/* Global variables for theming */
:root {
    /* Light Theme (Default) */
    --app-bg-color: #FEF7FF; /* Material 3 Surface */
    --app-text-color: #1D1B20; /* Material 3 On Surface */
    --app-surface-color: #FDFCFB; /* Material 3 Surface Container Low */
    --app-primary-color: #6750A4; /* Material 3 Primary */
    --app-on-primary-color: #FFFFFF;
    --app-secondary-color: #625B71; /* Material 3 Secondary */
    --app-outline-color: #79747E; /* Material 3 Outline */
    --app-note-card-bg: #EADDFF; /* Material 3 Primary Container */
    --app-note-card-text: #21005D; /* Material 3 On Primary Container */
    --app-note-card-header: var(--app-primary-color); /* Or #1D192B for On Surface */

    /* MWC Theme Token Mapping */
    --md-sys-color-background: var(--app-bg-color);
    --md-sys-color-on-background: var(--app-text-color);
    --md-sys-color-surface: var(--app-surface-color);
    --md-sys-color-surface-dim: #DED8E1; /* Example, add more as needed */
    --md-sys-color-surface-bright: #FEF7FF;
    --md-sys-color-surface-container-lowest: #FFFFFF;
    --md-sys-color-surface-container-low: #F7F2FA;
    --md-sys-color-surface-container: #F3EDF7;
    --md-sys-color-surface-container-high: #ECE6F0;
    --md-sys-color-surface-container-highest: #E6E0E9; /* Was used for note cards */
    --md-sys-color-surface-variant: #E7E0EC;
    --md-sys-color-on-surface: var(--app-text-color);
    --md-sys-color-on-surface-variant: #49454F;
    --md-sys-color-primary: var(--app-primary-color);
    --md-sys-color-on-primary: var(--app-on-primary-color);
    --md-sys-color-secondary: var(--app-secondary-color);
    --md-sys-color-on-secondary: #FFFFFF;
    --md-sys-color-tertiary: #7D5260;
    --md-sys-color-on-tertiary: #FFFFFF;
    --md-sys-color-error: #B3261E;
    --md-sys-color-on-error: #FFFFFF;
    --md-sys-color-outline: var(--app-outline-color);
    --md-sys-color-shadow: #000000;
    --md-sys-color-surface-tint-color: var(--app-primary-color); /* Alias for primary */


    /* Expressive shape tokens */
    --md-sys-shape-corner-extra-small: 4px;
    --md-sys-shape-corner-small: 8px;
    --md-sys-shape-corner-medium: 12px;
    --md-sys-shape-corner-large: 16px; /* Used for cards */
    --md-sys-shape-corner-extra-large: 28px; /* Used for dialogs */
    --md-sys-shape-corner-full: 9999px; /* For fully rounded elements like FAB */
}

body.dark-theme {
    /* Dark Theme Overrides */
    --app-bg-color: #141218;
    --app-text-color: #E6E0E9;
    --app-surface-color: #1C1B1F; /* Material 3 Surface Container Low (Dark) */
    --app-primary-color: #D0BCFF;
    --app-on-primary-color: #381E72;
    --app-secondary-color: #CCC2DC;
    --app-outline-color: #938F99;
    --app-note-card-bg: #4A4458; /* Material 3 Primary Container (Dark) - example, adjust to preference */
    --app-note-card-text: #E8DEF8; /* Material 3 On Primary Container (Dark) */
    --app-note-card-header: var(--app-primary-color);

    /* MWC Dark Theme Token Mapping (subset, repeat for all relevant tokens) */
    --md-sys-color-surface-dim: #141218;
    --md-sys-color-surface-bright: #3B383E;
    --md-sys-color-surface-container-lowest: #0F0D13;
    --md-sys-color-surface-container-low: #1D1B20;
    --md-sys-color-surface-container: #211F26;
    --md-sys-color-surface-container-high: #2B2930;
    --md-sys-color-surface-container-highest: #36343B;
    --md-sys-color-on-secondary: #332D41;
    --md-sys-color-on-tertiary: #492532;
    --md-sys-color-on-error: #601410;
    --md-sys-color-surface-tint-color: var(--app-primary-color);
}

/* Apply MWC tokens for body styles */
body {
    font-family: 'Roboto', sans-serif; /* Already set in head style */
    margin: 0;
    background-color: var(--md-sys-color-background);
    color: var(--md-sys-color-on-background);
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 16px;
}

header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 16px;
    margin-bottom: 20px;
}
header h1 {
    margin: 0;
    color: var(--md-sys-color-primary);
    font-size: 2em; /* More prominent title */
}
#themeToggleBtn md-icon {
    color: var(--md-sys-color-secondary); /* Themed icon color */
}

/* Note Card Styling */
.note-card {
    margin-bottom: 16px;
    padding: 16px;
    border-radius: var(--md-sys-shape-corner-large); /* Expressive rounding via token */
    background-color: var(--app-note-card-bg);
    color: var(--app-note-card-text);
    position: relative;
    /* box-shadow: 0 1px 3px rgba(0,0,0,0.05), 0 2px 8px rgba(0,0,0,0.1); MWC Elevation handles this */
    overflow: hidden;
}
.note-card md-elevation { /* This applies the standard MWC shadow */
    --md-elevation-level: 1;
}

.note-card h3 {
    margin-top: 0;
    margin-bottom: 8px;
    color: var(--app-note-card-header);
    font-size: 1.25em;
    font-weight: 500;
}

.note-card p {
    margin-bottom: 8px;
    white-space: pre-wrap;
    font-size: 0.95em;
    line-height: 1.5;
}

.note-card-actions {
    position: absolute;
    top: 8px;
    right: 8px;
    display: flex;
}
.note-card-actions md-icon-button {
    --md-icon-button-icon-color: var(--app-note-card-text);
}
.note-card-actions md-icon-button:hover {
    --md-icon-button-icon-color: var(--app-primary-color);
}

/* FAB Styling (MWC theming should mostly handle this) */
md-fab {
    position: fixed;
    bottom: 24px;
    right: 24px;
    /* --md-fab-container-shape: var(--md-sys-shape-corner-large); /* Example of shape override if not default */
}

/* Dialog Styling */
md-dialog {
    /* MWC sets its own width, can be overridden with --md-dialog-container-min-width etc. */
    /* border-radius: var(--md-sys-shape-corner-extra-large); /* MWC default or use --md-dialog-container-shape */
    --md-dialog-container-color: var(--md-sys-color-surface-container-high); /* Themed dialog bg */
    --md-dialog-headline-color: var(--md-sys-color-on-surface-variant);
    --md-dialog-supporting-text-color: var(--md-sys-color-on-surface-variant);
}
md-dialog [slot="headline"] {
    font-size: 1.5em;
    font-weight: 500;
    /* color: var(--md-sys-color-primary); /* Already set by --md-dialog-headline-color or inherited */
}

/* Placeholder text for empty notes list */
#notesList > p {
    text-align: center;
    color: var(--md-sys-color-outline);
    padding: 20px 0;
    font-size: 1.1em;
}