/* Material Design 3 Token Implementation */
:root {
    /* Color Palette - Seed: Green/Teal */
    --md-sys-color-primary: #006c4c;
    --md-sys-color-on-primary: #ffffff;
    --md-sys-color-primary-container: #89f8c7;
    --md-sys-color-on-primary-container: #002114;
    
    --md-sys-color-secondary: #4d6357;
    --md-sys-color-on-secondary: #ffffff;
    --md-sys-color-secondary-container: #d0e8d8;
    --md-sys-color-on-secondary-container: #0a1f16;
    
    --md-sys-color-tertiary: #3d648f;
    --md-sys-color-on-tertiary: #ffffff;
    --md-sys-color-tertiary-container: #d3e3ff;
    --md-sys-color-on-tertiary-container: #001c3a;

    --md-sys-color-background: #fbfdf9;
    --md-sys-color-on-background: #191c1a;
    
    --md-sys-color-surface: #fbfdf9;
    --md-sys-color-on-surface: #191c1a;
    
    --md-sys-color-surface-variant: #dbe5de;
    --md-sys-color-on-surface-variant: #404943;
    
    --md-sys-color-outline: #707973;

    /* Scrolled Surface Color (Light Mode Default) */
    /* Set to same as surface color to prevent dimming/tinting in light mode */
    --md-sys-color-surface-scrolled: #fbfdf9; 
    
    /* Elevation */
    --md-sys-elevation-1: 0px 1px 3px 1px rgba(0, 0, 0, 0.15), 0px 1px 2px 0px rgba(0, 0, 0, 0.3);
    --md-sys-elevation-2: 0px 2px 6px 2px rgba(0, 0, 0, 0.15), 0px 1px 2px 0px rgba(0, 0, 0, 0.3);
    --md-sys-elevation-3: 0px 4px 8px 3px rgba(0, 0, 0, 0.15), 0px 1px 3px 0px rgba(0, 0, 0, 0.3);

    /* Shape */
    --md-sys-shape-corner-small: 8px;
    --md-sys-shape-corner-medium: 12px;
    --md-sys-shape-corner-large: 16px;
    --md-sys-shape-corner-full: 9999px;

    /* Typography */
    --md-sys-typescale-display-large-font: 'Roboto', sans-serif;
    --md-sys-typescale-display-large-size: 57px;
    --md-sys-typescale-display-large-weight: 400;

    --md-sys-typescale-headline-medium-font: 'Roboto', sans-serif;
    --md-sys-typescale-headline-medium-size: 28px;
    --md-sys-typescale-headline-medium-weight: 400;

    --md-sys-typescale-body-large-font: 'Roboto', sans-serif;
    --md-sys-typescale-body-large-size: 16px;
    --md-sys-typescale-body-large-weight: 400;
}

/* Dark Mode Overrides */
[data-theme="dark"] {
    --md-sys-color-primary: #6cdbac;
    --md-sys-color-on-primary: #003825;
    --md-sys-color-primary-container: #005138;
    --md-sys-color-on-primary-container: #89f8c7;
    
    --md-sys-color-secondary: #b4ccbd;
    --md-sys-color-on-secondary: #1f352a;
    --md-sys-color-secondary-container: #354b3f;
    --md-sys-color-on-secondary-container: #d0e8d8;

    --md-sys-color-background: #191c1a;
    --md-sys-color-on-background: #e1e3df;
    
    --md-sys-color-surface: #191c1a;
    --md-sys-color-on-surface: #e1e3df;
    
    --md-sys-color-surface-variant: #404943;
    --md-sys-color-on-surface-variant: #c0c9c2;
    
    --md-sys-color-outline: #8a938c;

    /* Scrolled Surface Color (Dark Mode) */
    --md-sys-color-surface-scrolled: #202522; /* Dark elevation tint */
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--md-sys-color-background);
    color: var(--md-sys-color-on-background);
    padding-bottom: 80px; /* Space for Bottom Nav */
    padding-top: 64px; /* Space for Top App Bar */
    transition: background-color 0.3s, color 0.3s;
}

/* Desktop Layout Tweaks */
@media (min-width: 840px) {
    body {
        padding-bottom: 0;
    }
}

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

/* Top App Bar */
.top-app-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background-color: var(--md-sys-color-surface);
    color: var(--md-sys-color-on-surface);
    display: flex;
    align-items: center;
    z-index: 1000;
    transition: background-color 0.2s, box-shadow 0.2s;
}

.top-app-bar.scrolled {
    background-color: var(--md-sys-color-surface-scrolled); /* Uses dynamic variable */
    box-shadow: var(--md-sys-elevation-2);
}

.top-app-bar .container {
    display: flex;
    align-items: center;
    width: 100%;
    justify-content: space-between;
}

/* Branding (Logo + Text) */
.branding {
    display: flex;
    align-items: center;
    gap: 12px;
}

.app-logo {
    height: 40px;
    width: auto;
    border-radius: 8px; /* Optional: Softens logo corners */
}

.headline {
    font-size: 22px;
    font-weight: 500;
}

/* Desktop Navigation */
.desktop-nav {
    display: none;
    gap: 8px;
}

.desktop-nav .nav-link {
    text-decoration: none;
    color: var(--md-sys-color-on-surface-variant);
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 500;
    font-size: 14px;
    transition: background-color 0.2s, color 0.2s;
}

.desktop-nav .nav-link:hover {
    background-color: rgba(0, 0, 0, 0.04);
}

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

@media (min-width: 840px) {
    .desktop-nav {
        display: flex;
    }
}

/* Trailing Icons & Desktop Socials */
.trailing-icons {
    display: flex;
    align-items: center;
    gap: 8px;
}

.trailing-icons span, 
.desktop-social-link {
    padding: 10px;
    cursor: pointer;
    border-radius: 50%;
    color: var(--md-sys-color-on-surface-variant);
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px; /* Increased from 44px */
    height: 48px; /* Increased from 44px */
    transition: background-color 0.2s;
}

.trailing-icons span:hover,
.desktop-social-link:hover {
    background-color: var(--md-sys-color-surface-variant);
    color: var(--md-sys-color-primary);
}

.desktop-social-link i, .trailing-icons span {
    font-size: 24px; /* Increased from 20px */
}

/* Hide desktop socials on mobile */
.desktop-social-link {
    display: none;
}

@media (min-width: 840px) {
    .desktop-social-link {
        display: flex;
    }
}


/* Bottom Navigation (Mobile) */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    background-color: var(--md-sys-color-surface);
    border-top: none;
    /* Default shadow (Elevation 1 equivalent for bottom) */
    box-shadow: 0 -1px 3px 1px rgba(0, 0, 0, 0.15); 
    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 1000;
    transition: background-color 0.2s, box-shadow 0.2s;
}

/* Scrolled state for Bottom Nav */
.bottom-nav.scrolled {
    background-color: var(--md-sys-color-surface-scrolled);
    /* Elevation 2 equivalent for bottom */
    box-shadow: 0 -2px 6px 2px rgba(0, 0, 0, 0.15); 
}

@media (min-width: 840px) {
    .bottom-nav {
        display: none;
    }
}

.bottom-nav .nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--md-sys-color-on-surface-variant);
    width: 64px;
    height: 100%;
}

.bottom-nav .nav-item .icon {
    font-size: 24px;
    margin-bottom: 4px;
    padding: 4px 20px;
    border-radius: 16px;
    transition: background-color 0.2s, color 0.2s;
}

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

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

.bottom-nav .nav-item.active .label {
    color: var(--md-sys-color-on-surface);
}

/* FAB Container & Buttons */
.fab-container {
    position: fixed;
    bottom: 96px; /* Above bottom nav */
    right: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    z-index: 1000;
}

.fab-primary, .fab-secondary {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    text-decoration: none;
    box-shadow: var(--md-sys-elevation-3);
    transition: transform 0.2s, box-shadow 0.2s;
    font-size: 24px;
}

/* Telegram FAB (Primary) */
.fab-primary {
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
}

/* GitHub FAB (Secondary) */
.fab-secondary {
    background-color: var(--md-sys-color-secondary-container);
    color: var(--md-sys-color-on-secondary-container);
    /* Make equal size to Primary FAB */
    width: 56px; 
    height: 56px;
    align-self: center;
}

.fab-primary:hover, .fab-secondary:hover {
    box-shadow: 0px 6px 10px 4px rgba(0,0,0,0.15);
}

.fab-primary i, .fab-secondary i {
    font-size: 32px; /* Increased icon size inside FABs */
}

.fab-primary:active, .fab-secondary:active {
    transform: scale(0.95);
}

@media (min-width: 840px) {
    .fab-container {
        display: none; /* Hide FABs on desktop */
    }
}

/* Typography Classes */
.display-large {
    font-family: var(--md-sys-typescale-display-large-font);
    font-size: var(--md-sys-typescale-display-large-size);
    font-weight: var(--md-sys-typescale-display-large-weight);
    line-height: 1.1;
    margin-bottom: 24px;
}

.headline-medium {
    font-family: var(--md-sys-typescale-headline-medium-font);
    font-size: var(--md-sys-typescale-headline-medium-size);
    font-weight: var(--md-sys-typescale-headline-medium-weight);
    margin-bottom: 24px;
}

.body-large {
    font-family: var(--md-sys-typescale-body-large-font);
    font-size: var(--md-sys-typescale-body-large-size);
    font-weight: var(--md-sys-typescale-body-large-weight);
    opacity: 0.8;
}

/* Components: Cards */
.card-elevated {
    background-color: var(--md-sys-color-surface-variant); /* Slightly darker than surface */
    border-radius: var(--md-sys-shape-corner-medium);
    box-shadow: var(--md-sys-elevation-1);
    overflow: hidden;
    transition: box-shadow 0.2s;
    display: flex;
    flex-direction: column;
}

.card-elevated:hover {
    box-shadow: var(--md-sys-elevation-2);
}

.card-image-placeholder {
    height: 160px;
    background-color: var(--md-sys-color-surface-variant);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--md-sys-color-on-surface-variant);
    filter: brightness(0.9);
}

.card-content {
    padding: 16px;
}

.card-actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
    justify-content: flex-end;
}

.card-outlined {
    background-color: var(--md-sys-color-surface);
    border: 1px solid var(--md-sys-color-outline);
    border-radius: var(--md-sys-shape-corner-medium);
    padding: 16px;
}

.card-filled {
    background-color: var(--md-sys-color-surface-variant);
    border-radius: var(--md-sys-shape-corner-large);
    padding: 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

/* Contact Page Specifics (Removed duplicate) */

.avatar-large {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 16px;
    border: 4px solid var(--md-sys-color-surface);
    box-shadow: var(--md-sys-elevation-1);
}

.contact-card .btn-filled,
.contact-card .btn-outlined {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 16px;
    text-decoration: none;
}

/* Ensure padding is consistent in contact grid context */
.contact-grid .card-filled,
.contact-grid .card-outlined {
    padding: 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    height: 100%; /* Ensure equal height */
    justify-content: center;
}

/* Buttons */
.btn-filled {
    background-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    border: none;
    border-radius: 20px;
    padding: 10px 24px;
    font-weight: 500;
    cursor: pointer;
    font-size: 14px;
    transition: box-shadow 0.2s;
    text-decoration: none; /* Remove underline */
}

.btn-filled:hover {
    box-shadow: var(--md-sys-elevation-1);
    background-image: linear-gradient(rgba(255,255,255,0.08), rgba(255,255,255,0.08));
}

.btn-outlined {
    background-color: transparent;
    border: 1px solid var(--md-sys-color-outline);
    color: var(--md-sys-color-primary);
    border-radius: 20px;
    padding: 10px 24px;
    font-weight: 500;
    cursor: pointer;
    font-size: 14px;
    text-decoration: none; /* Remove underline */
}

.btn-text {
    background: transparent;
    border: none;
    color: var(--md-sys-color-primary);
    padding: 10px 12px;
    font-weight: 500;
    cursor: pointer;
    border-radius: 20px;
}

.btn-text:hover {
    background-color: rgba(0, 108, 76, 0.08); /* Primary color at 8% opacity */
}

/* Sections */
section {
    padding: 48px 0;
}

#hero {
    min-height: 50vh;
    display: flex;
    align-items: center;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

/* WIP Card Styling */
.card-wip {
    border: 1px dashed var(--md-sys-color-outline);
    background-color: transparent;
}

.card-wip .card-image-placeholder {
    background-color: transparent;
    color: var(--md-sys-color-outline);
}

.card-wip .title-large, .card-wip .body-medium {
    opacity: 0.7;
}

/* Contact Page Specifics */
.contact-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 32px;
    margin-top: 48px;
}

.project-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 32px;
    margin-top: 48px;
}

/* Developer Info */
.developer-info {
    font-size: 14px;
    margin-top: 8px;
    opacity: 0.9;
    color: var(--md-sys-color-on-surface-variant);
}

.developer-info a {
    color: inherit;
    text-decoration: none;
    font-weight: 500;
}

.developer-info a:hover {
    text-decoration: underline;
    color: var(--md-sys-color-primary);
}

.contact-card, .project-card {
    text-align: center;
    flex: 1;
    min-width: 300px;
    max-width: 480px;
    height: 100%; /* Ensure full height in grid */
    display: flex;
    flex-direction: column;
}

/* Override constraints for project items to prevent stretching */
.project-grid .project-card {
    flex: 0 1 350px; /* Do not grow, shrink if needed, base width 350px */
    width: 350px; /* Enforce width */
    max-width: 350px; /* Prevent stretching beyond this */
}

.project-card .card-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding-bottom: 8px; /* Slight adjustment */
}

.project-card .card-actions {
    margin-top: auto;
    padding-top: 32px; /* Add extra space between text and button */
    justify-content: flex-end; /* Align button to bottom right */
}

@media (max-width: 839px) {
    .project-card .card-actions {
        justify-content: center;
    }
}

/* Project Page Specifics */
.logo-container {
    height: 160px;
    background-color: var(--md-sys-color-surface-variant);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.project-logo {
    height: 100%;
    width: 100%;
    object-fit: contain;
    padding: 24px;
}

.rounded-logo {
    width: 112px; /* 160px container - 24px padding * 2 = 112px visual size */
    height: 112px;
    padding: 0;
    border-radius: 22px; /* ~20% of 112px */
    object-fit: cover; /* Ensure image fills the rounded area */
}

/* Developer Info */
.developer-info {
    font-size: 14px;
    margin-top: 8px;
    opacity: 0.9;
    color: var(--md-sys-color-on-surface-variant);
}

.developer-info a {
    color: inherit;
    text-decoration: none;
    font-weight: 500;
}

.developer-info a:hover {
    text-decoration: underline;
    color: var(--md-sys-color-primary);
}