/* Katherine Millan Portfolio - Enhanced CSS */

/* CSS Reset and Variables */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Pink Color Palette */
    --primary-pink: #FF69B4;
    --soft-pink: #FFB6C1;
    --pale-pink: #FFDDF4;
    --deep-pink: #FF1493;
    --rose-pink: #FF85B3;
    --coral-pink: #FF6B9D;
    
    /* Neutral Colors */
    --text-dark: #2D3436;
    --text-light: #636E72;
    --white: #FFFFFF;
    --off-white: #FAFAFA;
    --glass-white: rgba(255, 255, 255, 0.1);
    
    /* Gradients */
    --gradient-pink: linear-gradient(135deg, #FF69B4 0%, #FF1493 100%);
    --gradient-soft: linear-gradient(135deg, #FFB6C1 0%, #FF85B3 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255, 182, 193, 0.1) 0%, rgba(255, 105, 180, 0.1) 100%);
    
    /* Shadows */
    --shadow-sm: 0 2px 10px rgba(255, 105, 180, 0.1);
    --shadow-md: 0 10px 30px rgba(255, 105, 180, 0.15);
    --shadow-lg: 0 20px 60px rgba(255, 105, 180, 0.2);
    --shadow-glow: 0 0 40px rgba(255, 105, 180, 0.3);
    
    /* Animations */
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Base Styles */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
    background: var(--off-white);
    position: relative;
}

/* Loading Screen */
.loader-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loader {
    width: 60px;
    height: 60px;
    border: 3px solid var(--pale-pink);
    border-top-color: var(--primary-pink);
    border-radius: 50%;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Navigation - Enhanced with Glassmorphism */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 105, 180, 0.1);
    z-index: 1000;
    padding: 1.2rem 2rem;
    transition: var(--transition-smooth);
}

nav.scrolled {
    padding: 0.8rem 2rem;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-md);
}

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

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    background: var(--gradient-pink);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -1px;
    transition: var(--transition-smooth);
}

.logo:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: var(--transition-smooth);
    padding: 0.5rem 0;
}

.nav-links a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-pink);
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: var(--primary-pink);
}

.nav-links a:hover::before {
    width: 100%;
}

/* Mobile Menu Button */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-dark);
    transition: var(--transition-smooth);
}

/* Hero Section - Enhanced */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--pale-pink) 0%, var(--white) 50%, var(--soft-pink) 100%);
}

/* Animated Background Pattern */
.hero::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    background-image: 
        radial-gradient(circle at 20% 80%, var(--soft-pink) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, var(--pale-pink) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, var(--rose-pink) 0%, transparent 50%);
    animation: float 30s ease-in-out infinite;
    opacity: 0.4;
}

.hero::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23FF69B4' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

@keyframes float {
    0%, 100% { transform: translate(-50%, -50%) rotate(0deg) scale(1); }
    33% { transform: translate(-40%, -60%) rotate(120deg) scale(1.1); }
    66% { transform: translate(-60%, -40%) rotate(240deg) scale(0.9); }
}

.hero-content {
    text-align: center;
    z-index: 1;
    padding: 2rem;
    animation: fadeInUp 1s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 800;
    margin-bottom: 1rem;
    background: var(--gradient-pink);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: glow 3s ease-in-out infinite alternate;
    letter-spacing: -2px;
}

@keyframes glow {
    from { 
        filter: drop-shadow(0 0 20px rgba(255, 105, 180, 0.5));
        transform: scale(1);
    }
    to { 
        filter: drop-shadow(0 0 30px rgba(255, 105, 180, 0.8));
        transform: scale(1.02);
    }
}

.hero .subtitle {
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: var(--text-light);
    margin-bottom: 2rem;
    font-weight: 400;
    opacity: 0;
    animation: fadeIn 1s ease 0.5s forwards;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

/* Buttons - Enhanced */
.cta-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.btn {
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-smooth);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-pink);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:hover::before {
    width: 300px;
    height: 300px;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.9);
    color: var(--primary-pink);
    border: 2px solid var(--primary-pink);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: var(--primary-pink);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

/* About Section - Enhanced */
.about {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    text-align: center;
    margin-bottom: 4rem;
    position: relative;
    color: var(--text-dark);
    font-weight: 800;
    letter-spacing: -1px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--gradient-pink);
    border-radius: 2px;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.about-text strong {
    color: var(--primary-pink);
    font-weight: 600;
}

/* Profile Image - Enhanced */
.profile-img {
    width: 350px;
    height: 350px;
    border-radius: 50%;
    background: var(--gradient-pink);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10rem;
    color: var(--white);
    box-shadow: var(--shadow-lg);
    margin: 0 auto;
    position: relative;
    overflow: hidden;
    transition: var(--transition-smooth);
    padding: 8px;
}

.profile-photo {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    object-position: center;
    position: relative;
    z-index: 2;
}

.profile-img:hover {
    transform: scale(1.05) rotate(5deg);
    box-shadow: var(--shadow-glow);
}

.profile-img::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.3), transparent),
        radial-gradient(circle at 70% 70%, rgba(255, 255, 255, 0.1), transparent);
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* Skills Section - Enhanced with Glassmorphism */
.skills {
    background: linear-gradient(135deg, var(--pale-pink) 0%, var(--off-white) 100%);
    padding: 6rem 2rem;
    position: relative;
    overflow: hidden;
}

.skills::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--soft-pink) 0%, transparent 70%);
    top: -250px;
    right: -250px;
    opacity: 0.3;
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.skill-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 105, 180, 0.2);
    padding: 2.5rem;
    border-radius: 24px;
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--gradient-pink);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s ease;
}

.skill-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-lg);
    background: rgba(255, 255, 255, 0.9);
}

.skill-card:hover::before {
    transform: scaleX(1);
}

.skill-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 4px 8px rgba(255, 105, 180, 0.3));
    animation: bounce 2s ease-in-out infinite;
}

.skill-card:hover .skill-icon {
    animation-play-state: paused;
    transform: scale(1.1);
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.skill-title {
    font-size: 1.4rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
    font-weight: 700;
}

.skill-list {
    color: var(--text-light);
    line-height: 1.8;
    font-size: 0.95rem;
}

/* Experience Timeline - Enhanced */
.experience {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.timeline {
    position: relative;
    margin-top: 4rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 100%;
    background: var(--gradient-pink);
    border-radius: 2px;
}

.timeline-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4rem;
    position: relative;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-content {
    width: 45%;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 105, 180, 0.1);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    position: relative;
    transition: var(--transition-smooth);
}

.timeline-content:hover {
    transform: scale(1.03);
    box-shadow: var(--shadow-lg);
    background: var(--white);
}

.timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 24px;
    background: var(--gradient-pink);
    border-radius: 50%;
    border: 5px solid var(--white);
    box-shadow: 0 0 0 5px var(--pale-pink);
    transition: var(--transition-smooth);
}

.timeline-item:hover .timeline-dot {
    transform: translateX(-50%) scale(1.3);
    box-shadow: 0 0 0 8px var(--soft-pink);
}

.timeline-date {
    font-size: 0.9rem;
    color: var(--primary-pink);
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.timeline-title {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.timeline-company {
    color: var(--text-light);
    font-style: italic;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.timeline-description {
    color: var(--text-light);
    line-height: 1.8;
}

/* Contact Section - Enhanced */
.contact {
    background: linear-gradient(135deg, var(--soft-pink) 0%, var(--pale-pink) 100%);
    padding: 6rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23FF69B4' fill-opacity='0.03'%3E%3Cpath d='M0 40L40 0H20L0 20M40 40V20L20 40'/%3E%3C/g%3E%3C/svg%3E");
}

.contact-container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-radius: 50px;
    color: var(--text-dark);
    text-decoration: none;
    transition: var(--transition-smooth);
    font-weight: 500;
}

.contact-item:hover {
    background: var(--white);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    color: var(--deep-pink);
}

.contact-icon {
    font-size: 1.5rem;
    filter: drop-shadow(0 2px 4px rgba(255, 105, 180, 0.3));
}

/* Footer - Enhanced */
footer {
    background: linear-gradient(135deg, var(--text-dark) 0%, #1a1a1a 100%);
    color: var(--white);
    text-align: center;
    padding: 3rem 2rem;
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-pink);
}

footer p {
    font-size: 0.95rem;
    opacity: 0.9;
}

/* Scroll Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.fade-in-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.fade-in-right {
    opacity: 0;
    transform: translateX(40px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    /* Navigation */
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        gap: 2rem;
        transition: right 0.3s ease;
        box-shadow: -5px 0 20px rgba(0, 0, 0, 0.1);
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .menu-toggle {
        display: flex;
        z-index: 1001;
    }
    
    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    /* Hero */
    .hero h1 {
        font-size: 2.5rem;
    }
    
    /* About */
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }
    
    .profile-img {
        width: 250px;
        height: 250px;
        font-size: 6rem;
        padding: 6px;
    }
    
    /* Timeline */
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item {
        flex-direction: column !important;
        margin-left: 50px;
    }
    
    .timeline-content {
        width: 100%;
    }
    
    .timeline-dot {
        left: 30px;
    }
    
    /* Skills */
    .skills-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    /* Contact */
    .contact-info {
        flex-direction: column;
        gap: 1rem;
        align-items: center;
    }
    
    .contact-item {
        width: 100%;
        max-width: 300px;
    }
}

/* Print Styles */
@media print {
    nav, .hero::before, .hero::after {
        display: none;
    }
    
    .hero {
        min-height: auto;
        padding: 2rem 0;
    }
    
    .skill-card, .timeline-content {
        break-inside: avoid;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: var(--pale-pink);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-pink);
    border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--deep-pink);
}

/* Selection Style */
::selection {
    background: var(--primary-pink);
    color: var(--white);
}

::-moz-selection {
    background: var(--primary-pink);
    color: var(--white);
}