@import url('https://fonts.googleapis.com/css2?family=Google+Sans+Flex:wght@400;500;700&display=swap');

/* ========================================================
   Material 3 Expressive Design Tokens
   ======================================================== */
:root {
    --md-sys-color-primary: #6750A4;
    --md-sys-color-on-primary: #ffffff;
    --md-sys-color-primary-container: #EADDFF;
    --md-sys-color-on-primary-container: #21005D;
    --md-sys-color-secondary-container: #E8DEF8;
    --md-sys-color-secondary:#acebac;
    --md-sys-color-background: #FEF7FF;
    --md-sys-color-on-background: #1D1B20;
    
    --md-sys-color-surface: #F3EDF7;
    --md-sys-color-surface-variant: #E7E0EC;
    --md-sys-color-on-surface-variant: #49454F;

    /* Expressive Shapes - Extremely rounded */
    --md-sys-shape-corner-extra-large: 28px;
    --md-sys-shape-corner-large: 20px;
    
    /* Override Material Web Components Defaults */
    --md-filled-button-container-shape: 35px;
    --md-outlined-button-container-shape: 35px;
    --md-filled-tonal-button-container-shape: 30px;
    --md-text-button-container-shape: 30px;
    --md-outlined-text-field-container-shape: 16px;
    --md-checkbox-container-shape: 6px;
    --md-ref-typeface-brand: 'Google Sans Flex';
    --md-ref-typeface-plain: Google Sans Flex;
    --md-sys-typescale-body-medium-size: 14px;
}

/* ========================================================
   Base Reset & Typography
   ======================================================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body.m3-expressive-app {
    font-family: 'Google Sans Flex', system-ui, sans-serif;
    background-color: var(--md-sys-color-background);
    color: var(--md-sys-color-on-background);
    height: 100vh;
    overflow: hidden;
}

/* ========================================================
   App Layout
   ======================================================== */
.app-layout {
    display: flex;
    height: 100vh;
    padding: 1rem;
    gap: 1rem;
}

.sidebar {
    width: 260px;
    background: var(--md-sys-color-surface);
    border-radius: var(--md-sys-shape-corner-extra-large);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.app-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--md-sys-color-primary);
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-item {
    width: 100%;
    --md-text-button-label-text-size: 1.1rem;
    --md-text-button-container-height: 48px;
    justify-content: flex-start;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    overflow-y: auto;
    padding-right: 1rem;
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--md-sys-color-surface-variant);
    border-radius: var(--md-sys-shape-corner-extra-large);
}

.top-bar h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

/* ========================================================
   Expressive Cards & Content
   ======================================================== */
.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    padding-bottom: 2rem;
}

.m3-card {
    background: var(--md-sys-color-surface);
    border-radius: var(--md-sys-shape-corner-extra-large);
    padding: 2rem;
    display: flex;
    flex-direction: column;
}

.hero-card {
    background: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    grid-column: 1 / -1;
}

.card-content h3 {
    font-size: 1.35rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.expressive-divider {
    border: 0;
    height: 2px;
    background: var(--md-sys-color-secondary-container);
    margin: 1.5rem 0;
    border-radius: 2px;
}

/* HTML Demo Box */
.html-demo-box {
    background: rgba(255,255,255,0.4);
    padding: 1.5rem;
    border-radius: var(--md-sys-shape-corner-large);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.html-demo-box > * { margin: 0; }
.block-demo-title { font-size: 1.25rem; font-weight: 700; margin-top: 1rem; }
.m3-link { color: var(--md-sys-color-primary); font-weight: 500; text-decoration: none; }
.m3-link:hover { text-decoration: underline; }

/* Forms */
.m3-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}
.full-width { width: 100%; }
.m3-checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 500;
    cursor: pointer;
}

/* Animation Buttons Container */
.flex-group-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1rem;
}

/* Color Blocks Divs */
.color-blocks-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
}

.color-block {
    padding: 1.5rem;
    border-radius: var(--md-sys-shape-corner-large);
    font-weight: 500;
    text-align: center;
}

.color-block.filled {
    background-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
}

.color-block.bordered {
    background-color: transparent;
    border: 2px solid var(--md-sys-color-primary);
    color: var(--md-sys-color-primary);
}

.color-block.patterned {
    background: repeating-linear-gradient(
        45deg,
        var(--md-sys-color-surface-variant),
        var(--md-sys-color-surface-variant) 10px,
        var(--md-sys-color-surface) 10px,
        var(--md-sys-color-surface) 20px
    );
    color: var(--md-sys-color-on-background);
}