:root {
    --bg-color: #f3f4f6;
    --card-bg: #ffffff;
    --secondary-bg: #f8f9fa;
    --text-color: #1e293b;
    --muted-text: #64748b;
    --border-color: #e2e8f0;
    --link-color: #2563eb;
    --shadow-color: rgba(0, 0, 0, 0.08);
}

body.dark-mode {
    --bg-color: #0d1117;
    --card-bg: #161b22;
    --secondary-bg: #21262d;
    --text-color: #e6edf3;
    --muted-text: #8b949e;
    --border-color: #30363d;
    --link-color: #58a6ff;
    --shadow-color: rgba(0, 0, 0, 0.35);
}

/* ===== GLOBAL RESET ===== */
html,
body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    width: 100%;
    background: var(--bg-color) !important;
}

/* ===== BODY ===== */
body {
    font-family: Arial, sans-serif;
    color: var(--text-color);
    transition: background-color 0.25s ease, color 0.25s ease;
    padding: 24px 0;
}

/* ===== BOOTSTRAP OVERRIDES ===== */
.container {
    background: transparent !important;
}

.text-muted,
p.text-muted,
header p.text-muted {
    color: var(--muted-text) !important;
}

p,
span,
li,
ul,
section,
header,
h2,
h4 {
    color: var(--text-color);
}

/* ===== MAIN CARD ===== */
.portfolio-container {
    max-width: 1000px;
    margin: 30px auto;
    padding: 32px;
    background: var(--card-bg);
    border-radius: 18px;
    box-shadow: 0 8px 25px var(--shadow-color);
    transition: all 0.25s ease;
}

/* ===== LINKS ===== */
a {
    color: var(--link-color);
}

.social-links a {
    text-decoration: none;
    font-weight: 500;
}

.social-links a:hover {
    opacity: 0.85;
}

/* ===== PROJECTS ===== */
.project-list li {
    margin-bottom: 16px;
    line-height: 1.8;
}

/* ===== HIGHLIGHTS ===== */
.highlight {
    font-weight: 500;
    color: var(--text-color);
}

/* ===== TECH GRID ===== */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
    gap: 24px;
    margin-top: 20px;
}

.tech-item {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 12px;
    border-radius: 12px;
    transition: 0.25s ease;
    background: var(--secondary-bg);
}

.tech-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px var(--shadow-color);
    background: var(--card-bg);
}

.tech-item img {
    width: 60px;
    height: 60px;
    object-fit: contain;
}

/* ===== HEADINGS ===== */
h2,
h4 {
    font-weight: 700;
}

/* ===== TOGGLE BUTTON ===== */
.theme-toggle-btn {
    border: 1px solid var(--border-color);
    background: var(--secondary-bg);
    color: var(--text-color);
    width: 58px;
    height: 58px;
    border-radius: 14px;
    font-size: 1.35rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s ease;
}

.theme-toggle-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px var(--shadow-color);
}

body.dark-mode .theme-toggle-btn {
    background: #30363d;
    border-color: #484f58;
}

/* ===== MOBILE ===== */
@media (max-width: 768px) {
    body {
        padding: 12px 0;
    }

    .portfolio-container {
        margin: 14px auto;
        padding: 20px;
        border-radius: 14px;
    }

    h2 {
        font-size: 1.8rem;
    }

    h4 {
        font-size: 1.2rem;
    }

    .social-links {
        gap: 12px !important;
    }

    .tech-grid {
        grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
        gap: 16px;
    }

    .tech-item img,
    .tech-item {
        width: 50px;
        height: 50px;
    }
}