:root {
    --primary-color: #059669; /* emerald-600 */
    --primary-color-hover: #047857; /* emerald-700 */
    
    --text-color-normal: #334155; /* slate-700 */
    --text-color-light: #475569; /* slate-600 */
    --text-color-headings: #0f172a; /* slate-900 */
    
    --background-color: #f8fafc; /* slate-50 */
    --card-background: #ffffff;
    --card-border: #e2e8f0; /* slate-200 */
    
    --profile-bg-block: #334155; /* slate-700 */

    /* New variables for light mode project cards */
    --project-card-bg: #ffffff;
    --project-card-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --project-card-shadow-hover: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --project-card-heading: var(--text-color-headings);
    --project-card-text: var(--text-color-light);
    --project-card-tag-bg: #dcfce7; /* emerald-100 */
    --project-card-tag-text: #065f46; /* emerald-800 */
}

.dark {
    --primary-color: #34d399; /* emerald-400 */
    --primary-color-hover: #6ee7b7; /* emerald-300 */

    --text-color-normal: #cbd5e1; /* slate-300 */
    --text-color-light: #94a3b8; /* slate-400 */
    --text-color-headings: #ffffff;

    --background-color: #000000; /* black */
    --card-background: #1e293b; /* slate-800 */
    --card-border: #334155; /* slate-700 */
    
    --profile-bg-block: #1e293b; /* slate-800 */

    /* New variables for dark mode project cards */
    --project-card-bg: linear-gradient(145deg, #1e293b, #0f172a);
    --project-card-shadow: 0 10px 20px rgba(0, 0, 0, 0.2), 0 6px 6px rgba(0, 0, 0, 0.2);
    --project-card-shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
    --project-card-heading: var(--text-color-headings);
    --project-card-text: var(--text-color-light);
    --project-card-tag-bg: #334155; /* slate-700 */
    --project-card-tag-text: #cbd5e1; /* slate-300 */
}

/* --- Global Styles --- */
body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color-normal);
}

/* --- Reusable Component Styles (using variables) --- */

.nav-link {
    position: relative;
    color: var(--text-color-light);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--primary-color);
    transition: width 0.3s;
}

.nav-link:hover::after {
    width: 100%;
}

.profile-image-background {
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: var(--profile-bg-block);
    border-radius: 0.75rem;
    top: 1rem;
    left: 1rem;
}

.social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    font-size: 1.25rem;
    color: white;
    text-decoration: none;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.social-icon:hover {
    transform: translateY(-4px) scale(1.1);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.bg-youtube    { background-color: #FF0000; }
.bg-github     { background-color: #181717; }
.bg-linkedin   { background-color: #0A66C2; }
.bg-instagram  { background: radial-gradient(circle at 30% 107%, #fdf497 0%, #fdf497 5%, #fd5949 45%, #d6249f 60%, #285AEB 90%); }


/* --- Updated Project Card styles --- */
.premium-project-card {
    background: var(--project-card-bg);
    border-radius: 1rem;
    box-shadow: var(--project-card-shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid var(--card-border);
}

.premium-project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--project-card-shadow-hover);
}

.premium-project-card h3 {
    color: var(--project-card-heading);
}
.premium-project-card p {
    color: var(--project-card-text);
}
.premium-project-card .tech-tag {
    display: inline-block;
    background-color: var(--project-card-tag-bg);
    color: var(--project-card-tag-text);
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.25rem 0.75rem;
    /* This ensures the tags are fully rounded "pills" */
    border-radius: 9999px;
}
.premium-project-card .font-semibold {
    color: var(--primary-color);
}


/* --- Other Component Styles --- */

.header-button {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    border: 1px solid var(--card-border);
    border-radius: 0.5rem;
    font-weight: 500;
    transition: all 0.2s ease-in-out;
}

.header-button:hover {
    background-color: #f1f5f9;
    border-color: #94a3b8;
}

.dark .header-button:hover {
    background-color: var(--card-background);
    border-color: var(--text-color-light);
}

.header-button-primary {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 600;
    background-color: var(--primary-color);
    color: white;
    transition: all 0.2s ease-in-out;
}

.dark .header-button-primary {
    color: #0f172a; /* slate-900 */
}

.header-button-primary:hover {
    background-color: var(--primary-color-hover);
    transform: translateY(-2px);
}

.scroll-to-top {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
}

.dark .scroll-to-top {
    color: #0f172a; /* slate-900 */
}

.scroll-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-to-top:hover {
    background-color: var(--primary-color-hover);
}

.signature-font {
    font-family: "Meddon", cursive;
    font-weight: 700;
}