/* =========================================
   BlackSir Soft — Design System Styles
   Light mode (dark mode destekli)
   ========================================= */

:root {
    /* Color Palette — Light Mode */
    --color-bg: #FAF5FF;
    --color-fg: #0F172A;
    --color-primary: #FFFFFF;
    --color-primary-light: #F7F3FD;
    --color-accent: #7C3AED;
    --color-accent-hover: #2563EB;
    --color-secondary: #EC4899;
    --color-muted: #64748B;
    --color-border: #EFE7FC;

    /* Product backgrounds */
    --bg-finance: #003D7D;
    --bg-portfolio: #0063FC;

    /* Gradients */
    --gradient-1: linear-gradient(135deg, #7C3AED 0%, #2563EB 100%);
    --gradient-2: linear-gradient(135deg, #EC4899 0%, #7C3AED 100%);

    /* Typography */
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Metrics & Spacing */
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;

    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 8rem;

    /* Shadows & Effects */
    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-accent: 0 4px 15px rgba(124, 58, 237, 0.2);
    --shadow-accent-hover: 0 8px 25px rgba(37, 99, 235, 0.3);
    --transition: all 0.2s ease-in-out;
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #0B0712;
        --color-fg: #F1EBFF;
        --color-primary: #16121F;
        --color-primary-light: #1A1525;
        --color-muted: #9D94B0;
        --color-border: #2A2438;
        --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
        --shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
    }
}

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

html {
    scroll-behavior: smooth;
}

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

:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 3px;
    border-radius: 4px;
}

.skip-link {
    position: absolute;
    top: -100px;
    left: 1rem;
    background: var(--color-accent);
    color: white;
    padding: 0.75rem 1.25rem;
    border-radius: var(--border-radius-sm);
    z-index: 2000;
    font-weight: 600;
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: 1rem;
}

/* =========================================
   Typography & Utilities
   ========================================= */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

.text-gradient {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* =========================================
   Buttons
   ========================================= */
.btn-primary {
    display: inline-block;
    background: var(--color-accent);
    color: white;
    padding: 1rem 2rem;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    font-size: 1.1rem;
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-accent);
    transition: var(--transition);
}

.btn-primary:hover {
    transform: translateY(-2px);
    background: var(--color-accent-hover);
    box-shadow: var(--shadow-accent-hover);
}

.btn-primary-sm {
    display: inline-block;
    background: var(--color-fg);
    color: var(--color-primary);
    padding: 0.5rem 1.25rem;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary-sm:hover {
    background: var(--color-accent);
}

/* =========================================
   Navbar
   ========================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: color-mix(in srgb, var(--color-bg) 85%, transparent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.25rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 500;
    font-family: var(--font-heading);
}

.logo-bold {
    font-weight: 800;
    color: var(--color-accent);
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a:not(.btn-primary-sm) {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-muted);
}

.nav-links a:not(.btn-primary-sm):hover {
    color: var(--color-accent);
}

/* Hamburger toggle (checkbox hack) */
.nav-toggle {
    display: none;
}

.nav-toggle-label {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.nav-toggle-label span {
    display: block;
    width: 26px;
    height: 3px;
    background: var(--color-fg);
    border-radius: 2px;
    transition: var(--transition);
}

/* =========================================
   Hero Section
   ========================================= */
.hero {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8rem 2rem 4rem;
    overflow: hidden;
}

.hero-bg-shapes {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.55;
    animation: float 12s ease-in-out infinite;
}

.shape-1 {
    width: 380px;
    height: 380px;
    background: var(--gradient-1);
    top: -80px;
    left: -60px;
    animation-delay: 0s;
}

.shape-2 {
    width: 320px;
    height: 320px;
    background: var(--gradient-2);
    bottom: -60px;
    right: -40px;
    animation-delay: -4s;
}

.shape-3 {
    width: 260px;
    height: 260px;
    background: var(--color-secondary);
    top: 40%;
    left: 60%;
    opacity: 0.3;
    animation-delay: -8s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33%      { transform: translate(30px, -20px) scale(1.05); }
    66%      { transform: translate(-20px, 20px) scale(0.95); }
}

.hero-content {
    max-width: 800px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--color-primary-light);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: 2rem;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.25rem);
    color: var(--color-muted);
    max-width: 600px;
    margin: 0 auto 3rem;
}

/* =========================================
   Products Section
   ========================================= */
.products {
    padding: var(--space-xl) 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: 1rem;
}

.section-desc {
    color: var(--color-muted);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.product-card {
    background: var(--color-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    display: block;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-hover);
}

.card-image {
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: var(--color-primary-light);
    border-bottom: 1px solid var(--color-border);
}

.bg-finance {
    background-color: var(--bg-finance);
}

.bg-portfolio {
    background-color: var(--bg-portfolio);
}

.app-icon {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    transition: transform 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.bg-finance .app-icon {
    width: 110%;
    height: 110%;
}

.product-card:hover .app-icon {
    transform: scale(1.05);
}

.card-content {
    padding: 2.5rem;
}

.card-badge {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-fg);
}

.card-desc {
    color: var(--color-muted);
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

.card-link {
    font-weight: 600;
    color: var(--color-accent);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.product-card:hover .card-link {
    color: var(--color-accent-hover);
}

/* =========================================
   About Section
   ========================================= */
.about {
    padding: var(--space-xl) 2rem;
    background: var(--color-primary);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.about-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h2 {
    font-size: clamp(2rem, 3vw, 2.5rem);
    margin-bottom: 1.5rem;
}

.about-text p {
    color: var(--color-muted);
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

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

.stat-box {
    background: var(--color-bg);
    padding: 2rem;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--color-border);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
    letter-spacing: -0.04em;
}

.stat-label {
    color: var(--color-muted);
    font-weight: 500;
}

/* =========================================
   Contact Section
   ========================================= */
.contact {
    padding: var(--space-xl) 2rem;
    text-align: center;
}

.contact-container {
    max-width: 600px;
    margin: 0 auto;
}

.contact .section-desc {
    margin-bottom: 2rem;
}

/* =========================================
   Footer
   ========================================= */
.footer {
    padding: var(--space-lg) 2rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 2rem;
}

.footer-brand p {
    color: var(--color-muted);
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--color-muted);
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: var(--color-accent);
}

.footer-bottom {
    text-align: center;
    color: var(--color-muted);
    font-size: 0.85rem;
}

/* =========================================
   Responsive
   ========================================= */
@media (max-width: 900px) {
    .about-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-toggle-label {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: 0;
        height: 100vh;
        width: min(75vw, 320px);
        flex-direction: column;
        justify-content: center;
        gap: 1.5rem;
        background: var(--color-primary);
        border-left: 1px solid var(--color-border);
        box-shadow: -10px 0 40px rgba(0, 0, 0, 0.1);
        transform: translateX(100%);
        transition: transform 0.3s ease;
        padding: 2rem;
    }

    .nav-toggle:checked ~ .nav-links {
        transform: translateX(0);
    }

    .nav-toggle:checked ~ .nav-toggle-label span:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }

    .nav-toggle:checked ~ .nav-toggle-label span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle:checked ~ .nav-toggle-label span:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }

    .nav-links a:not(.btn-primary-sm) {
        font-size: 1.25rem;
    }

    .nav-links .btn-primary-sm {
        display: none;
    }

    .products-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }
}

/* =========================================
   Accessibility: Reduced Motion
   ========================================= */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .shape {
        animation: none;
    }
}