:root {
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --accent: #38bdf8;
    --accent-hover: #0284c7;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --card-bg: #1e293b;
}

/* This single line enables smooth scrolling for the entire page */
html {
    scroll-behavior: smooth;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-darker);
    background-image: radial-gradient(circle at top right, #1e293b, transparent 40%),
                      radial-gradient(circle at bottom left, #0f172a, transparent 40%);
    color: var(--text-main);
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
nav {
    background-color: rgba(2, 6, 23, 0.8);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 1px;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color 0.3s;
}

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

/* Header & Profile Image */
header {
    padding: 120px 0 100px 0;
    text-align: center;
}

.profile-img {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--accent);
    margin-bottom: 25px;
    box-shadow: 0 0 20px rgba(56, 189, 248, 0.15);
}

header h1 {
    font-size: 3.5rem;
    margin-bottom: 10px;
    letter-spacing: -1px;
}

header h2 {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 25px;
    font-weight: 400;
}

.summary-text {
    max-width: 800px;
    margin: 0 auto 40px auto;
    color: var(--text-muted);
    font-size: 1.1rem;
    text-align: center;
    line-height: 1.8;
}

/* Buttons */
.btn {
    display: inline-block;
    background-color: var(--accent);
    color: var(--bg-darker);
    padding: 14px 30px;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

/* Outline Button (to stle the button) */
.btn-outline {
    display: inline-block;
    border: 2px solid var(--accent);
    color: var(--accent);
    padding: 10px 24px;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    transition: all 0.3s ease;
    background: transparent;
}

.btn-outline:hover {
    background-color: var(--accent);
    color: var(--bg-darker);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(56, 189, 248, 0.2);
}

/* Sections & Grid */
section {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    letter-spacing: -0.5px;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.project-card {
    background: var(--card-bg);
    padding: 40px 30px;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    border-color: rgba(56, 189, 248, 0.3);
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 20px;
}

.project-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    object-position: top; /* Focuses on the top half of the calculator */
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid rgba(255,255,255,0.05);
}

.project-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
}

.project-card p {
    color: var(--text-muted);
    margin-bottom: 25px;
    font-size: 0.95rem;
}

.demo-btn {
    background-color: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    width: 100%;
}

.demo-btn:hover {
    background-color: var(--accent);
    color: var(--bg-darker);
}

/* Contact & Footer */
#contact {
    text-align: center;
    background-color: var(--bg-dark);
    border-top: 1px solid rgba(255,255,255,0.05);
}

#contact p {
    margin-bottom: 40px;
    color: var(--text-muted);
    font-size: 1.1rem;
}

footer {
    text-align: center;
    padding: 30px;
    background: var(--bg-darker);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Calculator UI Styles */
.calculator-ui {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.calculator-ui input, .calculator-ui select {
    width: 100%;
    padding: 10px;
    border-radius: 4px;
    border: 1px solid rgba(255,255,255,0.1);
    background: var(--bg-dark);
    color: var(--text-main);
    font-size: 1rem;
}

.calculator-ui input:focus, .calculator-ui select:focus {
    outline: none;
    border-color: var(--accent);
}

.calc-output {
    margin-top: 15px;
    padding: 12px;
    background: rgba(56, 189, 248, 0.1);
    border-left: 4px solid var(--accent);
    border-radius: 4px;
    font-family: monospace;
    font-size: 1.1rem;
    color: var(--text-main);
}

.hidden {
    display: none;
}
/* --- Calculator Page Specific Styles --- */
.calculator-wrapper {
    max-width: 400px;
    margin: 0 auto;
}

/* The Calculator Body */
.calculator-ui {
    display: block; /* This fixes the squished side-by-side bug! */
    background: #2a2d35; /* Matte dark grey plastic */
    padding: 30px;
    border-radius: 12px;
    /* Creates a realistic 3D casing effect */
    box-shadow: 
        15px 15px 30px rgba(0,0,0,0.6), 
        inset -3px -3px 10px rgba(0,0,0,0.5), 
        inset 3px 3px 10px rgba(255,255,255,0.1);
    border: 1px solid #1a1c23;
}

/* The LCD Display */
.calc-display {
    background: #8fa082; /* Classic retro LCD Green/Grey */
    color: #111512; /* Dark text */
    font-size: 3.5rem;
    text-align: right;
    padding: 20px 15px;
    border-radius: 6px;
    margin-bottom: 25px;
    overflow-x: auto;
    /* Makes the screen look physically pushed into the casing */
    border: inset 4px #1c1f24; 
    box-shadow: inset 0px 5px 10px rgba(0,0,0,0.3);
    font-family: 'Courier New', Courier, monospace;
    font-weight: bold;
    letter-spacing: 2px;
}

/* Keypad Grid */
.calc-keypad {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px; /* Creates even spacing so buttons fill the width */
}

/* The Base Buttons */
.calc-btn {
    background: #e0e0e0; /* Classic light grey buttons */
    color: #333;
    border: none;
    padding: 20px 0;
    font-size: 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    width: 100%; /* Forces buttons to expand to grid size */
    /* Creates a thick 3D bottom edge */
    box-shadow: 0 5px #a0a0a0, inset 0px 2px 2px rgba(255,255,255,0.8);
    transition: all 0.1s ease;
    text-align: center;
}

/* Physical Button Press Effect */
.calc-btn:active {
    transform: translateY(5px); /* Pushes the button down */
    box-shadow: 0 0px #a0a0a0, inset 0px 2px 2px rgba(255,255,255,0.8);
}

.calc-btn:hover {
    background: #f0f0f0;
}

/* Operator Buttons (Divide, Multiply, Subtract, Add) */
.calc-btn.op {
    background: #4a5568;
    color: white;
    box-shadow: 0 5px #2d3748, inset 0px 2px 2px rgba(255,255,255,0.2);
}
.calc-btn.op:active {
    box-shadow: 0 0px #2d3748, inset 0px 2px 2px rgba(255,255,255,0.2);
}
.calc-btn.op:hover {
    background: #5a667b;
}

/* Clear Button */
.calc-btn.clear {
    grid-column: span 3;
    background: #e53e3e;
    color: white;
    box-shadow: 0 5px #9b2c2c, inset 0px 2px 2px rgba(255,255,255,0.2);
}
.calc-btn.clear:active {
    box-shadow: 0 0px #9b2c2c, inset 0px 2px 2px rgba(255,255,255,0.2);
}
.calc-btn.clear:hover {
    background: #f56565;
}

/* Zero Button */
.calc-btn.zero {
    grid-column: span 2;
}

/* Equal Button */
.calc-btn.equal {
    grid-column: span 2;
    background: #3182ce;
    color: white;
    box-shadow: 0 5px #2b6cb0, inset 0px 2px 2px rgba(255,255,255,0.2);
}
.calc-btn.equal:active {
    box-shadow: 0 0px #2b6cb0, inset 0px 2px 2px rgba(255,255,255,0.2);
}
.calc-btn.equal:hover {
    background: #4299e1;
}

/* --- Audit Tool Workspace Styles (Standalone App Interface) --- */
.audit-workspace {
    background: #ffffff; /* Crisp white background */
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    margin-bottom: 40px;
    overflow: hidden;
    /* Adds a heavy drop shadow so it looks like a floating window */
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.1);
    color: #0f172a; 
}

.workspace-header {
    background: #f8fafc;
    padding: 20px;
    border-bottom: 1px solid #e2e8f0;
}

.workspace-header h4 {
    color: #0f172a;
    margin-bottom: 5px;
}

.workspace-header p {
    color: #64748b;
    font-size: 0.95rem;
    margin: 0;
}

.file-upload-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    padding: 20px;
    background: #ffffff;
}

.upload-zone label {
    display: block;
    font-weight: 600;
    color: #0284c7; /* Professional blue accent */
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.file-input {
    width: 100%;
    padding: 10px;
    background: #f1f5f9;
    border: 1px dashed #94a3b8;
    border-radius: 6px;
    color: #334155;
    cursor: pointer;
}

.workspace-controls {
    padding: 0 20px 20px 20px;
    display: flex;
    justify-content: center; /* This line centers the buttons */
    gap: 15px;
    background: #ffffff;
}

/* Adjusting button colors specifically for the light workspace */
.workspace-controls .btn {
    background: #0284c7;
    color: white;
}
.workspace-controls .btn-outline {
    border-color: #0284c7;
    color: #0284c7;
}
.workspace-controls .btn-outline:hover {
    background: #0284c7;
    color: white;
}

.diff-viewer {
    display: grid;
    grid-template-columns: 1fr 1fr;
    border-top: 1px solid #e2e8f0;
}

.pane {
    display: flex;
    flex-direction: column;
}

.pane:first-child {
    border-right: 1px solid #e2e8f0;
}

.pane-header {
    background: #f1f5f9;
    padding: 10px 20px;
    font-size: 0.85rem;
    font-weight: 600;
    color: #475569;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: 1px solid #e2e8f0;
}

.pane-content {
    background: #ffffff;
    height: 400px;
    overflow-y: auto;
    padding: 0; /* Removed padding so the line numbers touch the far left edge */
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.95rem;
    color: #334155;
    counter-reset: line-number; /* Initializes the automatic line counting system */
}

/* Logic Highlighting Classes */
.diff-line {
    position: relative; /* Required for the sidebar positioning */
    padding: 2px 8px 2px 55px; /* 55px left padding makes room for the numbers */
    min-height: 24px; 
    word-break: break-all;
    white-space: pre-wrap; 
    /* Removed margins so the sidebars stack into a continuous solid column */
}

/* The Notepad++ Style Line Number Sidebar */
.diff-line::before {
    counter-increment: line-number;
    content: counter(line-number);
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0; /* Stretches to the full height even if the text wraps downward */
    width: 45px;
    background-color: #f1f5f9; /* Classic light gray sidebar */
    color: #94a3b8;
    text-align: right;
    padding-right: 10px;
    padding-top: 2px; /* Matches the top padding of the text */
    font-size: 0.85rem;
    border-right: 1px solid #e2e8f0;
    user-select: none; /* Prevents users from accidentally copying the line numbers */
}

/* Updated color classes (removed the old left border for a cleaner IDE look) */
.diff-red {
    background: #fee2e2;
    color: #991b1b;
}

.diff-green {
    background: #dcfce7;
    color: #166534;
}

/* Fades out the non-highlighted text so the colors pop */
.diff-muted {
    color: #cbd5e1; 
}

/* --- AWS Architecture Simulation Workspace --- */
.cloud-workspace {
    background: #ffffff;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    margin-bottom: 40px;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5);
    display: flex;
    flex-direction: column;
}

.cloud-controls {
    background: #f8fafc;
    padding: 20px;
    border-bottom: 1px solid #e2e8f0;
}

.cloud-controls h4 {
    color: #0f172a;
    margin-bottom: 15px;
}

.cloud-canvas {
    position: relative;
    height: 350px;
    background: #0f172a; /* Dark background to make nodes pop */
    overflow: hidden;
}

.cables {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.cables line {
    stroke: #334155;
    stroke-width: 3;
}

.node {
    position: absolute;
    width: 100px;
    text-align: center;
    color: #f8fafc;
    font-size: 0.8rem;
    z-index: 10;
}

.node .icon {
    background: #1e293b;
    border: 2px solid #cbd5e1;
    border-radius: 8px;
    width: 60px;
    height: 60px;
    margin: 0 auto 5px auto;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

.node .aws-icon {
    border-color: #f59e0b; /* AWS Orange */
    color: #f59e0b;
}

.node .func-icon {
    border-color: #a855f7; /* Lambda/Function Purple */
}

.node small {
    color: #94a3b8;
    font-size: 0.7rem;
}

/* The Animated Request */
.packet {
    position: absolute;
    width: 14px;
    height: 14px;
    background: #38bdf8;
    border-radius: 50%;
    box-shadow: 0 0 10px #38bdf8, 0 0 20px #38bdf8;
    z-index: 20;
    transition: top 0.6s linear, left 0.6s linear; 
}

.hidden {
    display: none;
}

/* --- Subscription Saver Workspace --- */
.sub-workspace {
    background: #ffffff;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    width: 380px;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5);
    color: #0f172a;
    overflow: hidden;
}

.sub-header {
    background: #f8fafc;
    padding: 15px 20px;
    border-bottom: 1px solid #e2e8f0;
}

.sub-header h4 {
    margin: 0;
    color: #334155;
    font-size: 1rem;
}

.sub-form {
    padding: 20px;
}

.sub-input {
    width: 100%;
    padding: 12px;
    margin-bottom: 10px;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    font-size: 0.95rem;
    color: #334155;
    background: #f8fafc;
}

.sub-input:focus {
    outline: none;
    border-color: #0284c7;
    box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.1);
}

.api-status {
    margin-top: 15px;
    padding: 10px;
    background: #dcfce7;
    color: #166534;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.85rem;
    text-align: center;
}

.sub-list {
    padding: 0;
    max-height: 250px;
    overflow-y: auto;
}

.sub-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    border-bottom: 1px solid #e2e8f0;
    transition: background 0.2s;
}

.sub-item:hover {
    background: #f8fafc;
}

.sub-item:last-child {
    border-bottom: none;
}

.sub-info {
    display: flex;
    flex-direction: column;
}

.sub-info strong {
    font-size: 0.95rem;
    color: #0f172a;
}

.sub-info small {
    color: #64748b;
    font-size: 0.8rem;
    margin-top: 3px;
}

.status-badge {
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

.status-badge.safe {
    background: #e0f2fe;
    color: #0284c7;
}

.status-badge.warning {
    background: #fef08a;
    color: #854d0e;
}

.status-badge.new {
    background: #dcfce7;
    color: #166534;
}