/* Material Design 3 CSS */

/* Google Fonts (Product Sans / Google Sans) */
@font-face {
  font-family: 'Product Sans';
  src: url('../fonts/ProductSans-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
}

@font-face {
  font-family: 'Product Sans';
  src: url('../fonts/ProductSans-Medium.ttf') format('truetype');
  font-weight: 500;
  font-style: normal;
}

@font-face {
  font-family: 'Product Sans';
  src: url('../fonts/ProductSans-Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
}

@font-face {
  font-family: 'Product Sans';
  src: url('../fonts/ProductSans-Light.ttf') format('truetype');
  font-weight: 300;
  font-style: normal;
}

/* CSS Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Material Design 3 Variables - Purple Theme */
:root {
    /* Light Theme (Default) */
    /* Primary - Purple */
    --md-primary: #6750A4;
    --md-primary-container: #EADDFF;
    --md-on-primary: #FFFFFF;
    --md-on-primary-container: #21005E;
    
    /* Secondary */
    --md-secondary: #625B71;
    --md-secondary-container: #E8DEF8;
    --md-on-secondary: #FFFFFF;
    --md-on-secondary-container: #1E192B;
    
    /* Tertiary */
    --md-tertiary: #7D5260;
    --md-tertiary-container: #FFD8E4;
    --md-on-tertiary: #FFFFFF;
    --md-on-tertiary-container: #370B1E;
    
    /* Error */
    --md-error: #B3261E;
    --md-error-container: #F9DEDC;
    --md-on-error: #FFFFFF;
    --md-on-error-container: #410E0B;
    
    /* Background */
    --md-background: #FFFBFE;
    --md-on-background: #1C1B1F;
    
    /* Surface */
    --md-surface: #FFFBFE;
    --md-on-surface: #1C1B1F;
    --md-surface-variant: #E7E0EC;
    --md-on-surface-variant: #49454F;
    
    /* Outline */
    --md-outline: #79747E;
    --md-outline-variant: #CAC4D0;
    
    /* Shadow */
    --md-shadow: rgba(0, 0, 0, 0.08);
    
    /* Elevation Levels */
    --md-elevation-1: 0 1px 3px 1px var(--md-shadow);
    --md-elevation-2: 0 2px 6px 2px var(--md-shadow);
    --md-elevation-3: 0 4px 8px 3px var(--md-shadow);
    --md-elevation-4: 0 6px 10px 4px var(--md-shadow);
    --md-elevation-5: 0 8px 12px 6px var(--md-shadow);
    
    /* Material Design 3 Specific State Layers */
    --md-state-hover-opacity: 0.08;
    --md-state-focus-opacity: 0.12;
    --md-state-pressed-opacity: 0.12;
    --md-state-dragged-opacity: 0.16;
    
    /* Additional Settings */
    --md-font-family: 'Product Sans', sans-serif;
    --md-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --md-border-radius: 16px;
    --md-border-radius-small: 8px;
    --md-border-radius-large: 28px;
    --md-border-radius-full: 999px;
}

/* Dark Theme */
[data-theme="dark"] {
    /* Primary - Purple */
    --md-primary: #D0BCFF;
    --md-primary-container: #4F378B;
    --md-on-primary: #371E73;
    --md-on-primary-container: #EADDFF;
    
    /* Secondary */
    --md-secondary: #CCC2DC;
    --md-secondary-container: #4A4458;
    --md-on-secondary: #332D41;
    --md-on-secondary-container: #E8DEF8;
    
    /* Tertiary */
    --md-tertiary: #EFB8C8;
    --md-tertiary-container: #633B48;
    --md-on-tertiary: #492532;
    --md-on-tertiary-container: #FFD8E4;
    
    /* Error */
    --md-error: #F2B8B5;
    --md-error-container: #8C1D18;
    --md-on-error: #601410;
    --md-on-error-container: #F9DEDC;
    
    /* Background */
    --md-background: #1C1B1F;
    --md-on-background: #E6E1E5;
    
    /* Surface */
    --md-surface: #1C1B1F;
    --md-on-surface: #E6E1E5;
    --md-surface-variant: #49454F;
    --md-on-surface-variant: #CAC4D0;
    
    /* Surface Tint Color (for elevation) */
    --md-surface-tint: #D0BCFF;
    
    /* Outline */
    --md-outline: #938F99;
    --md-outline-variant: #49454F;
    
    /* Shadow */
    --md-shadow: rgba(0, 0, 0, 0.3);
}

/* Base Styles */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--md-font-family);
    line-height: 1.5;
    color: var(--md-on-background);
    background-color: var(--md-background);
    transition: var(--md-transition);
}

a {
    text-decoration: none;
    color: var(--md-primary);
    transition: var(--md-transition);
}

a:hover {
    color: var(--md-on-primary-container);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul {
    list-style: none;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}

.section {
    padding: 80px 0;
}

.section-title {
    font-family: var(--md-font-family);
    text-align: center;
    margin-bottom: 48px;
    font-size: 2.5rem;
    font-weight: 400;
    color: var(--md-on-surface);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: var(--md-primary);
    border-radius: 2px;
}

/* Material Design 3 Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    border-radius: var(--md-border-radius-full);
    font-family: var(--md-font-family);
    font-weight: 500;
    font-size: 14px;
    text-transform: none; /* Changed from uppercase to none */
    letter-spacing: 0.1px;
    cursor: pointer;
    transition: var(--md-transition);
    border: none;
    min-height: 40px;
    position: relative;
    overflow: hidden;
}

.btn:after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: transparent;
    border-radius: var(--md-border-radius-full);
    transition: var(--md-transition);
}

.btn:hover:after {
    background-color: rgba(0, 0, 0, 0.05);
}

.btn:active:after {
    background-color: rgba(0, 0, 0, 0.1);
}

/* MD3 Filled Button */
.primary-btn, .md-filled-button {
    background-color: var(--md-primary);
    color: var(--md-on-primary);
    box-shadow: var(--md-elevation-1);
    transition: background-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

.primary-btn:hover, .md-filled-button:hover {
    background-color: #7B61B1; /* Lighter shade of primary */
    box-shadow: var(--md-elevation-2);
    /* transform: translateY(-1px); */ /* Removed shifting animation */
    color: var(--md-on-primary);
}

.primary-btn:active, .md-filled-button:active {
    box-shadow: var(--md-elevation-1);
    transform: translateY(0);
}

/* MD3 Outlined Button */
.secondary-btn, .md-outlined-button {
    background-color: transparent;
    color: var(--md-primary);
    border: 1px solid var(--md-outline);
}

.secondary-btn:hover, .md-outlined-button:hover {
    background-color: rgba(103, 80, 164, 0.08); /* Using hardcoded color for simplicity */
    border-color: var(--md-primary);
}

.secondary-btn:active, .md-outlined-button:active {
    background-color: rgba(103, 80, 164, 0.12);
}

/* MD3 Text Button */
.md-text-button {
    background-color: transparent;
    color: var(--md-primary);
    padding: 10px 12px;
    border: none;
}

.md-text-button:hover {
    background-color: rgba(103, 80, 164, 0.08);
}

.md-text-button:active {
    background-color: rgba(103, 80, 164, 0.12);
}

/* MD3 Icon Button */
.md-icon-button {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: transparent;
    color: var(--md-on-surface-variant);
    transition: var(--md-transition);
    border: none;
    cursor: pointer;
}

.md-icon-button:hover {
    background-color: rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .md-icon-button:hover {
    background-color: rgba(255, 255, 255, 0.08);
}

.small-btn {
    padding: 6px 16px;
    font-size: 0.85rem;
    min-height: 32px;
}

.primary-btn:hover {
    box-shadow: var(--md-elevation-2);
    color: var(--md-on-primary);
}

.primary-btn:active {
    box-shadow: var(--md-elevation-1);
}

.secondary-btn {
    background-color: transparent;
    color: var(--md-primary);
    border: 1px solid var(--md-outline);
}

.secondary-btn:hover {
    background-color: var(--md-primary-container);
    color: var(--md-on-primary-container);
}

.small-btn {
    padding: 6px 16px;
    font-size: 0.85rem;
    min-height: 32px;
}

/* Material Design 3 Cards */
.md-card {
    background-color: var(--md-surface);
    border-radius: var(--md-border-radius);
    box-shadow: var(--md-elevation-1);
    overflow: hidden;
    transition: var(--md-transition);
    position: relative;
}

.md-card:hover {
    box-shadow: var(--md-elevation-2);
    transform: translateY(-4px);
}

/* Card variants with different elevation levels */
.md-card-elevated {
    box-shadow: var(--md-elevation-3);
}

.md-card-filled {
    background-color: var(--md-surface-variant);
}

.md-card-outlined {
    background-color: var(--md-surface);
    border: 1px solid var(--md-outline-variant);
    box-shadow: none;
}

/* Card with image at top */
.md-card-media-top {
    display: flex;
    flex-direction: column;
}

.md-card-media-top .md-card-media {
    height: 200px;
    overflow: hidden;
}

.md-card-media-top .md-card-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--md-transition);
}

.md-card-media-top:hover .md-card-media img {
    transform: scale(1.05);
}

.md-card-content {
    padding: 16px;
}

.md-card-title {
    font-family: var(--md-font-family);
    color: var(--md-on-surface);
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 8px;
}

.md-card-subtitle {
    color: var(--md-on-surface-variant);
    font-size: 0.875rem;
    margin-bottom: 16px;
}

.md-card-text {
    color: var(--md-on-surface);
    font-size: 0.875rem;
    line-height: 1.5;
    margin-bottom: 16px;
}

.md-card-actions {
    display: flex;
    padding: 8px 16px 16px;
    justify-content: flex-end;
}

/* Header & Navigation - Material Design 3 */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--md-surface);
    z-index: 1000;
    transition: var(--md-transition);
    box-shadow: var(--md-elevation-1);
    height: 64px;
    display: flex;
    align-items: center;
}

[data-theme="dark"] header {
    /* MD3 Surface 2 elevation tint in dark mode */
    background-color: color-mix(in srgb, var(--md-surface) 94%, var(--md-surface-tint) 6%);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0;
    height: 100%;
    width: 100%;
}

.logo a {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--md-primary);
    display: flex;
    align-items: center;
    text-decoration: none;
    padding: 8px 0;
}

.nav-links {
    display: flex;
    height: 100%;
}

.nav-links li {
    margin-left: 8px;
    height: 100%;
    display: flex;
    align-items: center;
}

.nav-links a {
    color: var(--md-on-surface);
    font-weight: 500;
    position: relative;
    padding: 0 16px;
    height: 36px;
    display: flex;
    align-items: center;
    border-radius: 36px;
    transition: var(--md-transition);
    text-decoration: none;
}

.nav-links a:hover {
    color: var(--md-primary);
    background-color: rgba(103, 80, 164, 0.08);
}

.nav-links a:active {
    background-color: rgba(103, 80, 164, 0.12);
}

.nav-links a.active {
    color: var(--md-on-primary-container);
    background-color: var(--md-primary-container);
}

.hamburger {
    display: none;
    cursor: pointer;
    background: none;
    border: none;
    padding: 8px;
    border-radius: var(--md-border-radius-small);
    margin-left: 8px;
}

.hamburger:hover {
    background-color: var(--md-surface-variant);
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--md-on-surface);
    margin: 4px 0;
    transition: var(--md-transition);
}

/* Hero Section - Material Design 3 */
.hero {
    position: relative;
    display: flex;
    align-items: center;
    min-height: 100vh;
    padding-top: 64px; /* Match header height */
    background-color: rgb(5, 70, 121);
    background-image: url('../assets/images/profile.jpg');
    background-size: auto 100%;
    background-position: right center;
    background-repeat: no-repeat;
    transition: var(--md-transition);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
                rgba(255,251,254,1) 0%, 
                rgba(255,251,254,0.8) 30%, 
                rgba(255,251,254,0.3) 45%, 
                rgba(255,251,254,0) 55%, 
                rgba(255,251,254,0) 100%);
    backdrop-filter: blur(10px) saturate(1.2);
    -webkit-backdrop-filter: blur(10px) saturate(1.2);
    mask: linear-gradient(90deg, 
          white 0%, 
          white 30%, 
          white 45%, 
          transparent 55%, 
          transparent 100%);
    -webkit-mask: linear-gradient(90deg, 
                  white 0%, 
                  white 30%, 
                  white 45%, 
                  transparent 55%, 
                  transparent 100%);
    z-index: 1;
    transition: var(--md-transition);
}

[data-theme="dark"] .hero::before {
    background: linear-gradient(90deg, 
                rgba(28,27,31,1) 0%, 
                rgba(28,27,31,0.8) 30%, 
                rgba(28,27,31,0.3) 45%, 
                rgba(28,27,31,0) 55%, 
                rgba(28,27,31,0) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 600px;
    margin-left: 0;
    text-align: left;
    animation: fadeIn 0.8s ease-out forwards;
}

.hero-text {
    padding-right: 20px;
}

.hero-content h1 {
    font-family: var(--md-font-family);
    font-size: 3.5rem;
    font-weight: 400;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--md-on-surface);
}

.hero-content p {
    font-size: 1.2rem;
    line-height: 1.5;
    margin-bottom: 20px;
    color: var(--md-on-surface-variant);
}

.hero-contact-info {
    background-color: var(--md-surface);
    padding: 16px 24px;
    border-radius: var(--md-border-radius);
    margin-bottom: 32px;
    border-left: 4px solid var(--md-primary);
    box-shadow: var(--md-elevation-1);
    transition: var(--md-transition);
}

[data-theme="dark"] .hero-contact-info {
    /* MD3 Surface 1 elevation tint in dark mode */
    background-color: color-mix(in srgb, var(--md-surface) 95%, var(--md-surface-tint) 5%);
}

.hero-contact-info p {
    margin-bottom: 12px;
    font-size: 1rem;
    color: var(--md-on-surface);
}

.hero-contact-info .social-links {
    margin-top: 16px;
}

.highlight {
    color: var(--md-primary);
    white-space: nowrap;
}

.cta-buttons {
    display: flex;
    justify-content: flex-start;
    gap: 16px;
}

/* About Section */
.about-content {
    display: flex;
    align-items: center;
    gap: 48px;
}

.about-image {
    flex: 1;
}

.about-image img {
    border-radius: var(--md-border-radius);
    box-shadow: var(--md-elevation-2);
}

.about-text {
    flex: 1;
}

.about-text p {
    margin-bottom: 20px;
    color: var(--md-on-surface);
}

.social-links {
    display: flex;
    gap: 16px;
    margin-top: 24px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--md-border-radius-full);
    background-color: var(--md-surface-variant);
    transition: var(--md-transition);
}

.social-links a:hover {
    background-color: var(--md-primary-container);
    transform: translateY(-4px);
}

.social-links a img {
    width: 24px;
    height: 24px;
    transition: var(--md-transition);
}

/* Projects Section - Material Design 3 */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.project-card {
    background-color: var(--md-surface);
    border-radius: var(--md-border-radius);
    overflow: hidden;
    box-shadow: var(--md-elevation-1);
    transition: var(--md-transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

[data-theme="dark"] .project-card {
    /* MD3 Surface 1 elevation tint in dark mode */
    background-color: color-mix(in srgb, var(--md-surface) 95%, var(--md-surface-tint) 5%);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--md-elevation-3);
}

.project-image {
    height: 200px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--md-transition);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-info {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-info h3 {
    font-family: var(--md-font-family);
    margin-bottom: 12px;
    font-weight: 500;
    color: var(--md-on-surface);
    font-size: 1.25rem;
    line-height: 1.3;
}

.project-info p {
    margin-bottom: 16px;
    color: var(--md-on-surface-variant);
    flex-grow: 1;
}

.project-links {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: auto;
}

.project-links .btn {
    background-color: var(--md-surface-variant);
    color: var(--md-on-surface-variant);
    border: none;
    font-weight: 500;
    border-radius: 20px;
    padding: 8px 16px;
    font-size: 14px;
    letter-spacing: 0.1px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-transform: none;
}

.project-links .btn:hover {
    background-color: var(--md-primary-container);
    color: var(--md-on-primary-container);
    transform: translateY(-2px);
    box-shadow: var(--md-elevation-1);
}

.project-links .btn:active {
    background-color: var(--md-primary);
    color: var(--md-on-primary);
}

/* Skills Section - Material Design 3 */
.skills-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.skill-category {
    background-color: var(--md-surface);
    padding: 24px;
    border-radius: var(--md-border-radius);
    box-shadow: var(--md-elevation-1);
    transition: var(--md-transition);
    height: 100%;
}

[data-theme="dark"] .skill-category {
    /* MD3 Surface 1 elevation tint in dark mode */
    background-color: color-mix(in srgb, var(--md-surface) 95%, var(--md-surface-tint) 5%);
}

.skill-category:hover {
    box-shadow: var(--md-elevation-2);
    transform: translateY(-4px);
}

.skill-category h3 {
    font-family: var(--md-font-family);
    margin-bottom: 16px;
    color: var(--md-primary);
    position: relative;
    padding-bottom: 12px;
    font-weight: 500;
    font-size: 1.25rem;
}

.skill-category h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 48px;
    height: 3px;
    background-color: var(--md-primary);
    border-radius: 1.5px;
}

.skill-list li {
    padding: 10px 0;
    border-bottom: 1px solid var(--md-outline-variant);
    color: var(--md-on-surface);
    position: relative;
    display: flex;
    align-items: center;
}

.skill-list li:last-child {
    border-bottom: none;
}

.skill-list li::before {
    content: '•';
    color: var(--md-primary);
    font-size: 1.2rem;
    margin-right: 10px;
}

/* Publications Section - Material Design 3 */
.publications-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.publication-item {
    background-color: var(--md-surface);
    padding: 24px;
    border-radius: var(--md-border-radius);
    box-shadow: var(--md-elevation-1);
    transition: var(--md-transition);
    border-left: 4px solid var(--md-primary);
}

[data-theme="dark"] .publication-item {
    /* MD3 Surface 1 elevation tint in dark mode */
    background-color: color-mix(in srgb, var(--md-surface) 95%, var(--md-surface-tint) 5%);
}

.publication-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--md-elevation-2);
}

.publication-title {
    font-family: var(--md-font-family);
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--md-on-surface);
    font-weight: 500;
    line-height: 1.3;
}

.publication-meta {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    font-size: 0.9rem;
    align-items: center;
}

.publication-venue {
    font-weight: 500;
    color: var(--md-on-primary-container);
    background-color: var(--md-primary-container);
    padding: 4px 12px;
    border-radius: var(--md-border-radius-full);
}

.publication-year {
    color: var(--md-on-surface-variant);
    font-weight: 500;
    display: flex;
    align-items: center;
}

.publication-abstract {
    color: var(--md-on-surface-variant);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* Footer - Material Design 3 */
footer {
    background-color: var(--md-surface-variant);
    color: var(--md-on-surface-variant);
    padding: 32px 0;
    text-align: center;
    margin-top: 40px;
}

[data-theme="dark"] footer {
    /* Slightly different color to match dark theme */
    background-color: color-mix(in srgb, var(--md-surface-variant) 90%, var(--md-surface) 10%);
}

/* Dark Mode Toggle - Material Design 3 */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--md-surface-variant);
    border: none;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.2s;
    margin-left: 16px;
    overflow: hidden;
    position: relative;
}

.theme-toggle:hover {
    background-color: var(--md-primary-container);
    transform: translateY(-2px);
}

.theme-toggle:active {
    transform: translateY(0);
}

.theme-toggle img {
    width: 24px;
    height: 24px;
    transition: transform 0.3s ease;
}

.theme-toggle:hover img {
    transform: rotate(30deg);
}

[data-theme="dark"] .theme-toggle img {
    color: var(--md-on-primary);
    stroke: var(--md-on-primary);
}

/* Material Design 3 Specific Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.6s ease-out forwards;
}

/* MD3 Ripple Effect */
.md-ripple {
    position: relative;
    overflow: hidden;
}

.md-ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(0, 0, 0, 0.1);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%);
    transform-origin: 50% 50%;
}

[data-theme="dark"] .md-ripple::after {
    background: rgba(255, 255, 255, 0.15);
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }
    100% {
        transform: scale(100, 100);
        opacity: 0;
    }
}

.md-ripple:active::after {
    opacity: 0.3;
    transform: scale(0, 0);
    animation: ripple 0.6s ease-out;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mt-5 { margin-top: 40px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.mb-5 { margin-bottom: 40px; }

/* Material Elevation (Shadows) */
.elevation-1 { box-shadow: var(--md-elevation-1); }
.elevation-2 { box-shadow: var(--md-elevation-2); }
.elevation-3 { box-shadow: var(--md-elevation-3); }
.elevation-4 { box-shadow: var(--md-elevation-4); }
.elevation-5 { box-shadow: var(--md-elevation-5); }