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





body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--md-sys-color-background);
    color: var(--md-sys-color-on-background);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    font-size: 16px;
}

/* Navbar - Mobile First */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: var(--md-sys-color-surface-container);
    backdrop-filter: blur(10px);
    padding: 12px 0;
    z-index: 1000;
    box-shadow: var(--md-sys-elevation-level2);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--md-sys-color-primary);
}

.nav-links {
    display: none;
    gap: 24px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--md-sys-color-on-surface);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 20px;
    transition: background-color 0.3s ease;
    font-size: 14px;
}

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

.theme-toggle {
    background: none;
    border: 2px solid var(--md-sys-color-outline);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--md-sys-color-on-surface);
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    background-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    border-color: var(--md-sys-color-primary);
}

/* Main content - Mobile First */
main {
    margin-top: 64px;
}

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

.section {
    padding: 40px 0;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--md-sys-color-primary);
    text-align: center;
    line-height: 1.2;
}

.section-subtitle {
    font-size: 16px;
    color: var(--md-sys-color-on-surface-variant);
    margin-bottom: 32px;
    text-align: center;
    line-height: 1.4;
}

/* Hero/About section - Mobile First */
.hero {
    display: flex;
    flex-direction: column;
    gap: 40px;
    align-items: center;
    min-height: 70vh;
    text-align: center;
    width: 100%;
}

.hero-content {
    width: 100%;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-content h1 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--md-sys-color-on-surface);
    line-height: 1.1;
    width: 100%;
}

.hero-content .motto {
    font-size: 18px;
    color: var(--md-sys-color-primary);
    margin-bottom: 24px;
    font-style: italic;
    line-height: 1.3;
    width: 100%;
}

.hero-content p {
    font-size: 16px;
    margin-bottom: 32px;
    color: var(--md-sys-color-on-surface-variant);
    line-height: 1.5;
    width: 100%;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
    width: 100%;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    order: -1;
    width: 100%;
}

.profile-image {
    width: 275px;
    height: 275px;
    border-radius: 24px;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    color: var(--md-sys-color-on-primary);
    overflow: hidden;
    position: relative;
}

.profile-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 24px;
}

/* Card styles */
.card {
    background-color: var(--md-sys-color-surface-container);
    border-radius: 24px;
    padding: 32px;
    margin-bottom: 24px;
    box-shadow: var(--md-sys-elevation-level1);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.card:hover {
    box-shadow: var(--md-sys-elevation-level3);
    transform: translateY(-4px);
}

.card-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--md-sys-color-on-surface);
}

.card-description {
    color: var(--md-sys-color-on-surface-variant);
    margin-bottom: 16px;
}

/* App portfolio sections - Rearchitected */
.roadmap-container {
    width: 100%;
    position: relative;
    margin-bottom: 40px;
    overflow: hidden;
    user-select: none;
}

.roadmap {
    display: flex;
    gap: 16px;
    padding: 20px 16px;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateX(0);
    align-items: stretch;
}

.roadmap-item {
    min-width: 280px;
    max-width: 320px;
    flex-shrink: 0;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateY(30px);
    opacity: 0;
    display: flex;
}

.roadmap-item.animate-in {
    transform: translateY(0);
    opacity: 1;
}

.roadmap-card {
    background-color: var(--md-sys-color-surface-container);
    border-radius: 20px;
    padding: 20px;
    box-shadow: var(--md-sys-elevation-level1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    height: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    border: 1px solid var(--md-sys-color-outline-variant);
}

.roadmap-card:hover {
    box-shadow: var(--md-sys-elevation-level3);
    transform: translateY(-4px) scale(1.02);
    border-color: var(--md-sys-color-primary);
}

.roadmap-card:active {
    transform: translateY(-2px) scale(1.01);
    transition-duration: 0.1s;
}

.roadmap-card-header {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
}

.roadmap-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    position: relative;
    font-size: 20px;
}

.roadmap-icon.android {
    background: linear-gradient(135deg, #3DDC84, #00C851);
    color: #FFFFFF;
}

.roadmap-icon.ios {
    background: linear-gradient(135deg, #007AFF, #5856D6);
    color: #FFFFFF;
}

.roadmap-icon.mac {
    background: linear-gradient(135deg, #8E8E93, #48484A);
    color: #FFFFFF;
}

.roadmap-icon.swift {
    background: linear-gradient(135deg, #FA7343, #F7431A);
    color: #FFFFFF;
}

.platform-badge {
    position: absolute;
    top: -3px;
    right: -3px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8px;
    border: 2px solid var(--md-sys-color-surface-container);
}

.platform-badge.android {
    background-color: #3DDC84;
    color: #FFFFFF;
}

.platform-badge.ios {
    background-color: #007AFF;
    color: #FFFFFF;
}

.platform-badge.mac {
    background-color: #8E8E93;
    color: #FFFFFF;
}

.roadmap-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--md-sys-color-on-surface);
    flex: 1;
    line-height: 1.3;
}

.roadmap-description {
    color: var(--md-sys-color-on-surface-variant);
    line-height: 1.4;
    font-size: 14px;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 16px;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: auto;
}

.tech-chip {
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    padding: 4px 8px;
    border-radius: 8px;
    font-size: 11px;
    font-weight: 500;
    white-space: nowrap;
}

/* Portfolio navigation - Improved */
.portfolio-nav {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    margin-top: 24px;
}

.portfolio-nav-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid var(--md-sys-color-outline);
    background-color: var(--md-sys-color-surface-container);
    color: var(--md-sys-color-on-surface);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 18px;
    user-select: none;
}

.portfolio-nav-btn:hover:not(:disabled) {
    background-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    border-color: var(--md-sys-color-primary);
    transform: scale(1.05);
    box-shadow: var(--md-sys-elevation-level2);
}

.portfolio-nav-btn:active:not(:disabled) {
    transform: scale(0.95);
    transition-duration: 0.1s;
}

.portfolio-nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    transform: none;
}

.portfolio-nav-indicators {
    display: flex;
    gap: 8px;
    align-items: center;
}

.portfolio-nav-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--md-sys-color-outline-variant);
    transition: all 0.3s ease;
    cursor: pointer;
}

.portfolio-nav-dot.active {
    background-color: var(--md-sys-color-primary);
    transform: scale(1.25);
}

.portfolio-nav-dot:hover {
    background-color: var(--md-sys-color-primary);
    opacity: 0.7;
}

/* App Dialog Modal */
.app-dialog-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.app-dialog-overlay.active {
    opacity: 1;
    visibility: visible;
}

.app-dialog {
    background-color: var(--md-sys-color-surface-container-high);
    border-radius: 28px;
    max-width: 600px;
    width: 90vw;
    max-height: 80vh;
    overflow: hidden;
    box-shadow: var(--md-sys-elevation-level3);
    transform: scale(0.8) translateY(40px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.app-dialog-overlay.active .app-dialog {
    transform: scale(1) translateY(0);
}

.app-dialog-header {
    padding: 24px 24px 16px;
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
    display: flex;
    align-items: center;
    gap: 16px;
}

.app-dialog-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    position: relative;
}

.app-dialog-header-text {
    flex: 1;
}

.app-dialog-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--md-sys-color-on-surface);
    margin-bottom: 4px;
}

.app-dialog-platform {
    font-size: 14px;
    color: var(--md-sys-color-on-surface-variant);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.app-dialog-close {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: none;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--md-sys-color-on-surface);
    transition: all 0.3s ease;
}

.app-dialog-close:hover {
    background-color: var(--md-sys-color-surface-container-highest);
}

.app-dialog-content {
    padding: 24px;
    overflow-y: auto;
    max-height: 60vh;
}

.app-dialog-description {
    color: var(--md-sys-color-on-surface-variant);
    line-height: 1.6;
    margin-bottom: 24px;
    font-size: 16px;
}

.app-dialog-tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 32px;
}

.app-dialog-tech-chip {
    background-color: var(--md-sys-color-secondary-container);
    color: var(--md-sys-color-on-secondary-container);
    padding: 8px 16px;
    border-radius: 16px;
    font-size: 14px;
    font-weight: 500;
}

.app-dialog-section {
    margin-bottom: 24px;
}

.app-dialog-section-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--md-sys-color-on-surface);
    margin-bottom: 12px;
}

.app-dialog-section-content {
    color: var(--md-sys-color-on-surface-variant);
    line-height: 1.5;
    font-size: 14px;
}

.app-dialog-actions {
    padding: 16px 24px 24px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    border-top: 1px solid var(--md-sys-color-outline-variant);
}

.app-dialog-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 20px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 14px;
    min-height: 40px;
}

.app-dialog-btn-primary {
    background-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
}

.app-dialog-btn-primary:hover {
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    transform: translateY(-2px);
    box-shadow: var(--md-sys-elevation-level2);
}

.app-dialog-btn-secondary {
    background-color: var(--md-sys-color-surface-container-highest);
    color: var(--md-sys-color-on-surface);
    border: 1px solid var(--md-sys-color-outline);
}

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

.app-dialog-btn-text {
    background: none;
    color: var(--md-sys-color-primary);
    border: none;
    padding: 8px 16px;
}

.app-dialog-btn-text:hover {
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
}

.loading-content {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    color: var(--md-sys-color-on-surface-variant);
}

.loading-spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--md-sys-color-outline-variant);
    border-top: 2px solid var(--md-sys-color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 12px;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Responsive dialog */
@media (max-width: 768px) {
    .app-dialog {
        width: 95vw;
        max-height: 90vh;
        border-radius: 24px;
    }

    .app-dialog-actions {
        flex-direction: column;
    }

    .app-dialog-btn {
        width: 100%;
        justify-content: center;
    }
}

/* Journey timeline - Mobile First */
.journey-container {
    position: relative;
    width: 100%;
    overflow: hidden;
    padding: 0 16px;
}

.journey-container::before {
    content: '';
    position: absolute;
    top: 120px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg,
            transparent 0%,
            var(--md-sys-color-outline-variant) 10%,
            var(--md-sys-color-primary) 30%,
            var(--md-sys-color-primary) 70%,
            var(--md-sys-color-outline-variant) 90%,
            transparent 100%);
    z-index: 0;
    pointer-events: none;
}

.journey-timeline {
    position: relative;
    display: flex;
    gap: 24px;
    padding: 40px 0 50px;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateX(0);
    align-items: flex-start;
}

.journey-item {
    position: relative;
    min-width: 280px;
    max-width: 300px;
    background-color: var(--md-sys-color-surface-container);
    border-radius: 20px;
    padding: 24px 20px 20px 20px;
    flex-shrink: 0;
    box-shadow: var(--md-sys-elevation-level1);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 2;
    opacity: 1;
    transform: translateY(0);
    margin-top: 60px;
}

.journey-item.current {
    opacity: 1;
    transform: translateY(0);
    box-shadow: var(--md-sys-elevation-level3);
    background-color: var(--md-sys-color-surface-container-high);
    border: 2px solid var(--md-sys-color-primary);
}

.journey-item.future {
    opacity: 0.7;
    transform: translateY(0);
}

.journey-item:hover {
    opacity: 1;
    transform: scale(1.05) translateY(-8px);
    box-shadow: var(--md-sys-elevation-level3);
}

.journey-item-icon {
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 4;
    border: 4px solid var(--md-sys-color-background);
    box-shadow: var(--md-sys-elevation-level2);
}

.journey-item-icon.education {
    background: linear-gradient(135deg, #4285F4, #34A853);
    color: #FFFFFF;
}

.journey-item-icon.internship {
    background: linear-gradient(135deg, #FF9800, #FF5722);
    color: #FFFFFF;
}

.journey-item-icon.junior {
    background: linear-gradient(135deg, #9C27B0, #673AB7);
    color: #FFFFFF;
}

.journey-item-icon.senior {
    background: linear-gradient(135deg, #6750A4, #1976D2);
    color: #FFFFFF;
}

.journey-item::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    background-color: var(--md-sys-color-outline-variant);
    border-radius: 50%;
    border: 3px solid var(--md-sys-color-background);
    z-index: 3;
    transition: all 0.3s ease;
}

.journey-item.current::before {
    width: 24px;
    height: 24px;
    top: -12px;
    background-color: var(--md-sys-color-primary);
    box-shadow: 0 0 0 4px var(--md-sys-color-primary-container);
}

.journey-item:hover::before {
    width: 20px;
    height: 20px;
    top: -10px;
    background-color: var(--md-sys-color-primary);
}

.journey-year {
    color: var(--md-sys-color-primary);
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-align: center;
}

.journey-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--md-sys-color-on-surface);
    line-height: 1.3;
    text-align: center;
}

.journey-description {
    color: var(--md-sys-color-on-surface-variant);
    font-size: 14px;
    line-height: 1.5;
    text-align: center;
}

/* Journey navigation buttons */
.journey-nav {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 32px;
}

.journey-nav-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid var(--md-sys-color-outline);
    background-color: var(--md-sys-color-surface-container);
    color: var(--md-sys-color-on-surface);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.journey-nav-btn:hover {
    background-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    border-color: var(--md-sys-color-primary);
    transform: scale(1.1);
}

.journey-nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Responsive design for journey */
@media (max-width: 768px) {
    .journey-container::before {
        top: 110px;
    }

    .journey-item {
        min-width: 280px;
        max-width: 300px;
        margin-top: 50px;
        padding: 20px 16px 16px 16px;
    }

    .journey-item-icon {
        width: 56px;
        height: 56px;
        top: -28px;
        border-radius: 14px;
    }

    .journey-timeline {
        gap: 24px;
        padding: 30px 0 50px;
    }
}

/* Contact section - Mobile First */
.contact-content {
    display: flex;
    flex-direction: column;
    gap: 32px;
    align-items: center;
}

.contact-info {
    width: 100%;
    max-width: 800px;
}

.contact-social-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    width: 100%;
}

/* Desktop: show full button info */
@media (min-width: 769px) {
    .contact-social-row {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 16px;
    }
}

/* Tablet */
@media (max-width: 768px) and (min-width: 481px) {
    .contact-social-row {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
        gap: 14px;
    }
}

/* Mobile: show only icons */
@media (max-width: 480px) {
    .contact-social-row {
        grid-template-columns: repeat(5, 1fr);
        gap: 8px;
    }

    .contact-social-row .contact-item {
        flex-direction: column;
        padding: 12px 8px;
        text-align: center;
        min-height: 70px;
        border-radius: 12px;
    }

    .contact-social-row .contact-item-text {
        display: none;
    }

    .contact-social-row .contact-icon {
        width: 36px;
        height: 36px;
        margin: 0 auto;
    }
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background-color: var(--md-sys-color-surface-container);
    border-radius: 16px;
    text-decoration: none;
    color: var(--md-sys-color-on-surface);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--md-sys-color-outline-variant);
}

.contact-item:hover {
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    transform: translateY(-2px);
    box-shadow: var(--md-sys-elevation-level2);
    border-color: var(--md-sys-color-primary);
}

.contact-item:active {
    transform: translateY(0);
    transition-duration: 0.1s;
}

.contact-icon {
    width: 48px;
    height: 48px;
    background-color: var(--md-sys-color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--md-sys-color-on-primary);
    flex-shrink: 0;
}

.contact-item-text h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
    color: inherit;
}

.contact-item-text p {
    font-size: 14px;
    opacity: 0.8;
    margin: 0;
}



/* Footer */
.footer {
    background-color: var(--md-sys-color-surface-container-high);
    padding: 40px 0;
    text-align: center;
    color: var(--md-sys-color-on-surface-variant);
}

.footer p {
    margin-bottom: 16px;
}

.footer-legal {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 20px;
    margin-top: 8px;
    font-size: 14px;
}

.footer-legal a {
    color: var(--md-sys-color-primary);
    text-decoration: none;
    padding: 4px 10px;
    border-radius: 14px;
    transition: background-color .25s ease, color .25s ease;
}

.footer-legal a:hover {
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
}


.contact-social-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: center;
    margin-top: 2rem;
}

.contact-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    background: #f5f5f5;
    border-radius: 1rem;
    padding: 1rem;
    width: 80px;
    height: 80px;
    position: relative;
    transition: all 0.3s ease;
    overflow: hidden;
}

.contact-item:hover {
    background: #e0e0e0;
    width: 180px;
    height: 120px;
}

.contact-icon {
    font-size: 24px;
    color: #333;
    transition: transform 0.3s;
}

.contact-item:hover .contact-icon {
    transform: scale(1.2);
}

.contact-item-text {
    opacity: 0;
    transform: translateY(10px);
    text-align: center;
    color: #111;
    transition: all 0.3s ease;
    pointer-events: none;
}

.contact-item:hover .contact-item-text {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.contact-item-text h3 {
    margin: 0.25rem 0 0;
    font-size: 0.9rem;
    font-weight: 600;
}

.contact-item-text p {
    margin: 0;
    font-size: 0.75rem;
    color: #555;
}


/* Responsive Design - Progressive Enhancement */

/* Small Mobile (320px - 480px) */
@media (max-width: 480px) {
    .container {
        padding: 0 12px;
    }



    .section {
        padding: 32px 0;
    }

    .section-title {
        font-size: 28px;
    }

    .section-subtitle {
        font-size: 15px;
    }

    .hero-content h1 {
        font-size: 32px;
    }

    .hero-content .motto {
        font-size: 16px;
    }

    .hero-content p {
        font-size: 15px;
    }

    .profile-image {
        width: 160px;
        height: 160px;
        font-size: 64px;
    }

    .roadmap {
        padding: 16px 12px;
        gap: 12px;
    }

    .roadmap-item {
        min-width: 260px;
        max-width: 280px;
    }

    .roadmap-card {
        padding: 16px;
    }

    .roadmap-title {
        font-size: 16px;
    }

    .roadmap-description {
        font-size: 13px;
        -webkit-line-clamp: 3;
    }

    .journey-container {
        padding: 0 8px;
    }

    .journey-timeline {
        gap: 20px;
        padding: 30px 0 40px;
    }

    .journey-item {
        min-width: 260px;
        max-width: 280px;
        padding: 16px;
    }
}

/* Tablet Portrait (481px - 768px) */
@media (min-width: 481px) and (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    .section {
        padding: 48px 0;
    }

    .section-title {
        font-size: 36px;
    }

    .section-subtitle {
        font-size: 17px;
    }

    .hero-content h1 {
        font-size: 40px;
    }

    .hero-content .motto {
        font-size: 20px;
    }

    .profile-image {
        width: 220px;
        height: 220px;
        font-size: 88px;
    }

    .roadmap {
        padding: 18px 16px;
        gap: 16px;
    }

    .roadmap-item {
        min-width: 300px;
        max-width: 340px;
    }

    .journey-container {
        padding: 0 12px;
    }

    .journey-timeline {
        gap: 24px;
        padding: 35px 0 45px;
    }

    .journey-item {
        min-width: 300px;
        max-width: 320px;
        padding: 18px;
    }
}

/* Tablet Landscape & Small Desktop (769px - 1024px) */
@media (min-width: 769px) {
    .navbar {
        padding: 16px 0;
    }

    .nav-container {
        padding: 0 24px;
    }

    .nav-links {
        display: flex;
    }

    .logo {
        font-size: 24px;
    }

    .theme-toggle {
        width: 48px;
        height: 48px;
    }

    main {
        margin-top: 80px;
    }

    .container {
        padding: 0 32px;
    }

    .section {
        padding: 64px 0;
    }

    .section-title {
        font-size: 42px;
    }

    .section-subtitle {
        font-size: 18px;
    }

    .hero {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 60px;
        text-align: left;
        min-height: 75vh;
        align-items: center;
    }

    .hero-content {
        max-width: none;
        align-items: flex-start;
    }

    .hero-content h1,
    .hero-content .motto,
    .hero-content p {
        text-align: left;
    }

    .hero-buttons {
        justify-content: flex-start;
    }

    .hero-image {
        order: 0;
        justify-content: flex-end;
    }

    .hero-content h1 {
        font-size: 48px;
    }

    .hero-content .motto {
        font-size: 22px;
    }

    .hero-content p {
        font-size: 17px;
    }

    .profile-image {
        width: 280px;
        height: 280px;
        font-size: 112px;
    }

    .roadmap {
        gap: 24px;
        padding: 24px 32px;
        justify-content: flex-start;
    }

    .roadmap-item {
        min-width: 340px;
        max-width: 380px;
    }

    .journey-container {
        padding: 0 32px;
    }

    .journey-timeline {
        gap: 40px;
        padding: 40px 0;
        justify-content: flex-start;
    }

    .journey-item {
        min-width: 320px;
        max-width: 350px;
        padding: 24px;
        opacity: 0.4;
        transform: scale(0.85) translateY(20px);
    }

    .journey-item.current {
        opacity: 1;
        transform: scale(1) translateY(0);
        border: none;
    }

    .journey-item.future {
        opacity: 0.3;
        transform: scale(0.8) translateY(30px);
    }

    .journey-item:hover {
        opacity: 1;
        transform: scale(1.05) translateY(-8px);
        box-shadow: var(--md-sys-elevation-level3);
    }

    .btn {
        flex: none;
        max-width: none;
        padding: 16px 32px;
        font-size: 16px;
    }

    .roadmap-card {
        padding: 24px;
        border-radius: 24px;
    }

    .roadmap-icon {
        width: 56px;
        height: 56px;
        border-radius: 16px;
        font-size: 24px;
    }

    .roadmap-title {
        font-size: 20px;
    }

    .roadmap-description {
        font-size: 15px;
        -webkit-line-clamp: 5;
    }

    .portfolio-nav {
        margin-top: 32px;
    }

    .portfolio-nav-btn {
        width: 52px;
        height: 52px;
    }

    .contact-content {
        display: flex;
        flex-direction: column;
        gap: 32px;
        align-items: center;
        max-width: 600px;
        margin: 0 auto;
    }

    .contact-info {
        gap: 20px;
    }


}

/* Large Desktop (1025px+) */
@media (min-width: 1025px) {
    .container {
        padding: 0 40px;
    }

    .section {
        padding: 80px 0;
    }

    .section-title {
        font-size: 48px;
    }

    .section-subtitle {
        font-size: 20px;
    }

    .hero {
        gap: 80px;
        min-height: 80vh;
    }

    .hero-content h1 {
        font-size: 56px;
    }

    .hero-content .motto {
        font-size: 24px;
    }

    .hero-content p {
        font-size: 18px;
    }

    .profile-image {
        width: 320px;
        height: 320px;
        font-size: 128px;
    }

    .roadmap {
        gap: 28px;
        padding: 28px 40px;
        justify-content: flex-start;
    }

    .roadmap-item {
        min-width: 360px;
        max-width: 400px;
    }

    .journey-container {
        padding: 0 40px;
    }

    .journey-timeline {
        gap: 48px;
        padding: 40px 0;
        justify-content: flex-start;
    }
}

/* Extra Large Desktop (1440px+) */
@media (min-width: 1440px) {
    .container {
        max-width: 1320px;
    }

    .roadmap {
        gap: 32px;
        padding: 32px 40px;
        justify-content: flex-start;
    }

    .roadmap-item {
        min-width: 380px;
        max-width: 420px;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Button styles - Mobile First */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    border-radius: 24px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    cursor: pointer;
    font-size: 14px;
    min-height: 48px;
    white-space: nowrap;
    flex: 1;
    max-width: 200px;
}

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

.btn-primary:hover {
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    transform: translateY(-2px);
    box-shadow: var(--md-sys-elevation-level2);
}

.btn-primary:active {
    transform: translateY(0);
    transition-duration: 0.1s;
}

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

.btn-outline:hover {
    background-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    transform: translateY(-2px);
    box-shadow: var(--md-sys-elevation-level2);
}

.btn-outline:active {
    transform: translateY(0);
    transition-duration: 0.1s;
}