@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;600;700;800&family=Space+Mono:ital,wght@0,400;0,700;1,400&display=swap');

:root {
    /* Corporate Dark Navy & Solid Blue Developer-Brutalist Palette */
    --bg-primary: #060a16;          /* Deepest Space Navy */
    --bg-secondary: #0c1228;        /* Midnight Navy */
    --bg-card: #111b3b;             /* Card Dark Navy */
    --border-color: #1c2a54;        /* Solid Dark Blue Border */
    --border-accent: #3b82f6;      /* Trustworthy Electric Blue */
    --text-primary: #f8fafc;        /* Off-white */
    --text-secondary: #94a3b8;      /* Cool Slate Gray */
    --text-muted: #64748b;          /* Dark Slate Gray */
    
    --shadow-offset: 4px;
    --shadow-color: var(--border-accent);
    --shadow-flat: var(--shadow-offset) var(--shadow-offset) 0px #101c3d;
    --shadow-accent: var(--shadow-offset) var(--shadow-offset) 0px var(--border-accent);
    
    --font-sans: 'Plus Jakarta Sans', sans-serif;
    --font-mono: 'Space Mono', monospace;
    --transition: all 0.2s steps(4); /* Snappy developer transitions, no heavy curves */
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #f1f5f9;
    --bg-card: #ffffff;
    --border-color: #cbd5e1;
    --border-accent: #2563eb;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --shadow-color: var(--border-accent);
    --shadow-flat: var(--shadow-offset) var(--shadow-offset) 0px #0f172a;
    --shadow-accent: var(--shadow-offset) var(--shadow-offset) 0px var(--border-accent);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
    border-left: 2px solid var(--border-color);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--border-accent);
}

/* Layout Utilities */
.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
    border-bottom: 2px solid var(--border-color);
}

/* Brutalist Header */
.brut-header {
    background-color: var(--bg-primary);
    border-bottom: 2px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo-wrapper {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.logo-terminal {
    font-family: var(--font-mono);
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.1rem;
}

.logo-tag {
    background: var(--border-color);
    border: 1px solid var(--border-color);
    color: var(--border-accent);
    padding: 2px 6px;
    font-size: 0.95rem;
    box-shadow: 2px 2px 0 var(--border-accent);
}

.logo-socials {
    display: none; /* Hide on desktop */
}

.logo-socials a {
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-decoration: none;
    transition: var(--transition);
}

.logo-socials a:hover {
    color: var(--border-accent);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 25px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    padding: 5px 0;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
}

.nav-links a:hover, .nav-links a.active {
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-accent);
}

/* Hamburger button (Desktop hidden) */
.hamburger-btn {
    display: none;
}

/* Hero Section */
.hero-wrapper {
    min-height: 80vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 60px 0;
}

.hero-status {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-primary);
    background: rgba(59, 130, 246, 0.08);
    border: 2px solid var(--border-accent);
    padding: 8px 16px;
    box-shadow: 3px 3px 0 var(--border-accent);
    margin-bottom: 25px;
    text-transform: uppercase;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

@keyframes pulse {
    0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 var(--pulse-color, rgba(16, 185, 129, 0.7));
    }
    70% {
        transform: scale(1);
        box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
    }
    100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

.hero-wrapper h1 {
    font-size: clamp(2rem, 5vw, 3.6rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -2px;
    margin-bottom: 25px;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 35px;
}

.hero-tag-item {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    padding: 8px 16px;
    box-shadow: 3px 3px 0 var(--border-color);
}

/* Brutalist Buttons */
.btn-brut {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.9rem;
    padding: 12px 24px;
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    background: transparent;
    cursor: pointer;
    text-decoration: none;
    box-shadow: var(--shadow-flat);
    transition: var(--transition);
}

.btn-brut:hover {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--border-color);
}

.btn-brut-accent {
    background-color: var(--border-accent);
    color: #ffffff;
    box-shadow: var(--shadow-accent);
}

.btn-brut-accent:hover {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--border-accent);
}

/* Brutalist Cards */
.brut-card {
    background-color: var(--bg-card);
    border: 2px solid var(--border-color);
    padding: 30px;
    box-shadow: var(--shadow-flat);
    transition: var(--transition);
    position: relative;
}

.brut-card:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--border-color);
}

.brut-card-accent {
    border-color: var(--border-accent);
    box-shadow: var(--shadow-accent);
}

.brut-card-accent:hover {
    box-shadow: 6px 6px 0 var(--border-accent);
}

/* Section Title */
.sec-kicker {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--border-accent);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.sec-kicker-dot {
    width: 10px;
    height: 10px;
    background: var(--border-accent);
    display: inline-block;
}

.sec-title {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 40px;
}

/* Metrics counter */
.metrics-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-top: -30px;
    margin-bottom: 40px;
}

.metric-card {
    padding: 20px;
    text-align: center;
}

.metric-num {
    font-family: var(--font-mono);
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--border-accent);
    line-height: 1;
    margin-bottom: 8px;
}

.metric-lbl {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-secondary);
}

/* Grid Layout for About */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 40px;
    align-items: start;
}

.skills-wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-tag {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    padding: 6px 12px;
    border: 1.5px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

.skill-tag:hover {
    color: var(--border-accent);
    border-color: var(--border-accent);
}

/* Timeline components */
.brut-timeline {
    position: relative;
    padding-left: 24px;
}

.brut-timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 5px;
    width: 2px;
    height: calc(100% - 25px);
    background: var(--border-color);
}

.brut-tl-item {
    position: relative;
    padding-bottom: 35px;
}

.brut-tl-item::before {
    content: '';
    position: absolute;
    left: -29px;
    top: 6px;
    width: 10px;
    height: 10px;
    background: var(--bg-primary);
    border: 2px solid var(--border-accent);
}

.brut-tl-date {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--border-accent);
    margin-bottom: 5px;
}

.brut-tl-title {
    font-size: 1.2rem;
    font-weight: 700;
}

.brut-tl-company {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 10px;
}

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

/* Project filters */
.filter-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 30px;
}

.filter-btn {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    padding: 8px 16px;
    background: var(--bg-secondary);
    border: 1.5px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn.active, .filter-btn:hover {
    background: var(--border-accent);
    color: white;
    border-color: var(--border-accent);
}

.proj-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 25px;
}

.proj-card {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.proj-header {
    height: 6px;
    background: var(--border-color);
    margin: -30px -30px 20px -30px;
}

.proj-card-accent .proj-header {
    background: var(--border-accent);
}

.proj-meta {
    display: flex;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    margin-bottom: 8px;
}

.proj-title {
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: 10px;
}

.proj-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    flex-grow: 1;
}

.proj-techs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 20px;
}

.proj-link {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.85rem;
    text-decoration: underline;
    color: var(--border-accent);
}

/* Pricing Planner Styling */
.planner-accordion {
    border: 2px solid var(--border-color);
    margin-bottom: 40px;
    background: var(--bg-secondary);
}

.planner-trigger {
    background: var(--bg-card);
    border-bottom: 2px solid var(--border-color);
    padding: 20px;
    font-family: var(--font-mono);
    font-weight: 700;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}

.planner-trigger:hover {
    background: rgba(59, 130, 246, 0.05);
}

.planner-body {
    padding: 30px;
    display: none; /* Controlled by JS toggle */
}

.planner-body.open {
    display: block;
}

.planner-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.planner-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--border-accent);
    text-transform: uppercase;
    margin-bottom: 8px;
    display: block;
}

.planner-control {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 14px;
    width: 100%;
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
}

.planner-control:focus {
    border-color: var(--border-accent);
}

.extra-options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
}

.planner-checkbox-card {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
}

.planner-checkbox-card input {
    width: 16px;
    height: 16px;
    accent-color: var(--border-accent);
}

.planner-checkbox-card:hover {
    border-color: var(--border-accent);
}

.planner-summary-box {
    background: var(--bg-card);
    border: 2px dashed var(--border-color);
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.planner-total {
    font-family: var(--font-mono);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--border-accent);
}

/* SMTP Contact Form Styling */
.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 40px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    padding: 20px;
}

.contact-lbl {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--border-accent);
    text-transform: uppercase;
}

.contact-val {
    font-size: 1.1rem;
    font-weight: 700;
    margin-top: 5px;
    word-break: break-all;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
}

.form-input:focus {
    border-color: var(--border-accent);
}

/* Sidebar Social */
.brut-sidebar {
    position: fixed;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 10;
}

.brut-sidebar a {
    width: 40px;
    height: 40px;
    border: 2px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    text-decoration: none;
    box-shadow: 3px 3px 0 var(--border-color);
    transition: var(--transition);
}

.brut-sidebar a:hover {
    color: white;
    background: var(--border-accent);
    border-color: var(--border-accent);
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0 var(--border-accent);
}

/* Back to top floating button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 45px;
    height: 45px;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 99;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    box-shadow: 3px 3px 0 var(--border-color);
    cursor: pointer;
    color: var(--text-primary);
    font-size: 1.1rem;
    transition: var(--transition);
}

.back-to-top:hover {
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0 var(--border-color);
}

/* Footer Styling */
footer {
    padding: 30px 0;
    background: var(--bg-secondary);
    border-top: 2px solid var(--border-color);
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Theme Toggle Button */
.theme-btn {
    background: none;
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 2px 2px 0 var(--border-color);
    transition: var(--transition);
}

.theme-btn:hover {
    border-color: var(--border-accent);
    color: var(--border-accent);
    transform: translate(1px, 1px);
    box-shadow: 1px 1px 0 var(--border-accent);
}

/* Responsive Styles */
@media (max-width: 992px) {
    .about-grid, .contact-layout {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    .brut-sidebar {
        display: none; /* Hide desktop sidebar on mobile */
    }
}

@media (max-width: 768px) {
    .logo-socials {
        display: flex;
        gap: 12px;
        margin-top: 4px;
    }
    
    .logo-socials a {
        display: inline-flex;
        align-items: center;
        gap: 4px;
        color: var(--text-secondary);
        font-size: 0.85rem;
    }

    .hamburger-btn {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    /* Mobil Menü: Tidy dropdown penceresi, tüm ekranı kaplamaz */
    .nav-links {
        display: none;
        flex-direction: column;
        gap: 0;
        position: absolute;
        top: 70px;
        right: 20px;
        width: 220px;
        background: var(--bg-card);
        border: 2px solid var(--border-color);
        box-shadow: var(--shadow-accent);
        z-index: 99;
        padding: 10px 0;
    }

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

    .nav-links a {
        width: 100%;
        padding: 12px 20px;
        border-bottom: 1px solid rgba(28, 42, 84, 0.5);
    }
    
    .nav-links a:last-of-type {
        border-bottom: none;
    }

    .nav-links .theme-btn {
        width: calc(100% - 40px);
        margin: 10px 20px;
        justify-content: center;
    }

    .hero-wrapper {
        min-height: auto;
        padding: 60px 0 30px 0;
    }

    .hero-wrapper h1 {
        font-size: clamp(1.6rem, 7vw, 2.2rem) !important;
        letter-spacing: -1px;
    }

    .hero-tags {
        gap: 8px !important;
    }

    .hero-tag-item {
        font-size: 0.7rem !important;
        padding: 6px 12px !important;
        box-shadow: 2px 2px 0 var(--border-color) !important;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
    }
}