/* =========================================
   VARIABLES (Tailwind Palette Extraction)
========================================= */
:root {
    --slate-950: #020617;
    --slate-900: #0f172a;
    --slate-800: #1e293b;
    --slate-700: #334155;
    --slate-500: #64748b;
    --slate-400: #94a3b8;
    --slate-300: #cbd5e1;
    --slate-200: #e2e8f0;
    
    --cyan-500: #06b6d4;
    --cyan-400: #22d3ee;
    --cyan-300: #67e8f9;
    
    --indigo-500: #6366f1;
    --indigo-400: #818cf8;
    
    --purple-500: #a855f7;
    --purple-400: #c084fc;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--slate-950);
    color: var(--slate-300);
    -webkit-font-smoothing: antialiased;
    line-height: 1.5;
}

::selection {
    background-color: var(--cyan-500);
    color: #ffffff;
}

a {
    text-decoration: none;
    color: inherit;
}

strong {
    font-weight: 600;
    color: var(--slate-200);
}

em {
    font-style: italic;
    color: var(--slate-300);
}

.icon {
    width: 1.25rem;
    height: 1.25rem;
}

/* =========================================
   LAYOUT
========================================= */
.container {
    max-width: 56rem; /* 896px */
    margin: 0 auto;
    padding: 4rem 1.5rem; /* py-16 px-6 */
}

@media (min-width: 768px) {
    .container {
        padding-top: 6rem;
        padding-bottom: 6rem;
    }
}

.section {
    margin-bottom: 5rem;
}

/* =========================================
   TYPOGRAPHY BLOCKS
========================================= */
.gradient-text {
    background: linear-gradient(to right, var(--cyan-400), var(--indigo-400));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header-title {
    font-size: 3rem;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: -0.025em;
    margin-bottom: 1rem;
    line-height: 1.1;
}

@media (min-width: 768px) {
    .header-title { font-size: 3.75rem; }
}

.header-subtitle {
    font-size: 1.25rem;
    font-weight: 300;
    color: var(--slate-400);
}

@media (min-width: 768px) {
    .header-subtitle { font-size: 1.5rem; }
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #ffffff;
    border-bottom: 1px solid var(--slate-800);
    padding-bottom: 0.75rem;
    margin-bottom: 1.5rem;
}

.text-content {
    color: var(--slate-400);
    line-height: 1.625;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* =========================================
   BUTTONS
========================================= */
.btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.5rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.025em;
    transition: all 0.2s ease-in-out;
    border: 1px solid transparent;
}

.btn-cyan {
    border-color: rgba(34, 211, 238, 0.3);
    color: var(--cyan-400);
}

.btn-cyan:hover {
    background-color: rgba(34, 211, 238, 0.1);
}

.btn-slate {
    border-color: var(--slate-700);
    color: var(--slate-300);
}

.btn-slate:hover {
    background-color: var(--slate-800);
}

/* =========================================
   GRIDS
========================================= */
.grid-3 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .grid-2 { grid-template-columns: repeat(2, 1fr); }
}

/* =========================================
   COMPETENCY CARDS
========================================= */
.card {
    background-color: rgba(15, 23, 42, 0.6);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--slate-800);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
}

.card--cyan:hover {
    border-color: rgba(6, 182, 212, 0.4);
    box-shadow: 0 10px 15px -3px rgba(6, 182, 212, 0.05);
}

.card--indigo:hover {
    border-color: rgba(99, 102, 241, 0.4);
    box-shadow: 0 10px 15px -3px rgba(99, 102, 241, 0.05);
}

.card--purple:hover {
    border-color: rgba(168, 85, 247, 0.4);
    box-shadow: 0 10px 15px -3px rgba(168, 85, 247, 0.05);
}

.card-title {
    font-weight: 600;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.text-cyan { color: var(--cyan-400); }
.text-indigo { color: var(--indigo-400); }
.text-purple { color: var(--purple-400); }
.text-slate { color: var(--slate-300); }

.card-desc {
    font-size: 0.875rem;
    color: var(--slate-400);
    line-height: 1.625;
}

/* =========================================
   TIMELINE (Employment History)
========================================= */
.timeline {
    border-left: 1px solid var(--slate-800);
    padding-left: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.timeline-item {
    position: relative;
}

.timeline-dot {
    position: absolute;
    width: 0.75rem;
    height: 0.75rem;
    border-radius: 50%;
    left: -1.9rem; 
    top: 0.375rem;
}

.dot--cyan {
    background-color: var(--cyan-500);
    box-shadow: 0 0 10px rgba(34, 211, 238, 0.5);
}

.dot--slate {
    background-color: var(--slate-700);
}

.timeline-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: #ffffff;
}

.timeline-role {
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.timeline-date {
    font-weight: 400;
    color: var(--slate-500);
}

.timeline-list {
    list-style-type: disc;
    list-style-position: inside;
    font-size: 0.875rem;
    color: var(--slate-400);
    line-height: 1.625;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* =========================================
   PROJECT CARDS
========================================= */
.project-card {
    background-color: rgba(15, 23, 42, 0.4);
    padding: 1.5rem;
    border-radius: 0.75rem;
    border: 1px solid var(--slate-800);
    display: block; 
    transition: all 0.3s ease;
}

a.project-card:hover {
    transform: translateY(-2px);
    border-color: rgba(6, 182, 212, 0.4);
    box-shadow: 0 10px 15px -3px rgba(6, 182, 212, 0.05);
}

.project-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--cyan-300);
    margin-bottom: 0.25rem;
}

.tag {
    display: inline-block;
    padding: 0.125rem 0.625rem;
    border-radius: 9999px;
    background-color: var(--slate-800);
    font-size: 0.75rem;
    color: var(--slate-300);
    margin-bottom: 0.75rem;
}

.project-desc {
    font-size: 0.875rem;
    color: var(--slate-400);
    line-height: 1.625;
}

/* =========================================
   EDUCATION
========================================= */
.edu-list {
    display: flex;
    flex-direction: column;
}

.edu-item-header {
    display: flex;
    flex-direction: column;
}

@media (min-width: 768px) {
    .edu-header {
        display: flex;
        align-items: baseline;
        justify-content: space-between;
    }
}

.edu-inst {
    color: #ffffff;
    font-weight: 500;
}

.edu-date {
    color: var(--slate-500);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

@media (min-width: 768px) {
    .edu-date { margin-top: 0; }
}

.edu-desc {
    font-size: 0.875rem;
    color: var(--slate-400);
    padding-left: 1rem;
    border-left: 2px solid var(--slate-800);
    margin-top: 0.25rem;
}

.edu-spacer {
    padding-top: 1rem;
}

/* =========================================
   FOOTER
========================================= */
.footer {
    padding-top: 2rem;
    border-top: 1px solid var(--slate-800);
    text-align: center;
    font-size: 0.875rem;
    color: var(--slate-500);
}