/* ============================================
   Cybersecurity Portfolio - Main Stylesheet
   ============================================ */

/* ============================================
   CSS Custom Properties (Variables)
   ============================================ */
:root {
    /* Color Palette */
    --color-bg-primary: #0a192f;
    --color-bg-secondary: #172a45;
    --color-bg-container: rgba(30, 41, 59, 0.85);
    --color-bg-section: rgba(10, 25, 47, 0.6);
    --color-bg-input: rgba(10, 25, 47, 0.7);
    --color-bg-input-focus: rgba(10, 25, 47, 0.9);
    
    --color-cyan: #00d9ff;
    --color-cyan-light: #33e1ff;
    --color-green: #00ff88;
    --color-text-primary: #f8f9fa;
    --color-border: rgba(0, 217, 255, 0.2);
    --color-border-hover: rgba(0, 217, 255, 0.4);
    
    /* Gradients */
    --gradient-primary: linear-gradient(90deg, #00d9ff, #00ff88);
    --gradient-bg: linear-gradient(135deg, #0a192f 0%, #172a45 50%, #0a192f 100%);
    --gradient-button: linear-gradient(135deg, #00d9ff, #00ff88);
    --gradient-button-hover: linear-gradient(135deg, #00ff88, #00d9ff);
    
    /* Spacing */
    --spacing-xs: 5px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 15px;
    --spacing-xl: 20px;
    --spacing-2xl: 25px;
    --spacing-3xl: 30px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 10px;
    --radius-xl: 12px;
    --radius-2xl: 16px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.4s ease;
    
    /* Shadows */
    --shadow-glow-sm: 0 0 20px rgba(0, 217, 255, 0.4);
    --shadow-glow-md: 0 0 30px rgba(0, 217, 255, 0.3);
    --shadow-glow-lg: 0 0 40px rgba(0, 217, 255, 0.4);
    --shadow-container: 0 8px 32px rgba(0, 217, 255, 0.15), 0 0 80px rgba(0, 255, 136, 0.05);
    --shadow-container-hover: 0 12px 48px rgba(0, 217, 255, 0.2), 0 0 100px rgba(0, 255, 136, 0.08);
}

/* ============================================
   Reset and Base Styles
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    margin: 0;
    padding: 0;
    background: var(--gradient-bg);
    background-attachment: fixed;
    min-height: 100vh;
    color: var(--color-text-primary);
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Audiowide', sans-serif;
}

p {
    line-height: 1.8;
    margin: var(--spacing-md) 0;
}

/* ============================================
   Layout - Container
   ============================================ */
.container {
    width: 85%;
    max-width: 1200px;
    margin: var(--spacing-xl) auto;
    background: var(--color-bg-container);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: var(--spacing-3xl);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-container);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.container:hover {
    box-shadow: var(--shadow-container-hover);
}

.container h3 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    padding-bottom: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    text-align: center;
    font-size: 1.5em;
    margin: var(--spacing-lg) 0;
    text-shadow: var(--shadow-glow-md);
}

.container p {
    color: var(--color-text-primary);
}

/* ============================================
   Header
   ============================================ */
.header {
    text-align: center;
    padding-bottom: var(--spacing-2xl);
    border-bottom: 2px solid var(--color-border-hover);
    margin-bottom: var(--spacing-xl);
}

.header h1 {
    margin: 0;
    font-size: 2.8em;
    background: linear-gradient(90deg, var(--color-cyan) 0%, var(--color-green) 50%, var(--color-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: var(--shadow-glow-lg);
    animation: gradientShift 3s ease infinite;
    background-size: 200% auto;
}

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

.header h4 {
    color: var(--color-green);
    margin: 10px 0;
    font-weight: 400;
}

.header p {
    font-size: 1.1em;
    color: var(--color-text-primary);
}

.header p b {
    color: var(--color-cyan);
    font-weight: 600;
}

/* ============================================
   Navigation
   ============================================ */
.navigation {
    width: 100%;
    padding: var(--spacing-lg) var(--spacing-sm);
    background: linear-gradient(135deg, rgba(10, 25, 47, 0.95), rgba(30, 41, 59, 0.95));
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 20px rgba(0, 217, 255, 0.2);
    font-size: 1.4em;
    text-align: center;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-hover);
    margin-bottom: var(--spacing-xl);
}

.navigation a {
    color: var(--color-cyan);
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    margin: 0 var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
    display: inline-block;
}

.navigation a:visited {
    color: var(--color-cyan);
}

.navigation a:hover,
.navigation a.active {
    color: var(--color-green);
    background: rgba(0, 217, 255, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 217, 255, 0.3);
}

/* ============================================
   Sections
   ============================================ */
.section {
    margin-bottom: var(--spacing-xl);
}

.section h2 {
    font-size: 1.9em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    border-bottom: 2px solid var(--color-border-hover);
    padding: var(--spacing-md) 0;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    text-shadow: var(--shadow-glow-md);
}

.section h4 {
    font-size: 1.4em;
    color: var(--color-green);
    border-bottom: 1px solid var(--color-border-hover);
    padding: 10px 0;
    text-align: center;
    margin: var(--spacing-2xl) 0 var(--spacing-lg) 0;
}

.section ul {
    list-style-type: none;
    padding: 0;
    color: var(--color-text-primary);
}

.section ul li {
    padding: var(--spacing-sm) 0;
    transition: transform var(--transition-fast);
}

.section ul li:hover {
    transform: translateX(5px);
}

.work-experience ul li {
    list-style-type: disc;
    list-style-position: outside;
    margin-left: 20px;
}

.section iframe {
    border: 3px solid var(--color-border-hover);
    box-shadow: 0 4px 16px rgba(0, 217, 255, 0.2);
    border-radius: var(--radius-md);
}

/* ============================================
   Profile Sections
   ============================================ */
.profile {
    background: var(--color-bg-section) !important;
    color: var(--color-text-primary) !important;
    box-shadow: 0 4px 20px rgba(0, 217, 255, 0.15) !important;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    padding: var(--spacing-2xl);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.profile:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(0, 217, 255, 0.25) !important;
}

.profile p {
    color: var(--color-text-primary);
}

/* ============================================
   Skills Section
   ============================================ */
.skills ul {
    display: flex;
    flex-wrap: wrap;
}

.skills ul li {
    width: 50%;
    list-style-type: square;
    list-style-position: inside;
    color: var(--color-cyan);
}

.skills ul li::marker {
    color: var(--color-green);
}

/* List style utilities */
.list-square {
    list-style-type: square;
    list-style-position: inside;
}

/* ============================================
   Tables
   ============================================ */
.section table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-lg) 0;
    font-size: 14px;
}

.section th {
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.2), rgba(0, 255, 136, 0.2));
    border: 1px solid var(--color-border-hover);
    color: var(--color-green);
    font-weight: 600;
    padding: var(--spacing-lg);
    font-size: 1.1em;
}

.section td {
    border: 1px solid var(--color-border-hover);
    background: var(--color-bg-section);
    color: var(--color-text-primary);
    text-align: center;
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
}

.section td:hover {
    background: rgba(0, 217, 255, 0.1);
    transform: scale(1.02);
}

.section td img {
    transition: transform var(--transition-normal);
}

.section td img:hover {
    transform: scale(1.05);
}

/* ============================================
   Links
   ============================================ */
a {
    color: var(--color-cyan);
    background-color: transparent;
    text-decoration: none;
    transition: all var(--transition-normal);
    position: relative;
}

a:visited {
    color: var(--color-cyan);
}

a:hover {
    color: var(--color-green);
    transform: translateY(-1px);
}

a:active {
    color: var(--color-cyan-light);
}

/* ============================================
   Social Icons
   ============================================ */
.fa:hover {
    opacity: 0.85;
    transform: scale(1.05);
}

.fa-linkedin {
    background: linear-gradient(135deg, var(--color-cyan), #0077b5);
    color: #fff;
    font-size: 0.9em;
    padding: var(--spacing-sm) 10px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
    box-shadow: 0 2px 8px rgba(0, 217, 255, 0.3);
}

.fa-linkedin:hover {
    box-shadow: 0 4px 16px rgba(0, 217, 255, 0.5);
}

.fa-github {
    background: linear-gradient(135deg, #1e293b, var(--color-cyan));
    color: #fff;
    font-size: 0.9em;
    padding: var(--spacing-sm) 10px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
    box-shadow: 0 2px 8px rgba(0, 217, 255, 0.3);
}

.fa-github:hover {
    box-shadow: 0 4px 16px rgba(0, 217, 255, 0.5);
}

.fa-brands {
    transition: all var(--transition-normal);
}

.fa-brands:hover {
    transform: scale(1.05);
}

/* ============================================
   Forms
   ============================================ */
form {
    text-align: center;
    margin: var(--spacing-xl) 0;
}

form label {
    color: var(--color-cyan);
    font-weight: 500;
    margin: 10px 0 var(--spacing-xs) 0;
    display: block;
}

input[type="text"],
input[type="email"],
input[type="date"] {
    background: var(--color-bg-input);
    border: 2px solid var(--color-border-hover);
    color: var(--color-cyan);
    padding: var(--spacing-md) var(--spacing-xl);
    margin: var(--spacing-sm) 0;
    border-radius: var(--radius-md);
    font-size: 1em;
    font-family: 'Inter', sans-serif;
    transition: all var(--transition-slow);
    width: 60%;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="date"]:focus,
textarea:focus {
    width: 70%;
    border: 2px solid var(--color-cyan);
    outline: none;
    box-shadow: var(--shadow-glow-sm);
    background: var(--color-bg-input-focus);
}

textarea {
    background: var(--color-bg-input);
    border: 2px solid var(--color-border-hover);
    color: var(--color-cyan);
    padding: var(--spacing-md) var(--spacing-xl);
    margin: var(--spacing-sm) 0;
    border-radius: var(--radius-md);
    font-size: 1em;
    font-family: 'Inter', sans-serif;
    min-height: 120px;
    width: 60%;
    transition: all var(--transition-slow);
    resize: vertical;
}

button,
input[type="submit"],
input[type="reset"] {
    background: var(--gradient-button);
    border: 2px solid rgba(0, 217, 255, 0.5);
    color: var(--color-bg-primary);
    padding: 14px 35px;
    text-decoration: none;
    margin: var(--spacing-lg) var(--spacing-xs);
    cursor: pointer;
    border-radius: var(--radius-md);
    font-size: 1.1em;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 15px rgba(0, 217, 255, 0.3);
}

button:hover,
input[type="submit"]:hover,
input[type="reset"]:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 217, 255, 0.5);
    background: var(--gradient-button-hover);
}

button:active,
input[type="submit"]:active,
input[type="reset"]:active {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(0, 217, 255, 0.4);
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center {
    text-align: center;
}

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

.text-lg {
    font-size: 1.2em;
}

/* ============================================
   Responsive Design - Mobile First
   ============================================ */

/* Tablet and smaller */
@media screen and (max-width: 1024px) {
    .container {
        width: 90%;
        padding: var(--spacing-xl);
    }
    
    .header h1 {
        font-size: 2.4em;
    }
    
    .navigation {
        font-size: 1.2em;
    }
    
    .skills ul li {
        width: 100%;
    }
}

/* Mobile */
@media screen and (max-width: 768px) {
    .container {
        width: 95%;
        padding: var(--spacing-lg);
        margin: 10px auto;
    }
    
    .header h1 {
        font-size: 2em;
    }
    
    .container h3 {
        font-size: 1.3em;
    }
    
    .section h2 {
        font-size: 1.5em;
    }
    
    .section h4 {
        font-size: 1.2em;
    }
    
    .navigation {
        font-size: 1em;
        padding: 10px var(--spacing-xs);
    }
    
    .navigation a {
        display: block;
        margin: var(--spacing-xs) 0;
        padding: 10px;
    }
    
    .header p {
        font-size: 1em;
    }
    
    .header p b,
    .header p a {
        display: block;
        margin: var(--spacing-xs) 0;
    }
    
    /* Make tables responsive */
    .section table {
        font-size: 12px;
    }
    
    .section th,
    .section td {
        padding: var(--spacing-sm);
    }
    
    /* Stack table on very small screens */
    @media screen and (max-width: 480px) {
        .section table,
        .section thead,
        .section tbody,
        .section th,
        .section td,
        .section tr {
            display: block;
        }
        
        .section thead tr {
            position: absolute;
            top: -9999px;
            left: -9999px;
        }
        
        .section tr {
            margin-bottom: var(--spacing-lg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
        }
        
        .section td {
            border: none;
            position: relative;
            padding-left: 50%;
            text-align: left;
        }
        
        .section td:before {
            content: attr(data-label);
            position: absolute;
            left: var(--spacing-sm);
            width: 45%;
            padding-right: 10px;
            white-space: nowrap;
            font-weight: bold;
            color: var(--color-cyan);
        }
    }
    
    /* Form inputs full width on mobile */
    input[type="text"],
    input[type="email"],
    input[type="date"],
    textarea {
        width: 100%;
    }
    
    input[type="text"]:focus,
    input[type="email"]:focus,
    input[type="date"]:focus,
    textarea:focus {
        width: 100%;
    }
    
    button,
    input[type="submit"],
    input[type="reset"] {
        width: 100%;
        margin: var(--spacing-sm) 0;
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .container {
        box-shadow: none;
        border: 1px solid #ccc;
        background: white;
    }
    
    .navigation,
    footer {
        display: none;
    }
    
    .header h1,
    .container h3,
    .section h2 {
        color: #333;
        text-shadow: none;
        -webkit-text-fill-color: #333;
    }
    
    a {
        color: #0066cc;
        text-decoration: underline;
    }
    
    .profile {
        background: #f5f5f5 !important;
        color: #333 !important;
        box-shadow: none !important;
    }
}

/* ============================================
   Accessibility - Skip to Content
   ============================================ */
.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-cyan);
    color: var(--color-bg-primary);
    padding: var(--spacing-sm) var(--spacing-lg);
    text-decoration: none;
    border-radius: var(--radius-sm);
    z-index: 100;
}

.skip-to-content:focus {
    top: 0;
}

/* ============================================
   Back to Top Button
   ============================================ */
#backToTop {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 99;
    border: none;
    outline: none;
    background: var(--gradient-button);
    color: var(--color-bg-primary);
    cursor: pointer;
    padding: var(--spacing-lg);
    border-radius: 50%;
    font-size: 18px;
    width: 50px;
    height: 50px;
    box-shadow: 0 4px 15px rgba(0, 217, 255, 0.5);
    transition: all var(--transition-normal);
}

#backToTop:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 217, 255, 0.7);
}

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