/* ========================================
   ROOT VARIABLES & THEMES
   ======================================== */
:root {
    /* Light Theme */
    --bg-primary: #f0f2f5;
    --bg-card: #ffffff;
    --bg-section: #f8f9fa;
    --bg-hover: #f0f0f5;
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --text-muted: #8888aa;
    --accent-color: #6c5ce7;
    --accent-hover: #5a4bd1;
    --accent-light: #a29bfe;
    --border-color: #e0e0e8;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 8px 30px rgba(108, 92, 231, 0.12);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    /* Dark Theme */
    --bg-primary: #0a0a0f;
    --bg-card: #14141f;
    --bg-section: #1a1a2e;
    --bg-hover: #1f1f35;
    --text-primary: #e8e8f0;
    --text-secondary: #a0a0b8;
    --text-muted: #6a6a8a;
    --accent-color: #a29bfe;
    --accent-hover: #b8b2ff;
    --accent-light: #6c5ce7;
    --border-color: #2a2a40;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 8px 30px rgba(162, 155, 254, 0.08);
}

/* ========================================
   BASE RESET
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    padding: 24px;
    min-height: 100vh;
    transition: var(--transition);
}

/* ========================================
   THEME TOGGLE
   ======================================== */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 10px 18px;
    border-radius: 50px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: var(--shadow);
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.theme-toggle:hover {
    transform: scale(1.04);
    border-color: var(--accent-color);
    box-shadow: var(--shadow-hover);
}

.theme-toggle .icon {
    font-size: 1.2rem;
}

/* ========================================
   CONTAINER & LAYOUT
   ======================================== */
.container {
    max-width: 1000px;
    margin: 0 auto;
    background: var(--bg-card);
    padding: 48px 56px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

/* ========================================
   HEADER
   ======================================== */
.header {
    text-align: center;
    padding-bottom: 28px;
    margin-bottom: 32px;
    border-bottom: 2px solid var(--border-color);
}

.header h1 {
    font-size: 2.8rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

.header .subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 16px;
}

.contact {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
}

.contact span {
    background: var(--bg-section);
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.contact span:hover {
    border-color: var(--accent-color);
    background: var(--bg-hover);
}

/* ========================================
   SECTIONS
   ======================================== */
.section {
    margin: 36px 0;
}

.section-title {
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 10px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: -0.3px;
}

.section-title::before {
    content: "▸";
    color: var(--accent-color);
    font-weight: 700;
}

/* ========================================
   OBJECTIVE
   ======================================== */
.objective {
    background: var(--bg-section);
    padding: 20px 24px;
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--accent-color);
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 28px;
    transition: var(--transition);
}

.objective strong {
    color: var(--text-primary);
}

/* ========================================
   EDUCATION GRID
   ======================================== */
.edu-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.edu-item {
    background: var(--bg-section);
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--accent-color);
    transition: var(--transition);
}

.edu-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-hover);
}

.edu-item h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
}

.edu-item .institute {
    color: var(--accent-color);
    font-weight: 500;
    font-size: 0.9rem;
}

.edu-item .year {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ========================================
   SKILLS
   ======================================== */
.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.skill-category {
    background: var(--bg-section);
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.skill-category:hover {
    box-shadow: var(--shadow-hover);
}

.skill-category h4 {
    color: var(--accent-color);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: 0.3px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.skill-tags span {
    background: var(--accent-color);
    color: var(--bg-card);
    padding: 3px 14px;
    border-radius: 14px;
    font-size: 0.78rem;
    font-weight: 500;
    transition: var(--transition);
}

.skill-tags span:hover {
    transform: scale(1.05);
    box-shadow: 0 2px 12px rgba(108, 92, 231, 0.3);
}

/* ========================================
   EXPERIENCE
   ======================================== */
.exp-item {
    background: var(--bg-section);
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 14px;
    border-left: 3px solid var(--accent-color);
    transition: var(--transition);
}

.exp-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-hover);
}

.exp-item h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
}

.exp-item .org {
    color: var(--accent-color);
    font-weight: 500;
}

.exp-item .duration {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.exp-item ul {
    list-style: none;
    padding-left: 0;
    margin-top: 4px;
}

.exp-item ul li {
    padding: 1px 0 1px 22px;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.exp-item ul li::before {
    content: "▸";
    color: var(--accent-color);
    position: absolute;
    left: 0;
    font-weight: 700;
}

/* ========================================
   ACHIEVEMENTS
   ======================================== */
.achieve-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.achieve-item {
    background: var(--bg-section);
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.achieve-item:hover {
    box-shadow: var(--shadow-hover);
}

.achieve-item h4 {
    color: var(--accent-color);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.achieve-item ul {
    list-style: none;
    padding-left: 0;
}

.achieve-item ul li {
    padding: 2px 0 2px 22px;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.achieve-item ul li::before {
    content: "▸";
    color: var(--accent-color);
    position: absolute;
    left: 0;
    font-weight: 700;
}

/* ========================================
   HOBBIES
   ======================================== */
.hobbies {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 8px;
}

.hobbies span {
    background: var(--bg-section);
    padding: 6px 18px;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.hobbies span:hover {
    border-color: var(--accent-color);
    background: var(--bg-hover);
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
    body { padding: 12px; }
    .container { padding: 24px; }
    .header h1 { font-size: 2rem; }
    .edu-grid { grid-template-columns: 1fr; }
    .skills-grid { grid-template-columns: 1fr; }
    .achieve-grid { grid-template-columns: 1fr; }
    .contact { flex-direction: column; align-items: center; }
    .theme-toggle { top: 12px; right: 12px; padding: 6px 14px; font-size: 0.8rem; }
    .theme-toggle span:not(.icon) { display: none; }
}

@media (max-width: 480px) {
    .container { padding: 16px; }
    .header h1 { font-size: 1.6rem; }
    .exp-item { padding: 12px 16px; }
    .edu-item { padding: 12px 16px; }
}