/* -------------------------------------------------------------
 * Haseeb Jalil - Developer Portfolio Stylesheet
 * Custom CSS Custom Properties, Glassmorphism, macOS Windows & Glows
 * ------------------------------------------------------------- */

/* Define CSS Variables for Theme switching */
:root {
    /* Font Fam */
    --font-sans: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Theme colors: LIGHT MODE (Default fallback if html has no dark class) */
    --bg-primary: #F5F5F7;
    --bg-secondary: #FFFFFF;
    --text-primary: #1D1D1F;
    --text-secondary: #515154;
    --text-muted: #86868B;
    --border-color: rgba(0, 0, 0, 0.08);
    
    /* Glassmorphism details */
    --glass-bg: rgba(255, 255, 255, 0.45);
    --glass-bg-hover: rgba(255, 255, 255, 0.65);
    --glass-border: rgba(0, 0, 0, 0.08);
    --glass-border-hover: rgba(168, 85, 247, 0.35);
    --nav-bg: rgba(245, 245, 247, 0.7);

    /* macOS window aesthetics */
    --mac-close: #FF5F56;
    --mac-minimize: #FFBD2E;
    --mac-maximize: #27C93F;

    /* Custom glows setup */
    --glow-opacity: 0.12;
    --text-glow-val: rgba(168, 85, 247, 0.2);
}

/* Dark mode theme override */
html.dark {
    --bg-primary: #000000;
    --bg-secondary: #0D0D0E;
    --text-primary: #FFFFFF;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    --border-color: rgba(255, 255, 255, 0.08);
    
    --glass-bg: rgba(29, 29, 31, 0.5);
    --glass-bg-hover: rgba(29, 29, 31, 0.75);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-border-hover: rgba(168, 85, 247, 0.4);
    --nav-bg: rgba(0, 0, 0, 0.65);

    --glow-opacity: 0.25;
    --text-glow-val: rgba(168, 85, 247, 0.4);
}

/* Global scroll smoothing and theme transitions */
html {
    scroll-behavior: smooth;
    transition: background-color 0.5s ease;
    /* light-mode fallback variables already in :root below */
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
    transition: background-color 0.5s ease, color 0.5s ease;
}

/* Custom premium scrollbar */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 20px;
    border: 3px solid var(--bg-primary);
}
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* Glassmorphic Components */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.03);
    transition: border-color 0.3s, background-color 0.3s, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s;
    will-change: transform, background-color;
}

.glass-card:hover {
    border-color: var(--glass-border-hover);
    background-color: var(--glass-bg-hover);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

/* Glassmorphic macOS Window */
.mac-window {
    background: var(--glass-bg);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border: 1px solid var(--glass-border);
    border-radius: 18px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
    overflow: hidden;
    transition: border-color 0.3s, background-color 0.5s, box-shadow 0.5s, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.mac-window:hover {
    border-color: var(--glass-border-hover);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.2);
}

/* macOS Window Header Toolbar */
.mac-header {
    background: rgba(0, 0, 0, 0.03);
    border-b: 1px solid var(--border-color);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    position: relative;
}
html.dark .mac-header {
    background: rgba(255, 255, 255, 0.02);
}

/* Traffic light buttons */
.traffic-lights {
    display: flex;
    gap: 8px;
    align-items: center;
}
.traffic-light {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    position: relative;
    cursor: pointer;
}
.traffic-light.close { background-color: var(--mac-close); }
.traffic-light.minimize { background-color: var(--mac-minimize); }
.traffic-light.maximize { background-color: var(--mac-maximize); }

.traffic-light::after {
    content: '';
    position: absolute;
    width: 6px;
    height: 6px;
    top: 3px;
    left: 3px;
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.2s ease;
}
.mac-header:hover .traffic-light::after {
    opacity: 0.3;
    background-color: #000;
}

/* Title bar text */
.mac-title {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

/* Glowing Skill Cards */
.skill-card {
    position: relative;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 20px;
    overflow: hidden;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: 12px;
    cursor: pointer;
    will-change: transform, box-shadow;
    contain: paint;
}

/* Glow implementation using CSS variable --glow-clr */
.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 16px;
    background: radial-gradient(80px circle at var(--x, 50%) var(--y, 50%), var(--glow-clr, rgba(168, 85, 247, 0.15)), transparent 80%);
    opacity: 0;
    transition: opacity 0.4s;
    pointer-events: none;
    z-index: 1;
}

.skill-card:hover {
    transform: translateY(-5px) scale(1.02);
    border-color: var(--glow-clr);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05), 0 0 20px var(--glow-clr);
}

.skill-card:hover::before {
    opacity: 1;
}

.skill-icon-wrapper {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.03);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-primary);
    transition: transform 0.3s ease;
    z-index: 2;
}
html.dark .skill-icon-wrapper {
    background: rgba(255, 255, 255, 0.03);
}
.skill-card:hover .skill-icon-wrapper {
    transform: scale(1.1);
}

.skill-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    z-index: 2;
}

/* Glassmorphism Title block & text glow */
.gradient-title {
    background: linear-gradient(135deg, var(--text-primary) 30%, #A855F7 70%, #3B82F6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.text-glow {
    text-shadow: 0 0 30px var(--text-glow-val);
}

/* Core pill layout */
.apple-pill {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-secondary);
}

/* ===========================================================
 * Theme Toggle Button  (inline-style button, JS manages knob)
 * =========================================================== */

/* When dark mode is active, JS adds .knob-dark to shift knob */
.switch-knob.knob-dark {
    transform: translateX(24px);
}

/* Canvas overlay: low z-index so all sections appear above */
#canvas-container {
    pointer-events: none;
    z-index: 2;
    transition: opacity 0.5s ease;
}
html:not(.dark) #canvas-container {
    opacity: 0.85; /* Soften canvas visualization on light mode */
}

/* Custom utilities */
.code-font {
    font-family: var(--font-mono);
}

/* Keyframe animations */
@keyframes pulseGlow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(168, 85, 247, 0.1);
    }
    50% {
        box-shadow: 0 0 35px rgba(168, 85, 247, 0.25);
    }
}

.glow-pulsing {
    animation: pulseGlow 4s infinite ease-in-out;
}