/* ==========================================
   CSS VARIABLES & ROOT STYLES
   ========================================== */
:root {
    --primary-color: #1a5c38;
    --secondary-color: #2d8a5e;
    --accent-color: #3da672;
    --text-color: #1a3328;
    --text-light: #3d5c4a;
    --bg-color: #ffffff;
    --bg-secondary: #e8f5ed;
    --card-bg: #ffffff;
    --shadow-color: rgba(26, 92, 56, 0.15);
    --shadow-hover: rgba(26, 92, 56, 0.25);
    --transition: all 0.3s ease;
}

/* Dark Mode Variables */
body.dark-mode {
    --primary-color: #3da672;
    --secondary-color: #2d8a5e;
    --accent-color: #4fc98a;
    --text-color: #e8f5ed;
    --text-light: #a8d4b8;
    --bg-color: #0d261a;
    --bg-secondary: #132e1f;
    --card-bg: #1a3d28;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --shadow-hover: rgba(0, 0, 0, 0.5);
}

/* ==========================================
   BASE STYLES
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-image: url(images/bkg.png);
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: cover;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: var(--transition);
}

body.dark-mode {
    background-color: var(--bg-color);
    background-blend-mode: overlay;
}

/* ==========================================
   SCROLL PROGRESS INDICATOR
   ========================================== */
#scrollProgress {
    position: fixed;
    top: 0;
    left: 0;
    height: 4px;
    width: 0%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    z-index: 10000;
    transition: width 0.1s ease;
}

/* ==========================================
   NAVIGATION STYLES
   ========================================== */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px var(--shadow-color);
    z-index: 1000;
    transition: var(--transition);
}

body.dark-mode #navbar {
    background: rgba(26, 26, 46, 0.95);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
}

.nav-logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.nav-logo:hover {
    transform: scale(1.1);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 25px;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    background: var(--primary-color);
    color: white;
}

.theme-toggle {
    background: none;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
}

.theme-toggle:hover {
    background: var(--primary-color);
    transform: rotate(180deg);
}

/* Mobile Navigation Toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.hamburger {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--text-color);
    position: relative;
    transition: var(--transition);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 3px;
    background: var(--text-color);
    transition: var(--transition);
}

.hamburger::before { top: -8px; }
.hamburger::after { bottom: -8px; }

.nav-toggle.active .hamburger {
    background: transparent;
}

.nav-toggle.active .hamburger::before {
    transform: rotate(45deg);
    top: 0;
}

.nav-toggle.active .hamburger::after {
    transform: rotate(-45deg);
    bottom: 0;
}

/* ==========================================
   SECTION STYLES
   ========================================== */
section {
    padding: 80px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

#aboutme {
    padding-top: 80px;
    padding-bottom: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--text-color);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    margin: 15px auto 0;
    border-radius: 2px;
}

/* ==========================================
   TYPOGRAPHY
   ========================================== */
h1 {
    margin-top: -2px;
    text-align: center;
    font-size: 1.5rem;
}  

p {
    text-align: center;
    color: var(--text-light);
}

h2 {
    text-align: justify;
    margin-left: 13px;
    margin-right: 13px;
}

ul {
    margin-left: 5px;
    margin-right: 5px;
}

h3 {
    text-align: center;
    margin-left: 15px;
    margin-right: 10px;
    font-size: 20px;
    color: var(--text-color);
}

img {
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 350px;
    height: auto;
}

/* ==========================================
   TYPING ANIMATION
   ========================================== */
.typing-name {
    overflow: hidden;
    border-right: .15em solid var(--primary-color); 
    white-space: nowrap; 
    margin: 0 auto; 
    letter-spacing: .1em;
    animation: blink-caret .75s step-end infinite;
}

@keyframes typing {
    from { width: 0 }
    to { width: 100% }
}

@keyframes blink-caret {
    from, to { border-color: transparent }
    50% { border-color: var(--primary-color); }
}

/* ==========================================
   ID CARD / GRID STYLES
   ========================================== */
.grid-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    padding: 20px;
    margin: 0 auto;
    min-height: calc(100vh - 100px);
    perspective: 1000px;
}

.grid-item {
    width: 450px;
    height: 800px;
    position: relative;
    margin: 10px;
    border-radius: 15px;
    box-shadow: 0 10px 40px var(--shadow-color);
    transition: transform 2s;
    transform-style: preserve-3d;
}

.grid-container:hover .grid-item {
    transform: rotatey(180deg);
}

.front, .back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    justify-content: center;
    flex-direction: column;
}

.front {
    border-radius: 15px;
    box-shadow: 0 0 15px var(--shadow-color);
    background-image: url('images/ID.png');
    background-size: cover;
}

.back {
    border-radius: 15px;
    box-shadow: 0 0 15px var(--shadow-color);
    background-image: url('images/ID.gif');
    background-size: cover;
    transform: rotatey(180deg);
}

.description-overlay {
    color: rgb(5, 19, 6);
    text-align: left;
}

/* ==========================================
   SKILLS SECTION
   ========================================== */
#skills {
    background: var(--bg-secondary);
    border-radius: 20px;
    margin: 40px auto;
    padding: 60px 40px;
}

body.dark-mode #skills {
    background: var(--bg-secondary);
}

.skills-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: flex-start;
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.skill-category {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px var(--shadow-color);
    transition: var(--transition);
    flex: 0 1 350px;
    max-width: 400px;
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow-hover);
}

.skill-category h3 {
    text-align: left;
    margin-bottom: 25px;
    font-size: 1.3rem;
    color: var(--primary-color);
}

.skill-item {
    margin-bottom: 20px;
}

.skill-name {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

.skill-bar {
    height: 12px;
    background: var(--bg-secondary);
    border-radius: 10px;
    overflow: hidden;
}

body.dark-mode .skill-bar {
    background: rgba(255, 255, 255, 0.1);
}

.skill-progress {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 10px;
    transition: width 1.5s ease-in-out;
}

.certification {
    flex: 1 1 100%;
    max-width: 750px;
}

.cert-badge {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 10px;
    color: white;
}

.cert-icon {
    font-size: 3rem;
}

.cert-badge p {
    text-align: left;
    color: white;
    font-size: 1rem;
    line-height: 1.5;
}

/* ==========================================
   PROJECTS SECTION
   ========================================== */
#projects {
    padding: 80px 20px;
    text-align: center;
}

#projects h2 {
    margin-bottom: 20px;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.project-item {
    position: relative;
    overflow: hidden;
    border-radius: 15px;
    box-shadow: 0 5px 20px var(--shadow-color);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    background: var(--card-bg);
}

.project-item:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 15px 40px var(--shadow-hover);
}

.project-item a {
    text-decoration: none;
    color: inherit;
}

.project-item img {
    display: block;
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.project-item:hover img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.9));
    padding: 60px 20px 20px;
    transform: translateY(100%);
    transition: transform 0.4s ease;
}

.project-item:hover .project-overlay {
    transform: translateY(0);
}

.project-overlay h4 {
    color: white;
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.project-overlay p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    text-align: left;
}

/* ==========================================
   CONTACT SECTION
   ========================================== */
#contact {
    background: var(--bg-secondary);
    border-radius: 20px;
    margin: 40px auto;
    padding: 60px 40px;
}

body.dark-mode #contact {
    background: var(--bg-secondary);
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info h3 {
    text-align: left;
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.contact-info > p {
    text-align: left;
    margin-bottom: 30px;
    color: var(--text-light);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--text-color);
}

.contact-icon {
    font-size: 1.5rem;
}

.copy-email-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
}

.copy-email-btn:hover {
    background: var(--secondary-color);
    transform: scale(1.05);
}

.copy-email-btn.copied {
    background: var(--accent-color);
}

/* Contact Form */
.contact-form {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 5px 20px var(--shadow-color);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid transparent;
    border-radius: 10px;
    background: var(--bg-secondary);
    color: var(--text-color);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 10px rgba(108, 99, 255, 0.2);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.error-input {
    border-color: var(--secondary-color) !important;
}

.error-message {
    color: var(--secondary-color);
    font-size: 0.85rem;
    margin-top: 5px;
}

.success-message {
    background: var(--accent-color);
    color: white;
    padding: 15px;
    border-radius: 10px;
    margin-top: 20px;
    text-align: center;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.submit-btn {
    width: 100%;
    padding: 15px 30px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(108, 99, 255, 0.3);
}

/* ==========================================
   FOOTER
   ========================================== */
footer {
    background: var(--bg-secondary);
    padding: 40px 20px;
    text-align: center;
}

body.dark-mode footer {
    background: var(--bg-secondary);
}

.footer-content p {
    color: var(--text-light);
    margin-bottom: 10px;
}

.footer-tagline {
    font-style: italic;
    color: var(--primary-color) !important;
}

/* ==========================================
   BACK TO TOP BUTTON
   ========================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: 0 5px 20px var(--shadow-color);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 10px 30px var(--shadow-hover);
}

/* ==========================================
   FADE-IN ANIMATIONS
   ========================================== */
.fade-in-element {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 992px) {
    .contact-container {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        text-align: center;
    }
    
    .contact-info h3,
    .contact-info > p {
        text-align: center;
    }
    
    .contact-details {
        align-items: center;
    }
}

@media (max-width: 768px) {
    /* Navigation */
    .nav-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-color);
        flex-direction: column;
        align-items: center;
        padding: 30px;
        gap: 20px;
        transform: translateY(-150%);
        transition: var(--transition);
        box-shadow: 0 10px 30px var(--shadow-color);
    }
    
    .nav-menu.nav-open {
        transform: translateY(0);
    }
    
    /* Grid Item */
    .grid-item {
        width: 95%;
        max-width: 400px;
        height: 700px;
    }
    
    /* Section Title */
    .section-title {
        font-size: 2rem;
    }
    
    /* Skills */
    .skills-container {
        grid-template-columns: 1fr;
    }
    
    #skills {
        padding: 40px 20px;
    }
    
    /* Contact */
    #contact {
        padding: 40px 20px;
    }
    
    .contact-form {
        padding: 25px;
    }
    
    /* Projects */
    .project-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 10px 15px;
    }
    
    .grid-item {
        height: 600px;
    }
    
    h1 {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .skill-category {
        padding: 20px;
    }
    
    .cert-badge {
        flex-direction: column;
        text-align: center;
    }
    
    .cert-badge p {
        text-align: center;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}