:root {
    /* Futuristic White Theme Palette */
    --md-sys-color-primary: #00bcd4;
    /* Cyan/Electric Blue */
    --md-sys-color-on-primary: #ffffff;
    --md-sys-color-primary-container: #e0f7fa;
    --md-sys-color-on-primary-container: #006064;

    --md-sys-color-secondary: #546e7a;
    /* Blue Grey */
    --md-sys-color-on-secondary: #ffffff;
    --md-sys-color-secondary-container: #eceff1;
    --md-sys-color-on-secondary-container: #263238;

    --md-sys-color-tertiary: #00e5ff;
    /* Bright Cyan Accent */
    --md-sys-color-on-tertiary: #000000;
    --md-sys-color-tertiary-container: #84ffff;
    --md-sys-color-on-tertiary-container: #004d40;

    --md-sys-color-error: #ba1a1a;
    --md-sys-color-on-error: #ffffff;
    --md-sys-color-error-container: #ffdad6;
    --md-sys-color-on-error-container: #410002;

    --md-sys-color-background: #f8f9fa;
    /* Very Light Gray/White */
    --md-sys-color-on-background: #191c1d;

    --md-sys-color-surface: #ffffff;
    --md-sys-color-on-surface: #191c1d;

    --md-sys-color-surface-variant: #e0e6eb;
    /* Light Blue-ish Gray */
    --md-sys-color-on-surface-variant: #40484c;

    --md-sys-color-outline: #70777c;
    --md-sys-color-outline-variant: #c0c8cd;

    /* Elevations - Soft & Clean */
    --md-sys-elevation-level1: 0 2px 4px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.1);
    --md-sys-elevation-level2: 0 4px 8px rgba(0, 0, 0, 0.05), 0 2px 4px rgba(0, 0, 0, 0.1);
    --md-sys-elevation-level3: 0 8px 16px rgba(0, 0, 0, 0.05), 0 4px 8px rgba(0, 0, 0, 0.1);

    /* Shape - Modern Rounded */
    --md-sys-shape-corner-extra-small: 4px;
    --md-sys-shape-corner-small: 8px;
    --md-sys-shape-corner-medium: 16px;
    --md-sys-shape-corner-large: 24px;
    --md-sys-shape-corner-extra-large: 32px;
    --md-sys-shape-corner-full: 9999px;

    /* Spacing */
    --spacing-1: 8px;
    --spacing-2: 16px;
    --spacing-3: 24px;
    --spacing-4: 32px;
    --spacing-5: 48px;

    /* Typography (Roboto) */
    --md-sys-typescale-display-large-font: 'Roboto', sans-serif;
    --md-sys-typescale-display-large-line-height: 64px;
    --md-sys-typescale-display-large-size: 57px;
    --md-sys-typescale-display-large-tracking: -0.25px;
    --md-sys-typescale-display-large-weight: 300;
    /* Lighter weight for modern feel */

    --md-sys-typescale-display-medium-font: 'Roboto', sans-serif;
    --md-sys-typescale-display-medium-line-height: 52px;
    --md-sys-typescale-display-medium-size: 45px;
    --md-sys-typescale-display-medium-tracking: 0px;
    --md-sys-typescale-display-medium-weight: 300;

    --md-sys-typescale-headline-small-font: 'Roboto', sans-serif;
    --md-sys-typescale-headline-small-line-height: 32px;
    --md-sys-typescale-headline-small-size: 24px;
    --md-sys-typescale-headline-small-tracking: 0px;
    --md-sys-typescale-headline-small-weight: 400;

    --md-sys-typescale-body-large-font: 'Roboto', sans-serif;
    --md-sys-typescale-body-large-line-height: 24px;
    --md-sys-typescale-body-large-size: 16px;
    --md-sys-typescale-body-large-tracking: 0.5px;
    --md-sys-typescale-body-large-weight: 400;

    --md-sys-typescale-label-large-font: 'Roboto', sans-serif;
    --md-sys-typescale-label-large-line-height: 20px;
    --md-sys-typescale-label-large-size: 14px;
    --md-sys-typescale-label-large-tracking: 0.1px;
    --md-sys-typescale-label-large-weight: 500;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--md-sys-color-background);
    color: var(--md-sys-color-on-background);
    min-height: 100vh;
    display: flex;
    flex-direction: row;
    /* Subtle mesh gradient background for futuristic feel */
    background-image: radial-gradient(circle at 10% 20%, rgba(0, 188, 212, 0.05) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(84, 110, 122, 0.05) 0%, transparent 20%);
}

/* Typography Classes */
.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);
}

.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);
    margin-bottom: var(--spacing-3);
    color: var(--md-sys-color-primary);
}

.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);
}

.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);
    margin-bottom: var(--spacing-2);
}

.body-medium {
    font-size: 14px;
    line-height: 20px;
    letter-spacing: 0.25px;
    margin-bottom: var(--spacing-1);
}

.label-small {
    font-size: 11px;
    line-height: 16px;
    letter-spacing: 0.5px;
    font-weight: 500;
}

/* Nav Rail / Drawer */
.md-nav {
    width: 80px;
    height: 100vh;
    background-color: rgba(255, 255, 255, 0.8);
    /* Glassmorphism base */
    backdrop-filter: blur(12px);
    /* Glass blur */
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-3) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    border-right: 1px solid rgba(0, 0, 0, 0.05);
}

.nav-brand {
    font-weight: 700;
    font-size: 24px;
    color: var(--md-sys-color-primary);
    margin-bottom: var(--spacing-4);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--md-sys-shape-corner-full);
    background-color: var(--md-sys-color-surface);
}

.nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
    width: 100%;
    align-items: center;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: var(--md-sys-shape-corner-medium);
    /* Active indicator shape */
    color: var(--md-sys-color-on-surface-variant);
    text-decoration: none;
    position: relative;
    overflow: hidden;
    transition: background-color 0.2s, color 0.2s;
}

.nav-item i {
    font-size: 24px;
    margin-bottom: 4px;
}

.nav-item .label {
    font-size: 12px;
    font-weight: 500;
}

.nav-item:hover {
    background-color: rgba(208, 188, 255, 0.08);
    /* Primary color low opacity */
    color: var(--md-sys-color-on-surface);
}

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

/* Main Content */
.content-wrapper {
    flex: 1;
    padding: var(--spacing-4);
    height: 100vh;
    overflow-y: auto;
    scroll-padding-top: var(--spacing-4);
    position: relative;
}

/* Sections */
.section-container {
    max-width: 1200px;
    margin: 0 auto var(--spacing-5) auto;
    /* Bottom margin for spacing */
    padding-top: var(--spacing-4);
    /* Offset for scroll target */
}

/* Hero Section */
.hero-section {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-content {
    max-width: 800px;
}

.profile-pic-container {
    margin-bottom: var(--spacing-3);
}

.profile-placeholder {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    background-color: var(--md-sys-color-surface-variant);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    border: 4px solid var(--md-sys-color-primary);
}

.hero-actions {
    margin-top: var(--spacing-4);
    display: flex;
    gap: var(--spacing-2);
    justify-content: center;
}

/* Buttons */
.md-button {
    height: 40px;
    padding: 0 24px;
    border-radius: var(--md-sys-shape-corner-full);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    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);
    letter-spacing: var(--md-sys-typescale-label-large-tracking);
    text-decoration: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    border: none;
    transition: box-shadow 0.2s;
    user-select: none;
}

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

.md-filled-button:hover {
    box-shadow: var(--md-sys-elevation-level1);
}

.md-outlined-button {
    background-color: transparent;
    border: 1px solid var(--md-sys-color-outline);
    color: var(--md-sys-color-primary);
}

.md-text-button {
    background: transparent;
    color: var(--md-sys-color-primary);
    padding: 0 12px;
}

.md-tonal-button {
    background-color: var(--md-sys-color-secondary-container);
    color: var(--md-sys-color-on-secondary-container);
}

/* Icon inside button */
.md-button i.icon-left {
    margin-right: 8px;
    font-size: 18px;
}

/* State Layer (Ripple container) */
.state-layer {
    position: absolute;
    inset: 0;
    background-color: currentColor;
    opacity: 0;
    transition: opacity 0.2s;
}

.md-button:hover .state-layer {
    opacity: 0.08;
}

.md-button:active .state-layer {
    opacity: 0.12;
}

/* Cards */
.card {
    border-radius: var(--md-sys-shape-corner-medium);
    padding: var(--spacing-3);
    position: relative;
    overflow: hidden;
}

.md-elevated-card {
    background-color: var(--md-sys-color-surface);
    box-shadow: var(--md-sys-elevation-level1);
    color: var(--md-sys-color-on-surface);
    /* Subtle border for light theme to pop against white background */
    border: 1px solid rgba(0, 0, 0, 0.03);
}

.md-outlined-card {
    background-color: var(--md-sys-color-surface);
    border: 1px solid var(--md-sys-color-outline-variant);
    color: var(--md-sys-color-on-surface);
}

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

.card-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: var(--spacing-2);
}

/* Grid Layout */
.grid-layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-3);
}

/* Service Card Specifics */
.service-icon {
    font-size: 40px;
    color: var(--md-sys-color-primary);
    margin-bottom: var(--spacing-2);
}

/* Timeline (Resume) */
.timeline {
    position: relative;
    padding-left: 20px;
    border-left: 2px solid var(--md-sys-color-outline-variant);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-3);
    padding-left: var(--spacing-3);
}

.timeline-marker {
    position: absolute;
    left: -27px;
    /* Adjust to center on line */
    top: 0;
    width: 12px;
    height: 12px;
    background-color: var(--md-sys-color-primary);
    border-radius: 50%;
    border: 4px solid var(--md-sys-color-background);
    /* Creates a gap effect */
}

.timeline-content .date {
    display: block;
    margin-bottom: 4px;
    color: var(--md-sys-color-primary);
}

.resume-actions {
    margin-top: var(--spacing-3);
    display: flex;
    justify-content: flex-start;
}

/* Contact Links */
.contact-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
    margin-top: var(--spacing-2);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--md-sys-color-primary);
    text-decoration: none;
    font-size: 16px;
}

.contact-item:hover {
    text-decoration: underline;
}

/* Footer */
.md-footer {
    border-top: 1px solid var(--md-sys-color-outline-variant);
    padding: var(--spacing-3) 0;
    text-align: center;
    color: var(--md-sys-color-on-surface-variant);
    margin-top: var(--spacing-5);
}

/* Responsive Styles */
@media (max-width: 768px) {
    body {
        flex-direction: column;
    }

    .md-nav {
        width: 100%;
        height: auto;
        flex-direction: row;
        justify-content: space-between;
        padding: 0 var(--spacing-2);
        border-right: none;
        border-bottom: 1px solid var(--md-sys-color-outline-variant);
        position: fixed;
        /* Bottom nav for mobile typically, but top is simpler for now */
        bottom: 0;
        top: auto;
        background-color: var(--md-sys-color-surface-variant);
    }

    .nav-brand {
        display: none;
        /* Hide brand specific logos on bottom bar usually to save space */
    }

    .nav-links {
        flex-direction: row;
        justify-content: space-around;
    }

    .nav-item {
        width: auto;
        flex: 1;
        padding: 8px 0;
        height: auto;
    }

    .nav-item .label {
        font-size: 10px;
    }

    .nav-item i {
        font-size: 20px;
    }

    .content-wrapper {
        padding-bottom: 80px;
        /* Space for bottom nav */
        height: 100%;
        /* Allow full scroll */
        position: relative;
        overflow-y: visible;
        /* Let body handle scroll */
    }

    .hero-section {
        min-height: 60vh;
        margin-top: 0;
    }

    .display-large {
        font-size: 40px;
        line-height: 48px;
    }
}