
    overflow: hidden;
    margin: 0;
}

svg.lucide {
    width: 36px;
    height: 36px;

    line,
    circle,
    rect,
    path {
        stroke-width: 2;
        stroke: var(--neutral-500);
    }
}

.page-container {
    display: flex;
    width: 100%;
    height: 100%;
    overflow: hidden;
    position: relative;

    &.is-editor-expanded {

        >.sidebar-container,
        >.notes-list-container {
            min-width: 0;
            width: 0;
            overflow: hidden;
            transition: min-width var(--transition-fast) ease, width var(--transition-fast) ease;
        }
    }
}

.button-container {
    display: flex;
    position: relative;
    padding: 0;
    border: 0;
    background: none;
}


.button-group {
    display: flex;
}

.tag {
    --tag-remove-bg-hover: var(--neutral-300);

    display: inline-flex;
    align-items: stretch;
    margin-right: var(--spacing-1);
    margin-bottom: var(--spacing-1);
    border-radius: var(--radius-1);
    color: var(--tag-text, var(--neutral-400));
    background-color: var(--tag-bg, var(--neutral-100));
    font: var(--sm);
    font-weight: 500;
    transition-property: color, background-color;
    transition-duration: var(--transition-normal);
    cursor: pointer;
    text-decoration: none;
    user-select: none;

    &:hover {
        color: var(--tag-text-hover, var(--neutral-500));
        background-color: var(--tag-bg-hover, var(--neutral-200));
    }

    &:active {
        transform: scale(0.97);
        transition: transform var(--transition-fast) ease-out;
    }

    &:not(.is-editable) {
        padding: var(--spacing-1) var(--spacing-2);
        align-items: center;
    }

    &.is-editable {
        cursor: default;

        .tag-label {
            display: flex;
            align-items: center;
            padding: var(--spacing-1) var(--spacing-2);
        }

        .tag-remove {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 30px;
            border-radius: var(--radius-1);
            border-top-left-radius: 0;
            border-bottom-left-radius: 0;
            cursor: pointer;
            transition: background-color var(--transition-normal);

            svg.lucide {
                height: 16px;
                width: 16px;

                line,
                circle,
                rect,
                path {
                    stroke: currentColor;
                }
            }

            &:hover {
                background-color: var(--tag-remove-bg-hover);
            }

            &:active {
                transform: scale(0.97);
                transition: transform var(--transition-fast) ease-out;
            }
        }
    }
}

/* Maps each palette color onto generic names that tag consumers read. */
.color-red {
    --tag-text: var(--tag-red-text);
    --tag-text-hover: var(--tag-red-text-hover);
    --tag-bg: var(--tag-red-bg);
    --tag-bg-hover: var(--tag-red-bg-hover);
    --tag-remove-bg-hover: var(--tag-red-remove-hover);
}

.color-orange {
    --tag-text: var(--tag-orange-text);
    --tag-text-hover: var(--tag-orange-text-hover);
    --tag-bg: var(--tag-orange-bg);
    --tag-bg-hover: var(--tag-orange-bg-hover);
    --tag-remove-bg-hover: var(--tag-orange-remove-hover);
}

.color-yellow {
    --tag-text: var(--tag-yellow-text);
    --tag-text-hover: var(--tag-yellow-text-hover);
    --tag-bg: var(--tag-yellow-bg);
    --tag-bg-hover: var(--tag-yellow-bg-hover);
    --tag-remove-bg-hover: var(--tag-yellow-remove-hover);
}

.color-green {
    --tag-text: var(--tag-green-text);
    --tag-text-hover: var(--tag-green-text-hover);
    --tag-bg: var(--tag-green-bg);
    --tag-bg-hover: var(--tag-green-bg-hover);
    --tag-remove-bg-hover: var(--tag-green-remove-hover);
}

.color-teal {
    --tag-text: var(--tag-teal-text);
    --tag-text-hover: var(--tag-teal-text-hover);
    --tag-bg: var(--tag-teal-bg);
    --tag-bg-hover: var(--tag-teal-bg-hover);
    --tag-remove-bg-hover: var(--tag-teal-remove-hover);
}

.color-blue {
    --tag-text: var(--tag-blue-text);
    --tag-text-hover: var(--tag-blue-text-hover);
    --tag-bg: var(--tag-blue-bg);
    --tag-bg-hover: var(--tag-blue-bg-hover);
    --tag-remove-bg-hover: var(--tag-blue-remove-hover);
}

.color-purple {
    --tag-text: var(--tag-purple-text);
    --tag-text-hover: var(--tag-purple-text-hover);
    --tag-bg: var(--tag-purple-bg);
    --tag-bg-hover: var(--tag-purple-bg-hover);
    --tag-remove-bg-hover: var(--tag-purple-remove-hover);
}

.color-pink {
    --tag-text: var(--tag-pink-text);
    --tag-text-hover: var(--tag-pink-text-hover);
    --tag-bg: var(--tag-pink-bg);
    --tag-bg-hover: var(--tag-pink-bg-hover);
    --tag-remove-bg-hover: var(--tag-pink-remove-hover);
}