/* Main CSS - Yash Shah Portfolio (Techie Edition) */

/* --------------------------------------------------
   VARIABLES & THEME
-------------------------------------------------- */
:root {
    /* Colors - Tech Minimal */
    --color-bg-body: #FDFDFD;
    --color-bg-card: #FFFFFF;
    --color-bg-section: #FAFAFA;

    --color-text-primary: #0F172A;
    --color-text-secondary: #475569;
    --color-text-tertiary: #94A3B8;

    --color-accent: #2563EB;
    /* Strong Tech Blue */
    --color-accent-hover: #1D4ED8;
    --color-accent-subtle: #EFF6FF;

    --color-border: #E2E8F0;
    --color-border-hover: #94A3B8;

    /* Typography */
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    /* Tech accent */

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;

    /* Shadows & Effects */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 4px 6px -1px rgba(0, 0, 0, 0.05);

    /* Decoration */
    --radius-sm: 0.25rem;
    /* Sharper */
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-full: 9999px;

    --grid-pattern: radial-gradient(#CBD5E1 1px, transparent 1px);
    --grid-size: 24px;
}

/* --------------------------------------------------
   RESET & BASE
-------------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg-body);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;

    /* Tech Background Pattern */
    background-image: var(--grid-pattern);
    background-size: var(--grid-size) var(--grid-size);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: var(--color-text-primary);
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.2s ease;
}

img {
    max-width: 100%;
    display: block;
}

ul {
    list-style: none;
}

/* --------------------------------------------------
   UTILITIES
-------------------------------------------------- */
.container {
    width: 90%;
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.text-center {
    text-align: center;
}

.text-mono {
    font-family: var(--font-mono);
    font-size: 0.9em;
}

/* Buttons - Tech Style */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--color-text-primary);
    /* Dark distinct button */
    color: white;
}

.btn-primary:hover {
    background-color: var(--color-accent);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: white;
    border-color: var(--color-border);
    color: var(--color-text-primary);
}

.btn-secondary:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn-link {
    padding: 0;
    color: var(--color-accent);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px dashed var(--color-accent);
    border-radius: 0;
}

.btn-link:hover {
    border-bottom-style: solid;
}

/* --------------------------------------------------
   COMPONENTS
-------------------------------------------------- */

/* Navigation - Floating Dock Style */
.navbar {
    position: sticky;
    top: 1rem;
    z-index: 100;
    margin-bottom: var(--spacing-lg);
}

.nav-container {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    padding: 0.75rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
}

.logo {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-link {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    font-weight: 500;
    font-family: var(--font-mono);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-accent);
}

.menu-toggle {
    display: none;
    font-size: 1.25rem;
    cursor: pointer;
}

/* Cards - Tech Panel Style */
.card {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

/* Tech Corner Accent on Hover */
.card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 20px 20px 0;
    border-color: transparent var(--color-accent) transparent transparent;
    opacity: 0;
    transition: opacity 0.2s;
}

.card:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.card:hover::after {
    opacity: 1;
}

/* --------------------------------------------------
   SECTIONS & HERO
-------------------------------------------------- */
section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    margin-bottom: 2rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

/* Hero */
.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 6rem 0;
    position: relative;
    overflow: hidden;
}

/* Bold Tech Profile Photo */
.hero-profile-container {
    position: relative;
    width: 300px;
    height: 380px;
    /* Portrait aspect ratio like Madison */
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.1);
}

/* Tech Frame Accents */
.hero-profile-container::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    width: 60px;
    height: 60px;
    border-top: 2px solid var(--color-accent);
    border-left: 2px solid var(--color-accent);
    z-index: 2;
    transition: all 0.3s;
}

.hero-profile-container::after {
    content: '';
    position: absolute;
    bottom: -10px;
    right: -10px;
    width: 60px;
    height: 60px;
    border-bottom: 2px solid var(--color-accent);
    border-right: 2px solid var(--color-accent);
    z-index: 2;
    transition: all 0.3s;
}

.hero-profile-container:hover::before,
.hero-profile-container:hover::after {
    width: 100%;
    height: 100%;
    /* Full border on hover */
    opacity: 0.5;
}

.hero-profile-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-lg);
    filter: grayscale(20%);
    /* Tech vibe */
    transition: filter 0.3s;
}

.hero-profile-img:hover {
    filter: grayscale(0%);
}

.hero-title {
    font-size: 5rem;
    /* Massive */
    font-weight: 800;
    line-height: 0.9;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: -0.05em;
    background: linear-gradient(to bottom right, #0F172A, #475569);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-role {
    font-family: var(--font-mono);
    color: var(--color-accent);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-sm);
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    font-weight: 400;
}

/* Achievements Grid */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.achievement-icon {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.achievement-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.achievement-desc {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

/* Certifications - Tech Stack Style */
details {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    margin-bottom: 0.75rem;
    border-radius: var(--radius-sm);
}

details:hover,
details[open] {
    border-color: var(--color-text-tertiary);
}

details[open] {
    border-left: 3px solid var(--color-accent);
}

summary {
    padding: 1rem;
    cursor: pointer;
    font-weight: 500;
    display: flex;
    align-items: center;
    list-style: none;
    font-family: var(--font-heading);
    position: relative;
    /* Context for custom marker */
    padding-right: 3.5rem;
    /* Space for the marker */
}

summary::-webkit-details-marker {
    display: none;
}

/* Custom Expand/Collapse Marker */
summary::after {
    content: '+';
    position: absolute;
    right: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--color-accent);
    transition: transform 0.2s ease, color 0.2s ease;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid transparent;
    border-radius: 50%;
}

details:hover summary::after {
    border-color: var(--color-accent);
    color: var(--color-accent-hover);
}

details[open] summary::after {
    transform: translateY(-50%) rotate(45deg);
    content: '+';
    /* Becomes 'x' due to rotation */
    font-size: 1.75rem;
    /* Slightly larger for X appearance */
}

.cert-header-content {
    display: flex;
    align-items: center;
    gap: 1rem;
    width: 100%;
}

.cert-logo-placeholder {
    width: 40px;
    height: 40px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    background: var(--color-bg-section);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
}

.cert-meta {
    display: flex;
    flex-direction: column;
}

.cert-title {
    font-size: 1rem;
    font-weight: 600;
}

.cert-issuer {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    margin-top: 2px;
}

.cert-content {
    padding: 0 1rem 1.5rem 1rem;
    border-top: 1px dashed var(--color-border);
    margin-top: 0;
}

.cert-details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    background: var(--color-bg-section);
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    margin: 1rem 0;
    border: 1px solid var(--color-border);
}

.cert-detail-item strong {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    display: block;
    margin-bottom: 0.25rem;
}

/* Footer */
.footer {
    margin-top: 4rem;
    padding: 2rem 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
}

/* Responsive */
@media (max-width: 768px) {
    .navbar {
        top: 0;
        margin-bottom: 2rem;
        border-radius: 0;
    }

    .nav-container {
        border-radius: 0;
        border: none;
        border-bottom: 1px solid var(--color-border);
        padding: 1rem;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 1.5rem;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-hover);
    }

    .nav-links.active {
        display: flex;
    }

    .menu-toggle {
        display: block;
    }

    .hero-title {
        font-size: 2.25rem;
    }
}