/* Dark Mode by Default */
:root {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --card-bg: #1e1e1e;
    --accent-color: #3b82f6;
    --border-color: #333;
    --shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    --input-bg: #2a2a2a;
}

/* Light Mode Overrides */
body.light-mode {
    --bg-color: #f8f9fa;
    --text-color: #212529;
    --card-bg: #ffffff;
    --border-color: #eaeaea;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --input-bg: #ffffff;
}

body {
    font-family: 'Segoe UI', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    transition: background-color 0.3s, color 0.3s;
}

/* Top Navigation (Search & Theme Toggle) */
.top-nav {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 20px 40px;
    gap: 15px;
}

#search-input {
    padding: 10px 15px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    background: var(--input-bg);
    color: var(--text-color);
    outline: none;
    width: 250px;
    transition: 0.3s;
}

#search-input:focus {
    border-color: var(--accent-color);
}

#theme-toggle {
    padding: 10px 15px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    background: var(--input-bg);
    color: var(--text-color);
    cursor: pointer;
    font-weight: bold;
    transition: 0.3s;
}

#theme-toggle:hover {
    background: var(--border-color);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 40px 20px 80px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 50px;
}

.hero h1 {
    font-size: 3rem;
    margin: 0 0 10px 0;
    color: var(--text-color);
}

/* Grid Layout */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px 60px;
}

/* Project Cards */
.project-box {
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s, box-shadow 0.3s;
    animation: fadeUp 0.6s ease forwards;
    opacity: 0;
    transform: translateY(20px);
}

.project-box:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.project-image {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border-bottom: 1px solid var(--border-color);
}

.project-text {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-text h3 {
    margin: 0 0 10px 0;
    color: var(--text-color);
}

.project-text p {
    color: gray;
    flex-grow: 1;
    margin-bottom: 20px;
}

/* Buttons inside Cards */
.card-buttons {
    display: flex;
    gap: 10px;
}

.btn {
    flex: 1;
    text-align: center;
    padding: 10px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: bold;
    font-size: 0.9rem;
    transition: 0.2s;
}

.btn-view {
    background-color: var(--accent-color);
    color: #fff;
}

.btn-view:hover { background-color: #2563eb; }

.btn-github {
    background-color: #333;
    color: #fff;
}

.btn-github:hover { background-color: #000; }

body.light-mode .btn-github {
    background-color: #e5e5e5;
    color: #000;
}

body.light-mode .btn-github:hover {
    background-color: #d4d4d4;
}

footer {
    text-align: center;
    padding: 30px;
    color: gray;
}

@keyframes fadeUp {
    to { opacity: 1; transform: translateY(0); }
}