/* =========================================
   dataspec.dev - Portfolio Stylesheet
   Dark Mode / High-Contrast Tech Aesthetic
   ========================================= */

/* CSS Custom Properties */
:root {
    --color-primary: #00D4FF;
    --color-secondary: #7C3AED;
    --color-accent: #10B981;
    --color-dark-900: #0A0A0F;
    --color-dark-800: #12121A;
    --color-dark-700: #1A1A25;
    --color-dark-600: #252530;
    --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.15);
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Styles */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-dark-900);
    min-height: 100vh;
}

/* Gradient Text */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Hero Grid Background */
.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 50% at 50% 50%, black, transparent);
    -webkit-mask-image: radial-gradient(ellipse 80% 50% at 50% 50%, black, transparent);
}

/* Radial Gradient */
.bg-gradient-radial {
    background: radial-gradient(circle at center, var(--tw-gradient-stops));
}

/* Navigation */
.nav-link {
    position: relative;
    color: #9CA3AF;
    font-weight: 500;
    transition: var(--transition-base);
}

.nav-link:hover {
    color: var(--color-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-scrolled {
    background-color: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(37, 37, 48, 0.5);
}

/* Buttons */
.btn-primary {
    display: inline-flex;
    align-items: center;
    padding: 0.875rem 1.75rem;
    background: var(--gradient-primary);
    color: #0A0A0F;
    font-weight: 600;
    border-radius: 0.75rem;
    transition: var(--transition-base);
    text-decoration: none;
    border: none;
    cursor: pointer;
}

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

.btn-secondary {
    display: inline-flex;
    align-items: center;
    padding: 0.875rem 1.75rem;
    background-color: transparent;
    color: #E5E7EB;
    font-weight: 600;
    border-radius: 0.75rem;
    border: 1px solid var(--color-dark-600);
    transition: var(--transition-base);
    text-decoration: none;
    cursor: pointer;
}

.btn-secondary:hover {
    background-color: var(--color-dark-700);
    border-color: var(--color-primary);
}

/* Stat Cards */
.stat-card {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 1rem;
    background-color: var(--color-dark-800);
    border-radius: 0.75rem;
    border: 1px solid var(--color-dark-600);
}

/* Skill Cards */
.skill-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 1.5rem;
    background-color: var(--color-dark-700);
    border-radius: 1rem;
    border: 1px solid var(--color-dark-600);
    transition: var(--transition-base);
    opacity: 0;
    transform: translateY(20px);
}

.skill-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.skill-card.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.skill-icon {
    width: 4rem;
    height: 4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.75rem;
}

/* Case Study Cards */
.case-study-card {
    background-color: var(--color-dark-800);
    border-radius: 1rem;
    border: 1px solid var(--color-dark-600);
    overflow: hidden;
    transition: var(--transition-base);
    opacity: 0;
    transform: translateY(20px);
}

.case-study-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.case-study-card.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.tech-tag {
    display: inline-flex;
    padding: 0.375rem 0.75rem;
    background-color: var(--color-dark-600);
    color: #9CA3AF;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 0.375rem;
    font-family: 'JetBrains Mono', monospace;
}

/* Certification Cards */
.cert-card {
    background-color: var(--color-dark-700);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--color-dark-600);
    transition: var(--transition-base);
    opacity: 0;
    transform: translateY(20px);
}

.cert-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.cert-card.animate-in {
    opacity: 1;
    transform: translateY(0);
}

/* Contact Form */
.contact-form {
    background-color: var(--color-dark-800);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--color-dark-600);
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    background-color: var(--color-dark-700);
    border: 1px solid var(--color-dark-600);
    border-radius: 0.5rem;
    color: #E5E7EB;
    font-size: 1rem;
    transition: var(--transition-base);
}

.form-input::placeholder {
    color: #6B7280;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

/* Animations */
@keyframes fade-in {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fade-in 0.8s ease-out forwards;
}

.animate-fade-in-up {
    animation: fade-in-up 0.8s ease-out forwards;
}

.animation-delay-200 {
    animation-delay: 0.2s;
    opacity: 0;
}

.animation-delay-400 {
    animation-delay: 0.4s;
    opacity: 0;
}

/* Stagger animations for skill cards */
.skill-card:nth-child(1) { transition-delay: 0.05s; }
.skill-card:nth-child(2) { transition-delay: 0.1s; }
.skill-card:nth-child(3) { transition-delay: 0.15s; }
.skill-card:nth-child(4) { transition-delay: 0.2s; }
.skill-card:nth-child(5) { transition-delay: 0.25s; }
.skill-card:nth-child(6) { transition-delay: 0.3s; }
.skill-card:nth-child(7) { transition-delay: 0.35s; }
.skill-card:nth-child(8) { transition-delay: 0.4s; }
.skill-card:nth-child(9) { transition-delay: 0.45s; }
.skill-card:nth-child(10) { transition-delay: 0.5s; }

/* Responsive Adjustments */
@media (max-width: 768px) {
    .contact-form {
        padding: 1.5rem;
    }
    
    .skill-card {
        padding: 1rem;
    }
    
    .skill-icon {
        width: 3rem;
        height: 3rem;
    }
    
    .skill-icon svg {
        width: 1.5rem;
        height: 1.5rem;
    }
}

/* Focus States for Accessibility */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Selection Color */
::selection {
    background-color: rgba(0, 212, 255, 0.3);
    color: #fff;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-dark-900);
}

::-webkit-scrollbar-thumb {
    background: var(--color-dark-600);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-dark-700);
}

/* Hidden utility class */
.hidden {
    display: none !important;
}