/* ==========================================================================
   MATERIAL DESIGN 3 BASE - Layout, Typography, Core Components
   ========================================================================== */

/* Import Google Fonts - Roboto */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;700;900&family=Roboto+Flex:wght@400;500;700;900&display=swap');

/* ===== Global Reset ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--md-sys-typescale-font-family);
    font-size: var(--md-sys-typescale-body-medium-size);
    line-height: var(--md-sys-typescale-body-medium-line-height);
    font-weight: var(--md-sys-typescale-body-medium-weight);
    letter-spacing: var(--md-sys-typescale-body-medium-tracking);
    color: var(--md-sys-color-on-background);
    background-color: var(--md-sys-color-background);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===== MD3 Typography Classes ===== */

/* Display */
.md3-display-large {
    font-family: var(--md-sys-typescale-display-large-font);
    font-size: var(--md-sys-typescale-display-large-size);
    line-height: var(--md-sys-typescale-display-large-line-height);
    font-weight: var(--md-sys-typescale-display-large-weight);
    letter-spacing: var(--md-sys-typescale-display-large-tracking);
}

.md3-display-medium {
    font-family: var(--md-sys-typescale-display-medium-font);
    font-size: var(--md-sys-typescale-display-medium-size);
    line-height: var(--md-sys-typescale-display-medium-line-height);
    font-weight: var(--md-sys-typescale-display-medium-weight);
    letter-spacing: var(--md-sys-typescale-display-medium-tracking);
}

.md3-display-small {
    font-family: var(--md-sys-typescale-display-small-font);
    font-size: var(--md-sys-typescale-display-small-size);
    line-height: var(--md-sys-typescale-display-small-line-height);
    font-weight: var(--md-sys-typescale-display-small-weight);
    letter-spacing: var(--md-sys-typescale-display-small-tracking);
}

/* Headline */
.md3-headline-large {
    font-family: var(--md-sys-typescale-headline-large-font);
    font-size: var(--md-sys-typescale-headline-large-size);
    line-height: var(--md-sys-typescale-headline-large-line-height);
    font-weight: var(--md-sys-typescale-headline-large-weight);
    letter-spacing: var(--md-sys-typescale-headline-large-tracking);
}

.md3-headline-medium {
    font-family: var(--md-sys-typescale-headline-medium-font);
    font-size: var(--md-sys-typescale-headline-medium-size);
    line-height: var(--md-sys-typescale-headline-medium-line-height);
    font-weight: var(--md-sys-typescale-headline-medium-weight);
    letter-spacing: var(--md-sys-typescale-headline-medium-tracking);
}

.md3-headline-small {
    font-family: var(--md-sys-typescale-headline-small-font);
    font-size: var(--md-sys-typescale-headline-small-size);
    line-height: var(--md-sys-typescale-headline-small-line-height);
    font-weight: var(--md-sys-typescale-headline-small-weight);
    letter-spacing: var(--md-sys-typescale-headline-small-tracking);
}

/* Title */
.md3-title-large {
    font-family: var(--md-sys-typescale-title-large-font);
    font-size: var(--md-sys-typescale-title-large-size);
    line-height: var(--md-sys-typescale-title-large-line-height);
    font-weight: var(--md-sys-typescale-title-large-weight);
    letter-spacing: var(--md-sys-typescale-title-large-tracking);
}

.md3-title-medium {
    font-family: var(--md-sys-typescale-title-medium-font);
    font-size: var(--md-sys-typescale-title-medium-size);
    line-height: var(--md-sys-typescale-title-medium-line-height);
    font-weight: var(--md-sys-typescale-title-medium-weight);
    letter-spacing: var(--md-sys-typescale-title-medium-tracking);
}

.md3-title-small {
    font-family: var(--md-sys-typescale-title-small-font);
    font-size: var(--md-sys-typescale-title-small-size);
    line-height: var(--md-sys-typescale-title-small-line-height);
    font-weight: var(--md-sys-typescale-title-small-weight);
    letter-spacing: var(--md-sys-typescale-title-small-tracking);
}

/* Body */
.md3-body-large {
    font-family: var(--md-sys-typescale-body-large-font);
    font-size: var(--md-sys-typescale-body-large-size);
    line-height: var(--md-sys-typescale-body-large-line-height);
    font-weight: var(--md-sys-typescale-body-large-weight);
    letter-spacing: var(--md-sys-typescale-body-large-tracking);
}

.md3-body-medium {
    font-family: var(--md-sys-typescale-body-medium-font);
    font-size: var(--md-sys-typescale-body-medium-size);
    line-height: var(--md-sys-typescale-body-medium-line-height);
    font-weight: var(--md-sys-typescale-body-medium-weight);
    letter-spacing: var(--md-sys-typescale-body-medium-tracking);
}

.md3-body-small {
    font-family: var(--md-sys-typescale-body-small-font);
    font-size: var(--md-sys-typescale-body-small-size);
    line-height: var(--md-sys-typescale-body-small-line-height);
    font-weight: var(--md-sys-typescale-body-small-weight);
    letter-spacing: var(--md-sys-typescale-body-small-tracking);
}

/* Label */
.md3-label-large {
    font-family: var(--md-sys-typescale-label-large-font);
    font-size: var(--md-sys-typescale-label-large-size);
    line-height: var(--md-sys-typescale-label-large-line-height);
    font-weight: var(--md-sys-typescale-label-large-weight);
    letter-spacing: var(--md-sys-typescale-label-large-tracking);
}

.md3-label-medium {
    font-family: var(--md-sys-typescale-label-medium-font);
    font-size: var(--md-sys-typescale-label-medium-size);
    line-height: var(--md-sys-typescale-label-medium-line-height);
    font-weight: var(--md-sys-typescale-label-medium-weight);
    letter-spacing: var(--md-sys-typescale-label-medium-tracking);
}

.md3-label-small {
    font-family: var(--md-sys-typescale-label-small-font);
    font-size: var(--md-sys-typescale-label-small-size);
    line-height: var(--md-sys-typescale-label-small-line-height);
    font-weight: var(--md-sys-typescale-label-small-weight);
    letter-spacing: var(--md-sys-typescale-label-small-tracking);
}

/* ===== MD3 App Structure ===== */

/* Main container with responsive 12-col grid */
.md3-app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: var(--md-sys-color-background);
}

/* Grid layout system - 12 columns on desktop, 4 on mobile */
.md3-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--md-sys-spacing-2);
    padding: var(--md-sys-spacing-2);
    max-width: 1440px;
    margin: 0 auto;
    width: 100%;
}

/* Tablet and up - 8 columns */
@media (min-width: 600px) {
    .md3-grid {
        grid-template-columns: repeat(8, 1fr);
        gap: var(--md-sys-spacing-3);
        padding: var(--md-sys-spacing-3);
    }
}

/* Desktop - 12 columns */
@media (min-width: 1024px) {
    .md3-grid {
        grid-template-columns: repeat(12, 1fr);
        gap: var(--md-sys-spacing-4);
        padding: var(--md-sys-spacing-4);
    }
}

/* Grid column spanning utilities */
.md3-col-span-1 { grid-column: span 1; }
.md3-col-span-2 { grid-column: span 2; }
.md3-col-span-3 { grid-column: span 3; }
.md3-col-span-4 { grid-column: span 4; }
.md3-col-span-full { grid-column: 1 / -1; }

@media (min-width: 600px) {
    .md3-col-span-5 { grid-column: span 5; }
    .md3-col-span-6 { grid-column: span 6; }
    .md3-col-span-7 { grid-column: span 7; }
    .md3-col-span-8 { grid-column: span 8; }
}

@media (min-width: 1024px) {
    .md3-col-span-9 { grid-column: span 9; }
    .md3-col-span-10 { grid-column: span 10; }
    .md3-col-span-11 { grid-column: span 11; }
    .md3-col-span-12 { grid-column: span 12; }
}

/* ===== MD3 Top App Bar ===== */
.md3-top-app-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    padding: 0 var(--md-sys-spacing-2);
    background-color: var(--md-sys-color-surface);
    color: var(--md-sys-color-on-surface);
    box-shadow: var(--md-sys-elevation-level0);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: box-shadow var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.md3-top-app-bar.elevated {
    box-shadow: var(--md-sys-elevation-level2);
}

.md3-top-app-bar-leading {
    display: flex;
    align-items: center;
    gap: var(--md-sys-spacing-2);
}

.md3-top-app-bar-title {
    font-family: var(--md-sys-typescale-title-large-font);
    font-size: var(--md-sys-typescale-title-large-size);
    line-height: var(--md-sys-typescale-title-large-line-height);
    font-weight: var(--md-sys-typescale-title-large-weight);
    color: var(--md-sys-color-on-surface);
}

.md3-top-app-bar-subtitle {
    font-family: var(--md-sys-typescale-body-medium-font);
    font-size: var(--md-sys-typescale-body-medium-size);
    color: var(--md-sys-color-on-surface-variant);
    margin-top: 2px;
}

.md3-top-app-bar-trailing {
    display: flex;
    align-items: center;
    gap: var(--md-sys-spacing-2);
}

/* ===== MD3 Navigation Drawer (Desktop) ===== */
.md3-navigation-drawer {
    width: 280px;
    height: 100vh;
    background-color: var(--md-sys-color-surface-container-low);
    border-right: 1px solid var(--md-sys-color-outline-variant);
    position: fixed;
    left: 0;
    top: 0;
    z-index: 99;
    overflow-y: auto;
    transition: transform var(--md-sys-motion-duration-medium4) var(--md-sys-motion-easing-emphasized);
}

.md3-navigation-drawer.hidden {
    transform: translateX(-100%);
}

@media (min-width: 1024px) {
    .md3-navigation-drawer {
        position: sticky;
        height: auto;
    }
}

.md3-navigation-drawer-header {
    padding: var(--md-sys-spacing-4) var(--md-sys-spacing-3);
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.md3-navigation-drawer-items {
    padding: var(--md-sys-spacing-2) 0;
}

.md3-navigation-item {
    display: flex;
    align-items: center;
    gap: var(--md-sys-spacing-3);
    padding: var(--md-sys-spacing-2) var(--md-sys-spacing-4);
    margin: var(--md-sys-spacing-1) var(--md-sys-spacing-2);
    border-radius: var(--md-sys-shape-corner-extra-large);
    color: var(--md-sys-color-on-surface-variant);
    text-decoration: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: background-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.md3-navigation-item:hover {
    background-color: rgba(var(--md-sys-color-on-surface), var(--md-sys-state-hover-opacity));
}

.md3-navigation-item.active {
    background-color: var(--md-sys-color-secondary-container);
    color: var(--md-sys-color-on-secondary-container);
}

.md3-navigation-item-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.md3-navigation-item-label {
    font-family: var(--md-sys-typescale-label-large-font);
    font-size: var(--md-sys-typescale-label-large-size);
    font-weight: var(--md-sys-typescale-label-large-weight);
}

/* ===== MD3 Bottom Navigation (Mobile) ===== */
.md3-bottom-navigation {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    background-color: var(--md-sys-color-surface-container);
    box-shadow: var(--md-sys-elevation-level2);
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 0 var(--md-sys-spacing-2);
    z-index: 100;
}

/* Hide on desktop */
@media (min-width: 1024px) {
    .md3-bottom-navigation {
        display: none;
    }
}

.md3-bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--md-sys-spacing-1);
    flex: 1;
    max-width: 120px;
    height: 56px;
    border-radius: var(--md-sys-shape-corner-medium);
    color: var(--md-sys-color-on-surface-variant);
    text-decoration: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.md3-bottom-nav-item:hover {
    background-color: rgba(var(--md-sys-color-on-surface), var(--md-sys-state-hover-opacity));
}

.md3-bottom-nav-item.active {
    color: var(--md-sys-color-on-secondary-container);
}

.md3-bottom-nav-item.active .md3-bottom-nav-icon {
    background-color: var(--md-sys-color-secondary-container);
}

.md3-bottom-nav-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    border-radius: var(--md-sys-shape-corner-medium);
    transition: background-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.md3-bottom-nav-label {
    font-family: var(--md-sys-typescale-label-medium-font);
    font-size: var(--md-sys-typescale-label-medium-size);
    font-weight: var(--md-sys-typescale-label-medium-weight);
    letter-spacing: var(--md-sys-typescale-label-medium-tracking);
}

/* ===== MD3 Content Area ===== */
.md3-content-container {
    flex: 1;
    padding-bottom: 100px; /* Space for bottom nav on mobile */
}

@media (min-width: 1024px) {
    .md3-content-container {
        padding-bottom: var(--md-sys-spacing-4);
    }
}

/* ===== MD3 Icon Button ===== */
.md3-icon-button {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--md-sys-color-on-surface-variant);
    border-radius: var(--md-sys-shape-corner-full);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: background-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.md3-icon-button:hover {
    background-color: rgba(var(--md-sys-color-on-surface), var(--md-sys-state-hover-opacity));
}

.md3-icon-button:active {
    background-color: rgba(var(--md-sys-color-on-surface), var(--md-sys-state-pressed-opacity));
}

.md3-icon-button svg,
.md3-icon-button .icon {
    width: 24px;
    height: 24px;
    font-size: 24px;
}

/* ===== Utility Classes ===== */
.md3-hidden {
    display: none !important;
}

.md3-visible {
    display: block !important;
}

/* Spacing utilities */
.md3-m-0 { margin: var(--md-sys-spacing-0); }
.md3-m-1 { margin: var(--md-sys-spacing-1); }
.md3-m-2 { margin: var(--md-sys-spacing-2); }
.md3-m-3 { margin: var(--md-sys-spacing-3); }
.md3-m-4 { margin: var(--md-sys-spacing-4); }
.md3-m-6 { margin: var(--md-sys-spacing-6); }
.md3-m-8 { margin: var(--md-sys-spacing-8); }

.md3-p-0 { padding: var(--md-sys-spacing-0); }
.md3-p-1 { padding: var(--md-sys-spacing-1); }
.md3-p-2 { padding: var(--md-sys-spacing-2); }
.md3-p-3 { padding: var(--md-sys-spacing-3); }
.md3-p-4 { padding: var(--md-sys-spacing-4); }
.md3-p-6 { padding: var(--md-sys-spacing-6); }
.md3-p-8 { padding: var(--md-sys-spacing-8); }

/* Responsive visibility */
.md3-hide-on-mobile {
    display: none;
}

@media (min-width: 600px) {
    .md3-hide-on-mobile {
        display: block;
    }
    .md3-hide-on-tablet {
        display: none;
    }
}

@media (min-width: 1024px) {
    .md3-hide-on-desktop {
        display: none;
    }
    .md3-hide-on-tablet {
        display: block;
    }
}