/*
Theme Name: Portfolio
Description: A modern, animated portfolio theme for mobile developers and technical writers
Author: Fahim Farook
Version: 1.0
*/

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

:root {
    --primary: #0021b2;
    --secondary: #006f6b;
    --accent: #2aa06f;
    --dark: #1a202c;
    --light: #f7fafc;
    --gray: #4a5568;
    --gradient: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    --glow: 0 10px 40px rgba(102, 126, 234, 0.3);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark);
    overflow-x: hidden;
}

p {
    font-size: 1.1rem; 
    line-height: 1.8; 
    margin-bottom: 1.5rem;    
}

/* Animated Background */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(-45deg, var(--primary), var(--secondary), var(--secondary), var(--primary));
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Floating particles */
.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

.particle {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: float 20s infinite linear;
}

@keyframes float {
    0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translateY(-100vh) rotate(360deg); opacity: 0; }
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1rem 0;
    backdrop-filter: blur(20px);
    background: rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    text-decoration: none;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-menu a:hover {
    transform: translateY(-2px);
    text-shadow: 0 5px 15px rgba(255,255,255,0.4);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: white;
    transition: width 0.3s ease;
}

.nav-menu a:hover::after {
    width: 100%;
}

/* Headings and sections */
h2 {
    text-align: center; 
    margin-bottom: 3rem; 
    background: var(--gradient); 
    -webkit-background-clip: text; 
    -webkit-text-fill-color: transparent; 
    background-clip: text; 
    font-size: 2.5rem;    
}

h3 {
    color: var(--primary);
    margin-bottom: 2rem; 
    text-align: center; 
    font-size: 2rem;
}

.h3-colour {
    color: var(--primary);
}

h4 {
    color: var(--primary); 
    margin-bottom: 1rem;
}

.callout-light {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1)); 
    padding: 2rem; 
    border-radius: 15px; 
    margin-top: 2rem;
}

.callout-dark {
    text-align: center; 
    margin-top: 3rem; 
    padding: 2rem; 
    background: var(--gradient); 
    border-radius: 15px; 
    color: white;
}

.callout-white {
    background: white; 
    padding: 2rem; 
    border-radius: 15px; 
    box-shadow: 0 10px 30px rgba(0,0,0,0.1); 
    margin-top: 3rem;    
}

.callout-dark h4 {
    color: white;
}

.callout-dark:hover, .callout-light:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(102, 126, 234, 0.2);
}

.check-list {
    list-style: none;
}

.check-list li:before {
    content: '✓';
    padding-right: 8px;
}

.check-list li {
    padding-bottom: 8px;
}

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

/* Main Content Container */
.main-content {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    margin: 120px 2rem 2rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    box-shadow: var(--glow);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

/* Page Navigation */
.page-nav {
    display: flex;
    background: var(--gradient);
    overflow-x: auto;
}

.page-nav button {
    flex: 1;
    padding: 1rem 2rem;
    border: none;
    background: transparent;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    white-space: nowrap;
}

.page-nav button:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.page-nav button.active {
    background: rgba(255, 255, 255, 0.2);
    box-shadow: inset 0 -3px 0 white;
}

/* Page Content */
.page {
    display: none;
    padding: 3rem;
    min-height: 600px;
    animation: fadeIn 0.5s ease;
}

.page.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 2rem 0;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.hero p {
    font-size: 1.3rem;
    color: var(--gray);
    margin-bottom: 2rem;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Stats Section */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

/* Skills Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .page {
        padding: 2rem;
    }

    .stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .skills-grid,
    .services-grid {
        grid-template-columns: 1fr;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
}

/* Loading Animation */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    animation: fadeOut 1s ease 2s forwards;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(255,255,255,0.3);
    border-top: 3px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes fadeOut {
    to { opacity: 0; pointer-events: none; }
}