/* 1. Global Styles & Template Variables */
:root {
    --default-font: "Roboto", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --heading-font: "Raleway", sans-serif;
    --nav-font: "Poppins", sans-serif;
    --background-color: #121212;
    --default-color: #f1f1f1;
    --heading-color: #ffffff;
    --accent-color: #1fa2ff;
    --surface-color: #1a1a1a;
    --contrast-color: #ffffff;
}

body,
html {
    margin: 0;
    padding: 0;
    font-family: var(--default-font);
    background-color: var(--background-color);
    color: var(--default-color);
    line-height: 1.6;
    scroll-behavior: smooth;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: 0.3s;
}

a:hover {
    color: color-mix(in srgb, var(--accent-color), transparent 25%);
    text-decoration: none;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--heading-color);
    font-family: var(--heading-font);
}

/* 2. Container utilities handled by Bootstrap grid system */

/* 2.1. Section Spacing */
section:not(#hero) {
    margin: 0 auto;
    max-width: 1000px;
    padding: 60px 20px;
}

/* 3. Hero Section */
.hero {
    width: 100%;
    min-height: 100vh;
    position: relative;
    padding: 80px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero.dark-background {
    background: linear-gradient(135deg, #0c0c0c 0%, #1a1a1a 100%);
}

.hero h1 {
    margin: 0;
    font-size: 64px;
    font-weight: 700;
    color: var(--heading-color);
}

.hero h1 span {
    color: var(--accent-color);
}

.hero h2 {
    margin: 5px 0 20px 0;
    font-size: 26px;
    color: var(--default-color);
}

.hero .social-links {
    margin-top: 25px;
}

.hero .social-links a {
    font-size: 32px;
    display: inline-block;
    color: color-mix(in srgb, var(--default-color), transparent 10%);
    line-height: 1;
    margin-right: 20px;
    transition: 0.3s;
}

.hero .social-links a:hover {
    color: var(--accent-color);
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 32px;
    }
    .hero h2 {
        font-size: 20px;
    }
}

/* 3.1. Button Styles */
.btn {
    display: inline-block;
    padding: 12px 24px;
    background: var(--accent-color);
    color: var(--contrast-color);
    text-decoration: none;
    border-radius: 5px;
    transition: background 0.3s;
    margin-top: 20px;
}

.btn:hover {
    background: color-mix(in srgb, var(--accent-color), transparent 20%);
}

/* 4. Header & Navigation */
.header {
    color: var(--default-color);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    padding: 0 15px;
    transition: all ease-in-out 0.3s;
    overflow-y: auto;
    z-index: 1000;
    min-width: 200px;
    background-color: var(--surface-color);
}

@media (max-width: 1199px) {
    .header {
        background-color: var(--background-color);
        border-right: 1px solid color-mix(in srgb, var(--default-color), transparent 90%);
        width: 300px;
        left: -100%;
    }
}

@media (min-width: 1200px) {
    .header ~ main {
        margin-left: 200px;
    }
}

.header.header-show {
    left: 0;
}

.header .header-toggle {
    color: var(--contrast-color);
    background-color: var(--accent-color);
    font-size: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    position: fixed;
    top: 15px;
    right: 15px;
    z-index: 1002;
    transition: background-color 0.3s;
    border: none;
}

.header .header-toggle:hover {
    background-color: color-mix(in srgb, var(--accent-color) 90%, white 15%);
}

.navmenu {
    padding: 20px 0;
    z-index: 1001;
}

.navmenu ul {
    list-style: none;
    padding: 0;
    margin: 0;
    width: 140px;
}

.navmenu a {
    color: var(--default-color);
    font-family: var(--nav-font);
    display: flex;
    align-items: center;
    padding: 10px 18px;
    margin-bottom: 8px;
    font-size: 15px;
    border-radius: 50px;
    background: color-mix(in srgb, var(--default-color), transparent 85%);
    height: 56px;
    width: 100%;
    overflow: hidden;
    transition: 0.3s;
}

.navmenu a i {
    font-size: 20px;
    margin-right: 8px;
}

.navmenu a span {
    padding: 0 5px 0 7px;
}

@media (min-width: 992px) {
    .navmenu a {
        max-width: 56px;
    }
    .navmenu a span {
        display: none;
    }
}

.navmenu a:hover,
.navmenu .active {
    color: var(--contrast-color);
    background: var(--accent-color);
    max-width: 100%;
}

.navmenu a:hover span {
    display: block;
}

/* 5. Sections & Titles */

.section-title {
    text-align: center;
    padding-bottom: 60px;
    position: relative;
}

.section-title h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 20px;
    padding-bottom: 20px;
    position: relative;
    color: var(--heading-color);
}

.section-title h2:before {
    content: "";
    position: absolute;
    display: block;
    width: 160px;
    height: 1px;
    background: color-mix(in srgb, var(--default-color), transparent 60%);
    left: 0;
    right: 0;
    bottom: 1px;
    margin: auto;
}

.section-title h2::after {
    content: "";
    position: absolute;
    display: block;
    width: 60px;
    height: 3px;
    background: var(--accent-color);
    left: 0;
    right: 0;
    bottom: 0;
    margin: auto;
}

.section-title p {
    margin-bottom: 0;
    color: color-mix(in srgb, var(--default-color), transparent 20%);
}

/* 5.1. About Me Card - Frontend-v2 Style */
.about-card {
    background: var(--surface-color);
    padding: 25px;
    border-radius: 10px;
    border: 1px solid color-mix(in srgb, var(--default-color), transparent 90%);
    transition: transform 0.3s;
    margin: 40px 0;
}

.about-card:hover {
    transform: scale(1.05);
}

.about-card h3 {
    color: var(--accent-color);
    margin-bottom: 10px;
}

.about-card p {
    color: var(--default-color);
    line-height: 1.6;
    margin-bottom: 15px;
}

.about-card .text-purple {
    color: var(--accent-color);
}

/* 6. Skills Grid - Frontend-v2 Style */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

/* Skill Item Styles for Skills Grid */
.skill-item {
    background: var(--surface-color);
    padding: 25px 20px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s ease;
    border: 1px solid color-mix(in srgb, var(--default-color), transparent 90%);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.skill-item:hover {
    transform: scale(1.05);
}

.skill-item img {
    width: 64px;
    height: 64px;
    margin-bottom: 15px;
}

.skill-item i {
    font-size: 64px;
    margin-bottom: 15px;
    color: var(--accent-color);
    display: block;
}

.skill-item h4 {
    color: var(--accent-color);
    margin: 10px 0 5px 0;
    font-size: 18px;
}

.skill-item p {
    color: color-mix(in srgb, var(--default-color), transparent 30%);
    font-size: 14px;
    margin: 0;
}

/* 6.1. System Monitoring Dashboard */
.monitoring-dashboard {
    background: var(--surface-color);
    padding: 30px;
    border-radius: 10px;
    border: 1px solid color-mix(in srgb, var(--default-color), transparent 90%);
    margin: 40px 0;
}

.status-indicator {
    text-align: center;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.status-text {
    color: var(--accent-color);
    font-weight: bold;
    font-size: 20px;
}

.status-icon {
    width: 16px;
    height: 16px;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.metric-card {
    background: var(--surface-color);
    padding: 25px 20px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s ease;
    border: 1px solid color-mix(in srgb, var(--default-color), transparent 90%);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.metric-card:hover {
    transform: scale(1.05);
}

.metric-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 15px;
}

.metric-value {
    color: var(--accent-color);
    font-size: 32px;
    font-weight: bold;
    margin: 10px 0 5px 0;
}

.metric-title {
    color: var(--accent-color);
    margin: 10px 0 5px 0;
    font-size: 18px;
}

.metric-description {
    color: color-mix(in srgb, var(--default-color), transparent 30%);
    font-size: 14px;
    margin: 0;
}

.dashboard-actions {
    text-align: left;
}

@media (max-width: 992px) {
    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .metrics-grid {
        grid-template-columns: 1fr;
    }
}

/* 6.2. Certifications & Projects Grid - Frontend-v2 Style */
.projects .cert-item h4 {
    color: var(--accent-color);
    margin-bottom: 15px;
    font-size: 20px;
    line-height: 1.3;
    display: flex;
    align-items: center;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    max-height: 80px;
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    grid-auto-rows: minmax(380px, auto);
    gap: 30px;
    margin: 40px 0;
    align-items: stretch;
}

.cert-item {
    background: var(--surface-color);
    padding: 25px;
    border-radius: 10px;
    border: 1px solid color-mix(in srgb, var(--default-color), transparent 90%);
    transition: transform 0.3s;
    display: flex;
    flex-direction: column;
    min-height: 380px;
    height: auto;
    justify-content: flex-start;
}

.cert-item:hover {
    transform: scale(1.05);
}

.cert-item h4 {
    color: var(--accent-color);
    margin-bottom: 15px;
    font-size: 20px;
    line-height: 1.3;
}

.cert-item p {
    color: var(--default-color);
    line-height: 1.6;
    margin-bottom: 15px;
}

.cert-header {
    height: 100px;
    margin-bottom: 15px;
}

.cert-content {
    flex: 1;
}

.cert-item p em {
    display: block;
    margin-bottom: 12px;
    color: #777777;
}

.cert-item p strong {
    color: var(--accent-color);
}

.cert-item .btn-project {
    margin-top: auto;
    align-self: flex-start;
}

/* 6.2. Button Project Styles */
.btn-project {
    display: inline-block;
    padding: 10px 20px;
    background: var(--accent-color);
    color: var(--contrast-color);
    border-radius: 25px;
    text-decoration: none;
    transition: 0.3s;
    font-weight: 500;
}

.btn-project:hover {
    background: color-mix(in srgb, var(--accent-color), transparent 20%);
    transform: translateY(-2px);
}

/* 7. Experience Timeline */
.experience-timeline {
    position: relative;
    padding-left: 30px;
}

.timeline-item {
    position: relative;
    padding: 20px 0;
    border-left: 2px solid var(--accent-color);
    padding-left: 30px;
    margin-bottom: 30px;
}

.timeline-item::before {
    content: "";
    position: absolute;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    left: -9px;
    top: 25px;
    background: var(--accent-color);
    border: 3px solid var(--background-color);
}

.timeline-date {
    color: var(--accent-color);
    font-weight: bold;
    margin-bottom: 5px;
}

/* 8. Contact Section */
.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.contact-item {
    display: flex;
    align-items: center;
    background: var(--surface-color);
    padding: 20px;
    border-radius: 10px;
    border: 1px solid color-mix(in srgb, var(--default-color), transparent 90%);
}

.contact-item i {
    font-size: 24px;
    color: var(--accent-color);
    margin-right: 15px;
    width: 40px;
    text-align: center;
}

.contact-item h4 {
    margin: 0 0 5px 0;
    color: var(--heading-color);
}

.contact-item p {
    margin: 0;
    color: var(--default-color);
}

/* 9. Social Links */
.social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    list-style: none;
    padding: 0;
}

.social-links a {
    color: var(--default-color);
    font-size: 24px;
    transition: color 0.3s;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.social-links a:hover {
    color: var(--accent-color);
}

.social-links a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 4px;
    border-radius: 50%;
}

.social-links a:active {
    background-color: transparent;
}

.social-links a:focus-visible {
    outline: none;
}

/* 10. Preloader */
#preloader {
    position: fixed;
    inset: 0;
    z-index: 9999;
    overflow: hidden;
    background: var(--background-color);
    transition: all 0.6s ease-out;
}

#preloader:before {
    content: "";
    position: fixed;
    top: calc(50% - 30px);
    left: calc(50% - 30px);
    border: 6px solid var(--accent-color);
    border-color: var(--accent-color) transparent var(--accent-color) transparent;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: animate-preloader 1.5s linear infinite;
}

@keyframes animate-preloader {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 11. Scroll Top */
.scroll-top {
    position: fixed;
    visibility: hidden;
    opacity: 0;
    left: 15px;
    bottom: 15px;
    z-index: 1003;
    background: var(--accent-color);
    width: 40px;
    height: 40px;
    border-radius: 4px;
    transition: all 0.4s;
    display: flex;
    align-items: center;
    justify-content: center;
}

@media (min-width: 1200px) {
    .scroll-top {
        left: 250px;
    }
}

.scroll-top i {
    font-size: 24px;
    color: var(--contrast-color);
    line-height: 0;
}

.scroll-top:hover {
    background: color-mix(in srgb, var(--accent-color), transparent 20%);
    color: var(--contrast-color);
}

.scroll-top.active {
    visibility: visible;
    opacity: 1;
}

/* 12. Accessibility & Focus States */
a:focus, button:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* 13. Media Queries for Responsive Layout */
@media (max-width: 1199px) {
    .header ~ main {
        margin-left: 0;
    }
}

@media (max-width: 768px) {
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .certifications-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    section:not(#hero) {
        padding: 40px 20px;
    }
    
    .section-title {
        padding-bottom: 40px;
    }
    
    .section-title h2 {
        font-size: 28px;
    }
}

/* 14. Disable AOS animation delay on mobile */
@media screen and (max-width: 768px) {
    [data-aos-delay] {
        transition-delay: 0 !important;
    }
}

/* 15. Typing Animation */
.typing::after {
    content: '|';
    animation: blink 1s infinite;
}

@keyframes blink {
    0% { opacity: 1; }
    50% { opacity: 0; }
    100% { opacity: 1; }
}

/* 16. Bootstrap Grid System */
.container {
    width: 100%;
    padding-right: 15px;
    padding-left: 15px;
    margin-right: auto;
    margin-left: auto;
}

@media (min-width: 576px) {
    .container { max-width: 540px; }
}

@media (min-width: 768px) {
    .container { max-width: 720px; }
}

@media (min-width: 992px) {
    .container { max-width: 960px; }
}

@media (min-width: 1200px) {
    .container { max-width: 1140px; }
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin-right: -15px;
    margin-left: -15px;
}

.col-lg-8, .col-lg-9 {
    position: relative;
    width: 100%;
    padding-right: 15px;
    padding-left: 15px;
}

@media (min-width: 992px) {
    .col-lg-8 { flex: 0 0 66.666667%; max-width: 66.666667%; }
    .col-lg-9 { flex: 0 0 75%; max-width: 75%; }
}

.justify-content-center {
    justify-content: center !important;
}

.d-flex {
    display: flex !important;
}

.flex-column {
    flex-direction: column !important;
}

.align-items-center {
    align-items: center !important;
}

.text-center {
    text-align: center !important;
}

.d-xl-none {
    display: none !important;
}

@media (max-width: 1199.98px) {
    .d-xl-none {
        display: block !important;
    }
}

.gy-4 > * {
    margin-top: 1.5rem;
}

.py-3 {
    padding-top: 1rem !important;
    padding-bottom: 1rem !important;
}

.fst-italic {
    font-style: italic !important;
}

.position-relative {
    position: relative !important;
}

.px-1 {
    padding-left: 0.25rem !important;
    padding-right: 0.25rem !important;
}

.fw-semibold {
    font-weight: 600 !important;
}

/* 17. Z-Index Scale Documentation */
/*
  Z-Index Scale:
  - 1000-1002: Header & Navigation
  - 1003: Scroll Top Button
  - 1004: EVE AI Assistant
  - 9999: Preloader
*/