/* ============================================
   Custom Styles for Portfolio Website
   Modern UI Improvements
   ============================================ */

/* ============================================
   CSS Variables & Color Palette
   ============================================ */
:root {
    --primary-color: #18bc9c;
    --primary-dark: #15a085;
    --primary-light: #2ecc71;
    --secondary-color: #95a5a6;
    --text-light: #ffffff;
    --text-dark: #2c3e50;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Lato', sans-serif;
    line-height: 1.6;
}

/* ============================================
   Header & Masthead
   ============================================ */
.masthead {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    position: relative;
    overflow: hidden;
}

.masthead::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.05"><circle cx="30" cy="30" r="2"/></g></svg>');
    opacity: 0.3;
}

.masthead .container {
    position: relative;
    z-index: 1;
}

.masthead img {
    max-width: 20% !important;
    border: 5px solid rgba(255, 255, 255, 0.3);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    animation: fadeInUp 0.8s ease;
}

.masthead img:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 30px rgba(0,0,0,0.2);
}

.masthead h1 {
    font-family: 'Montserrat', sans-serif;
    font-size: 3.5rem;
    font-weight: 700;
    margin: 30px 0 20px;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.masthead h2 {
    font-size: 1.5rem;
    font-weight: 300;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.star-light {
    border: none;
    border-top: 3px solid var(--text-light);
    max-width: 250px;
    margin: 25px auto;
    opacity: 1;
    animation: fadeInUp 0.8s ease 0.6s both;
}

/* ============================================
   Sections
   ============================================ */
section {
    padding: 80px 0;
    position: relative;
}

section.bg-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
}

section h2 {
    font-family: 'Montserrat', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

section h1 {
    font-family: 'Montserrat', sans-serif;
    font-size: 2.8rem;
    font-weight: 700;
}

/* ============================================
   About Section
   ============================================ */
#about {
    padding: 60px 0;
}

#about .lead {
    font-size: 1.2rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

/* ============================================
   Skills Section
   ============================================ */
#proficiency-skills {
    padding-bottom: 80px;
}

.skill-item {
    padding: 30px 20px;
    margin-bottom: 30px;
    text-align: center;
    transition: var(--transition);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
}

.skill-item:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-lg);
}

.skill-item i,
.skill-item img {
    font-size: 75px;
    color: var(--text-light);
    margin-bottom: 20px;
    display: block;
    transition: var(--transition);
}

.skill-item:hover i,
.skill-item:hover img {
    transform: scale(1.1) rotate(5deg);
    color: var(--primary-light);
}

.skill-item h6 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-top: 15px;
    color: var(--text-light);
}

.skill-item img {
    width: 75px;
    height: 75px;
    object-fit: contain;
    filter: brightness(0) invert(1);
}

/* ============================================
   Project Cards
   ============================================ */
.projects-clean {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    padding: 80px 0;
}

.projects-clean .item {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 30px;
    min-height: 400px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.projects-clean .item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s;
}

.projects-clean .item:hover::before {
    left: 100%;
}

.projects-clean .item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    background: var(--text-light);
}

.projects-clean .item img {
    max-width: 100%;
    height: auto;
    padding: 20px;
    margin: 0 auto;
    display: block;
    transition: var(--transition);
    object-fit: contain;
}

.projects-clean .item:hover img {
    transform: scale(1.05);
}

.projects-clean .item .name {
    font-size: 1.3rem;
    font-weight: 700;
    margin: 20px 0 15px;
    color: var(--text-dark);
    transition: var(--transition);
}

.projects-clean .item:hover .name {
    color: var(--primary-color);
}

.projects-clean .item .description {
    font-size: 0.95rem;
    color: #666;
    line-height: 1.6;
    flex-grow: 1;
}

.projects-clean .intro h2 {
    color: var(--text-light);
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.projects-clean .intro p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
}

/* ============================================
   Modals
   ============================================ */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    justify-content: center;
    align-items: center;
    z-index: 9999;
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
}

.modal-content {
    background-color: var(--text-light);
    padding: 40px;
    border-radius: 15px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    position: relative;
    animation: slideUp 0.3s ease;
}

.modal-content .btn-close {
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--primary-color);
    border: none;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    color: var(--text-light);
    font-size: 24px;
    font-weight: bold;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    opacity: 1;
    z-index: 10;
}

.modal-content .btn-close:hover {
    background: var(--primary-dark);
    transform: rotate(90deg) scale(1.1);
}

.modal-content p {
    margin-bottom: 15px;
    line-height: 1.8;
    color: var(--text-dark);
}

.modal-content ul {
    margin: 20px 0;
    padding-left: 25px;
}

.modal-content ul li {
    margin-bottom: 10px;
    line-height: 1.8;
    color: #555;
}

.modal-content strong {
    color: var(--primary-color);
    font-weight: 700;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: linear-gradient(135deg, var(--primary-dark) 0%, #2c3e50 100%);
    padding: 60px 0 40px;
    color: var(--text-light);
}

.footer h4 {
    font-family: 'Montserrat', sans-serif;
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 25px;
    color: var(--text-light);
}

.footer iframe {
    border-radius: 10px;
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.footer iframe:hover {
    box-shadow: var(--shadow-lg);
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-social {
    width: 50px;
    height: 50px;
    font-size: 20px;
    margin: 0 10px;
    border: 2px solid var(--text-light);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-social:hover {
    background: var(--text-light);
    color: var(--primary-color);
    transform: translateY(-5px) scale(1.1);
    box-shadow: var(--shadow-md);
}

.copyright {
    background: rgba(0, 0, 0, 0.2);
    padding: 20px 0;
}

/* ============================================
   Scroll to Top Button
   ============================================ */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--text-light);
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    transition: var(--transition);
}

.scroll-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.3);
}

.scroll-to-top.show {
    display: flex;
    animation: fadeIn 0.3s ease;
}

/* ============================================
   Navbar Enhancements
   ============================================ */
.navbar {
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.navbar-shrink {
    padding: 10px 0;
    box-shadow: var(--shadow-md);
}

.navbar-brand {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 1.5rem;
    transition: var(--transition);
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.nav-link {
    font-weight: 600;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Fade in sections on scroll */
.fade-in {
    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: 768px) {
    .masthead {
        padding: 80px 0 60px;
    }
    
    .masthead h1 {
        font-size: 2.5rem;
    }
    
    .masthead h2 {
        font-size: 1.2rem;
    }
    
    .masthead img {
        max-width: 30% !important;
    }
    
    section {
        padding: 50px 0;
    }
    
    section h2 {
        font-size: 2rem;
    }
    
    .skill-item {
        margin-bottom: 20px;
    }
    
    .projects-clean .item {
        min-height: auto;
        padding: 25px;
    }
    
    .modal-content {
        width: 95%;
        padding: 30px 20px;
    }
    
    .footer {
        padding: 40px 0 30px;
    }
    
    .scroll-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 576px) {
    .masthead h1 {
        font-size: 2rem;
    }
    
    .masthead img {
        max-width: 40% !important;
    }
    
    .skill-item i,
    .skill-item img {
        font-size: 60px;
    }
    
    .projects-clean .item {
        padding: 20px;
    }
}

/* ============================================
   Utility Classes
   ============================================ */
.text-primary-custom {
    color: var(--primary-color) !important;
}

.bg-primary-custom {
    background-color: var(--primary-color) !important;
}

.shadow-custom {
    box-shadow: var(--shadow-md);
}

.transition-custom {
    transition: var(--transition);
}