/* ==========================================================================
   Color Variables & Layout Tokens
   ========================================================================== */
:root {
    /* Fonts */
    --font-primary: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    
    /* New Premium Light Mode Palette (Deep Indigo & Warm Alabaster) */
    --bg-color: #faf9f6;         /* Warm cream base */
    --text-color: #0f1424;       /* Deep ink indigo */
    --text-muted: #525c7a;       /* Muted slate blue */
    --primary-brand: #4f46e5;    /* Vibrant electric indigo */
    --accent-hover: #d97706;     /* Warm amber */
    --border-color: #e2e5ec;     /* Crisp, subtle borders */
    --social-bg: #eceef3;          /* Soft button containers */
    --transition-speed: 0.25s;
}

body.dark-mode {
    /* New Premium Dark Mode Palette (Midnight Deep Indigo) */
    --bg-color: #1f222c;         /* Deep obsidian night */
    --text-color: #f1f3f9;       /* Off-white ice */
    --text-muted: #8c9bb4;       /* Soft sky gray */
    --primary-brand: #818cf8;    /* Luminous indigo accent */
    --accent-hover: #f59e0b;     /* Vivid gold/amber */
    --border-color: #39496d;     /* Deep framing borders */
    --social-bg: #80a0f1;  /* Raised card dark backgrounds */
    --social-hover: #d8dff0;
}

/* ==========================================================================
   General / Base Styles
   ========================================================================== */

body {
    margin: 0;
    font-family: var(--font-primary);
    line-height: 1.6;
    font-size: 1.1rem;
    color: var(--text-color);
    background-color: var(--bg-color);
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

a {
    color: var(--primary-brand);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-speed) ease;
}

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

/* ==========================================================================
   Header
   ========================================================================== */

header {
    display: flex;
    align-items: center;
    padding: 24px 60px;
    border-bottom: 1px solid var(--border-color);
    transition: border-color var(--transition-speed) ease;
}

header h1 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    white-space: nowrap;
    color: var(--text-color);
}

.header-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 40px;
}
nav {
    display: flex;
    gap: 40px; 
}

nav a {
    color: var(--text-muted);
}

nav a:hover {
    color: var(--primary-brand);
}

#theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px; /* Slightly increased targets for better accessibility */
    border-radius: 8px;
    transition: background-color var(--transition-speed);
}

#theme-toggle:hover {
    background-color: #e2e5ec;
}

#theme-toggle img {
    width: 20px;
    height: 20px;
    display: block;
}

/* ==========================================================================
   Main Content
   ========================================================================== */

main {
    max-width: 800px;
    margin: 80px auto;
    padding: 0 24px;
}

.intro {
    display: flex;
    align-items: center;
    gap: 64px;
}

@media (max-width: 768px) {
    .intro {
        flex-direction: column-reverse;
        text-align: center;
        gap: 32px;
    }
}

.profile-image img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 4px 20px rgba(15, 20, 36, 0.08); /* Adjusted to match new deep text base */
}

body.dark-mode .profile-image img {
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
}

.profile-text h1 {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.15;
    margin-top: 0;
    margin-bottom: 16px;
    color: var(--text-color);
}

/* ==========================================================================
   Footer
   ========================================================================== */

footer {
    text-align: center;
    padding: 40px 24px;
    max-width: 800px;
    margin: 120px auto 0;
    border-top: 1px solid var(--border-color);
    font-size: 0.95rem;
    color: var(--text-muted);
    transition: border-color var(--transition-speed) ease;
}

.footer-email {
    margin-bottom: 24px;
}

footer a {
    color: var(--primary-brand);
}

footer a:hover {
    color: var(--accent-hover);
}

/* Social Icons */
.social-links {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.social-links a {
    width: 44px;
    height: 44px;
    background-color: var(--social-bg);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-speed) ease, transform 0.2s ease;
}

.social-links a:hover {
    transform: translateY(-2px);
    background-color: var(--social-hover);
}

.social-links img {
    width: 20px;
    height: 20px;
}