/* ==========================================================================
   Base Variables & Theme Definitions (Tech & Cloud Focus)
   ========================================================================== */

:root {
    --color-bg: #FFFFFF;
    --color-text: #2B2B2B; /* primary from resume */
    --color-accent: #1E3A8A; /* accent from resume */
    --color-accent-hover: #0F4C81; /* lighttext from resume */
    --color-bg-contrast: #F1F5F9; 
    
    /* Added Noto Sans to match the resume font */
    --font-ui: "Noto Sans", "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-heading: "Noto Sans", "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; 
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #0F172A; 
        --color-text: #F8FAFC; 
        --color-accent: #38BDF8; 
        --color-accent-hover: #7DD3FC; 
        --color-bg-contrast: #1E293B; 
    }
}

[data-theme="light"] {
    --color-bg: #FFFFFF;
    --color-text: #2B2B2B; 
    --color-accent: #1E3A8A; 
    --color-accent-hover: #0F4C81; 
    --color-bg-contrast: #F1F5F9;
}

[data-theme="dark"] {
    --color-bg: #0F172A;
    --color-text: #F8FAFC; 
    --color-accent: #38BDF8; 
    --color-accent-hover: #7DD3FC; 
    --color-bg-contrast: #1E293B;
}

/* ==========================================================================
   Global Resets & Typography
   ========================================================================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-padding-top: 110px; 
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-ui);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
    font-family: var(--font-heading);
    line-height: 1.2;
    margin-bottom: 1rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2rem); }
h3 { font-size: 1.25rem; }

p { margin-bottom: 1.5rem; max-width: 70ch; }

a {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 4px;
    transition: color 0.2s ease;
}

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

/* ==========================================================================
   Layout & Structure
   ========================================================================== */
.container {
    width: 90%;
    max-width: 1000px;
    margin: 0 auto;
}

.section { padding: 4rem 0; }

.bg-contrast {
    background-color: var(--color-bg-contrast);
    border-radius: 8px; 
    padding: 3rem 2rem;
    margin: 2rem auto;
    width: 100%;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
    padding: 2rem 0;
    border-bottom: 1px solid var(--color-bg-contrast);
    position: sticky;
    top: 0;
    background-color: var(--color-bg);
    z-index: 100;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05); 
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.branding h1 { margin-bottom: 0.2rem; }
.branding p { 
    margin-bottom: 0; 
    font-size: 1.1rem; 
    color: var(--color-accent); 
    font-weight: 500;
}

.primary-navigation ul {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

.primary-navigation a {
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
}

.primary-navigation a:hover {
    border-bottom-color: var(--color-accent);
}

/* ==========================================================================
   Buttons & UI Elements
   ========================================================================== */
.button {
    display: inline-block;
    background-color: var(--color-accent);
    color: #FFFFFF !important; 
    border: 2px solid var(--color-accent);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-family: var(--font-ui);
    font-weight: 600;
    cursor: pointer;
    border-radius: 6px; 
    text-decoration: none;
    transition: all 0.2s ease;
}

.button:hover, .button:focus {
    background-color: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    transform: translateY(-1px); 
}

.button-outline {
    background-color: transparent;
    color: var(--color-accent) !important;
}

.button-outline:hover {
    background-color: var(--color-accent);
    color: #FFFFFF !important;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    background: transparent;
    border: 1px solid var(--color-bg-contrast);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--color-text);
    transition: background-color 0.2s;
}

.theme-toggle:hover { background-color: var(--color-bg-contrast); }
.theme-toggle svg { width: 20px; height: 20px; }

[data-theme="light"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: none; }
@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) .icon-sun { display: none; }
}
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .icon-moon { display: none; }
}

/* ==========================================================================
   Thrilling Sections: Timeline & Grids
   ========================================================================== */
.keyword-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.keyword-list li {
    background-color: var(--color-bg-contrast);
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    font-size: 0.9rem;
    font-family: var(--font-mono); 
    border: 1px solid rgba(0,0,0,0.05);
}

.timeline {
    border-left: 3px solid var(--color-bg);
    padding-left: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-top: 2rem;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: -3px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--color-accent);
    opacity: 0.3;
}

.timeline-item { position: relative; }

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2.4rem; 
    top: 0.3rem;
    width: 14px;
    height: 14px;
    background: var(--color-bg-contrast);
    border: 3px solid var(--color-accent);
    border-radius: 50%;
    z-index: 2;
}

.timeline-content h3 { 
    margin-bottom: 0.2rem; 
    color: var(--color-text); 
}

.timeline-content h4 { 
    font-size: 1rem; 
    font-weight: 500; 
    margin-bottom: 0.8rem; 
}

.timeline-content h4 a { text-decoration: none; }
.timeline-content h4 span { 
    font-size: 0.9rem; 
    font-weight: normal;
    opacity: 0.7; 
    margin-left: 0.5rem; 
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.cert-card {
    background: var(--color-bg-contrast);
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--color-accent);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cert-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
}

.cert-card h3 { color: var(--color-accent); font-size: 1.1rem; margin-bottom: 0.5rem; }
.cert-card p { margin-bottom: 0; font-size: 0.95rem; }

/* ==========================================================================
   Modals
   ========================================================================== */
.modal {
    border: none;
    border-radius: 12px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    background-color: var(--color-bg);
    color: var(--color-text);
    max-width: 600px;
    width: 90%;
    margin: auto;
    padding: 0;
}

.modal::backdrop {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(4px);
}

.modal-content { display: flex; flex-direction: column; }
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-bg-contrast);
}

.modal-header h2 { margin: 0; }

.close-button {
    background: transparent;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--color-text);
    line-height: 1;
}

.modal-body { padding: 1.5rem; }

.form-group { margin-bottom: 1.25rem; }
.form-row { display: flex; gap: 1rem; flex-wrap: wrap; }
.name-group { flex: 1; min-width: 200px; }

label { display: block; margin-bottom: 0.5rem; font-weight: 500; }

input[type="text"], input[type="email"], textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #CBD5E1;
    border-radius: 6px;
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-ui);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.2);
}

.honeypot-field { display: none; }

/* ==========================================================================
   Utilities & Mobile Adjustments
   ========================================================================== */

.skip-link {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%) translateY(-100%);
    background: var(--color-accent);
    color: white;
    padding: 8px 16px;
    z-index: 1000;
    border-bottom-left-radius: 8px;
    border-bottom-right-radius: 8px;
    transition: transform 0.3s ease;
}

.skip-link:focus { transform: translateX(-50%) translateY(0); }

/* About Section Profile Image Fix */
.about-section {
    display: flex;
    flex-direction: column-reverse; 
    gap: 3rem;
    align-items: center;
}

@media (min-width: 768px) {
    .about-section {
        flex-direction: row; 
        align-items: flex-start; 
        justify-content: space-between;
    }
    .about-content { 
        flex: 1; 
        padding-right: 2rem; 
    }
    .about-image { 
        flex-shrink: 0; 
        margin: 0;
    }
}

.profile-photo {
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--color-bg-contrast);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.site-footer {
    border-top: 1px solid var(--color-bg-contrast);
    padding: 2rem 0;
    margin-top: 4rem;
}

.footer-container {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.9rem;
}

.profile-links {
    list-style: none;
    display: flex;
    gap: 1rem;
}

.mobile-menu-toggle { display: none; }

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
        background: transparent;
        border: 1px solid var(--color-text);
        color: var(--color-text);
        padding: 0.5rem 1rem;
        border-radius: 4px;
        cursor: pointer;
    }

    .primary-navigation { display: none; width: 100%; }
    .primary-navigation[aria-expanded="true"] { display: block; padding-top: 1rem; }
    .primary-navigation ul { flex-direction: column; gap: 0; }
    .primary-navigation a {
        display: block;
        padding: 1rem 0;
        border-bottom: 1px solid var(--color-bg-contrast);
    }
}

/* ==========================================================================
   Education & Languages Styling
   ========================================================================== */
.about-extras {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-bg-contrast);
}

.extra-block h3 {
    font-size: 1.1rem;
    color: var(--color-accent);
    margin-bottom: 1rem;
}

.minimal-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.minimal-list li {
    display: flex;
    flex-direction: column;
    font-size: 0.95rem;
}

.minimal-list li span {
    font-size: 0.85rem;
    opacity: 0.8;
}

/* ==========================================================================
   Timeline Summary Indicator (Sleek Version)
   ========================================================================== */
.summary-item::before {
    width: 12px;
    height: 12px;
    left: -2.35rem; 
    top: 0.4rem;
    background: var(--color-bg) !important;
    border: 3px solid var(--color-accent) !important; 
}

.summary-item .timeline-content {
    opacity: 0.8; 
}

.summary-item p {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.timeline-link {
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    border-bottom: 1px solid transparent;
}

.timeline-link:hover {
    border-bottom-color: var(--color-accent);
}