/* ----------------------------------------------------------------
   MBA Portfolio - Global Styles (style.css)
   ---------------------------------------------------------------- */

/* --- Variables and Reset --- */
:root {
    /* Professional Navy/Corporate Theme */
    --color-primary: #0a192f;        /* Deep Navy Background */
    --color-secondary: #007bff;      /* Corporate Blue Accent */
    --color-text-light: #ccd6f6;     /* Light Text for Dark Mode */
    --color-text-dark: #1f2937;      /* Dark Text for Light Mode */
    --color-card-bg: #112240;        /* Card Background */
    --color-hover-accent: #64ffda;   /* Bright Teal/Aqua Accent */
    --color-shadow: rgba(0, 0, 0, 0.2);
    --transition-speed: 0.3s;
}

/* Light Mode Override (Set by script.js) */
body.light-mode {
    --color-primary: #f0f4f8;        /* Light Gray/White Background */
    --color-secondary: #0056b3;
    --color-text-light: #1f2937;
    --color-text-dark: #1f2937;
    --color-card-bg: #ffffff;
    --color-shadow: rgba(0, 0, 0, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif; /* Professional Typography */
    background-color: var(--color-primary);
    color: var(--color-text-light);
    line-height: 1.6;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

/* --- Utility Classes --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 80px 0;
    min-height: 80vh;
}

h1, h2, h3 {
    margin-bottom: 20px;
    font-weight: 700;
    line-height: 1.2;
}

h2 {
    font-size: 2.5rem;
    color: var(--color-hover-accent);
    text-align: center;
    margin-bottom: 60px;
}

a {
    color: var(--color-hover-accent);
    text-decoration: none;
    transition: color var(--transition-speed);
}

a:hover {
    color: var(--color-secondary);
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 12px 25px;
    border: 2px solid var(--color-secondary);
    color: var(--color-secondary);
    font-weight: 600;
    text-transform: uppercase;
    border-radius: 8px;
    transition: all var(--transition-speed);
    margin: 10px 10px 10px 0;
}

.btn-primary {
    background-color: var(--color-secondary);
    color: var(--color-primary);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px var(--color-shadow);
}

.btn-primary:hover {
    background-color: var(--color-hover-accent);
    color: var(--color-primary);
    border-color: var(--color-hover-accent);
}

/* --- Header and Navigation (Reusable Component) --- */
header {
    background-color: var(--color-primary);
    padding: 15px 0;
    box-shadow: 0 2px 4px var(--color-shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--color-hover-accent);
}

nav ul {
    list-style: none;
    display: flex;
}

nav ul li {
    margin-left: 25px;
}

nav ul a {
    color: var(--color-text-light);
    font-weight: 500;
    padding: 5px 0;
    position: relative;
}

nav ul a:after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    display: block;
    margin-top: 5px;
    right: 0;
    background: var(--color-hover-accent);
    transition: width var(--transition-speed) ease;
}

nav ul a:hover:after {
    width: 100%;
    left: 0;
    background: var(--color-hover-accent);
}

/* Hamburger Menu for Mobile */
.menu-toggle {
    display: none;
    cursor: pointer;
    font-size: 1.5rem;
}

/* --- Hero Section (index.html) --- */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    text-align: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-card-bg) 100%);
}

.hero h1 {
    font-size: 3.5rem;
    color: var(--color-hover-accent);
    margin-top: 0;
}

.hero h2 {
    font-size: 2rem;
    color: var(--color-secondary);
    margin-bottom: 40px;
}

/* --- Card Layouts (General) --- */
.grid-2, .grid-3 {
    display: grid;
    gap: 30px;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.card {
    background-color: var(--color-card-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 10px var(--color-shadow);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--color-shadow);
}

/* --- About Me Page Specific --- */
.skill-list {
    list-style: none;
    padding: 0;
}

.skill-list li {
    background-color: var(--color-secondary);
    color: var(--color-primary);
    display: inline-block;
    padding: 6px 15px;
    margin: 5px;
    border-radius: 5px;
    font-weight: 600;
    font-size: 0.9rem;
}

.education-item {
    border-left: 3px solid var(--color-secondary);
    padding-left: 20px;
    margin-bottom: 25px;
}

.education-item h4 {
    color: var(--color-hover-accent);
}

/* --- Projects Page Specific --- */
.project-card h3 {
    color: var(--color-secondary);
}

.project-card .tools-used {
    margin-top: 10px;
    font-style: italic;
    color: #94a3b8; /* Subtle text */
}

/* --- Resume Page Specific --- */
.resume-section {
    text-align: center;
    padding: 50px 0;
}

.pdf-preview {
    width: 100%;
    height: 800px;
    border: 1px solid var(--color-card-bg);
    border-radius: 8px;
    margin-top: 30px;
}

/* --- Notes Page Specific --- */
#notes-container {
    padding-top: 30px;
}

.note-card {
    cursor: pointer;
    border-left: 5px solid var(--color-secondary);
}

.note-card p {
    margin-top: 10px;
    font-size: 0.95rem;
    color: #a8b2d1;
}

/* --- Contact & Upload Section --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info div {
    margin-bottom: 25px;
}

.contact-info a {
    font-size: 1.1rem;
}

form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

form input[type="text"],
form input[type="email"],
form textarea {
    width: 100%;
    padding: 12px;
    margin-bottom: 20px;
    border: 1px solid var(--color-card-bg);
    border-radius: 5px;
    background-color: var(--color-card-bg);
    color: var(--color-text-light);
}

form textarea {
    min-height: 150px;
}

.google-form-embed {
    border: none;
    width: 100%;
    min-height: 600px;
    border-radius: 8px;
    box-shadow: 0 4px 10px var(--color-shadow);
}

/* --- Social Links (Footer/Sidebar) --- */
.social-links {
    list-style: none;
    display: flex;
    justify-content: center;
    padding: 20px 0;
}

.social-links li {
    margin: 0 15px;
}

.social-links a {
    font-size: 1.5rem;
    color: var(--color-text-light);
}

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

/* --- Footer (Reusable Component) --- */
footer {
    padding: 20px 0;
    text-align: center;
    border-top: 1px solid var(--color-card-bg);
    font-size: 0.9rem;
    color: #8892b0;
}

/* --- Dark Mode Toggle --- */
.theme-switch-wrapper {
    display: flex;
    align-items: center;
    position: relative;
    margin-left: 20px;
}

.theme-switch-wrapper em {
    margin-right: 10px;
}

.theme-switch {
    display: inline-block;
    height: 24px;
    position: relative;
    width: 44px;
}

.theme-switch input {
    display: none;
}

.slider {
    background-color: var(--color-secondary);
    bottom: 0;
    cursor: pointer;
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
    transition: var(--transition-speed);
}

.slider:before {
    background-color: #fff;
    bottom: 4px;
    content: "";
    height: 16px;
    left: 4px;
    position: absolute;
    transition: var(--transition-speed);
    width: 16px;
}

input:checked + .slider {
    background-color: var(--color-hover-accent);
}

input:checked + .slider:before {
    transform: translateX(20px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

/* --- Media Queries (Responsiveness) --- */
@media (max-width: 900px) {
    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
    }
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .hero h1 {
        font-size: 2.5rem;
    }
    .hero h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 768px) {
    /* Mobile Navigation */
    nav ul {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 60px; /* Adjust based on header height */
        left: 0;
        width: 100%;
        background-color: var(--color-primary);
        box-shadow: 0 4px 8px var(--color-shadow);
        padding: 10px 20px;
    }
    nav ul.active {
        display: flex;
    }
    nav ul li {
        margin: 10px 0;
    }
    .menu-toggle {
        display: block;
    }
    header .container {
        padding: 0 20px;
    }
    .theme-switch-wrapper {
        position: static;
    }
}