/* =========================================
CSS for Soetan Demilade's Portfolio
Theme: Dynamic Professional v21 (Fullscreen Nav, Tech Stack)
Date: 2025-04-30
========================================= */

/* Table of Contents:
 Includes styles for Preloader, Approach Ring Light, Interactive Tech Stack,
 Fullscreen Mobile Nav, Custom Cursor, Toast Notification, Background Shine, etc.
*/

/* =========================================
1. Base & Variables
========================================= */
:root {
 /* Colors - Burnt Brown Accent */
 --color-accent: #A0522D;
 --color-accent-darker: #804224;
 --color-background: #141414;
 --color-surface: #1F1F1F;
 --color-surface-light: #2a2a2a;
 --color-text-primary: #F0F0F0;
 --color-text-secondary: #B8B8B8;
 --color-border: #444444;
 --color-overlay: rgba(20, 20, 20, 0.98); /* Darker overlay for fullscreen nav */
 --modal-overlay-bg: rgba(20, 20, 20, 0.85);
 --color-success: #3cb371;
 --color-error: #cd5c5c;
 --shadow-color: rgba(0, 0, 0, 0.3);
 --shadow-color-accent: rgba(160, 82, 45, 0.4);

 /* Typography */
 --font-heading: 'Poppins', sans-serif;
 --font-body: 'Inter', sans-serif;
 --font-code: 'Fira Code', 'Courier New', monospace;

 /* Spacing */
 --spacing-unit: 10px;
 --spacing-xs: calc(var(--spacing-unit) * 0.5);
 --spacing-sm: var(--spacing-unit);
 --spacing-md: calc(var(--spacing-unit) * 2);
 --spacing-lg: calc(var(--spacing-unit) * 4);
 --spacing-xl: calc(var(--spacing-unit) * 7);
 --spacing-xxl: calc(var(--spacing-unit) * 10);

 /* Transitions & Animations */
 --transition-speed: 0.35s;
 --transition-speed-fast: 0.2s;
 --transition-ease: cubic-bezier(0.25, 0.8, 0.25, 1);
 --transition-bounce: cubic-bezier(0.68, -0.6, 0.32, 1.6);
}

/* =========================================
2. Basic Reset & Body Styles
========================================= */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; background-color: var(--color-background); }
body {
 font-family: var(--font-body); background-color: var(--color-background); color: var(--color-text-primary);
 line-height: 1.7; overflow-x: hidden; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
 position: relative;
 /* Subtle Background Pattern */
 background-image: linear-gradient(135deg, rgba(255, 255, 255, 0.015) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.015) 50%, rgba(255, 255, 255, 0.015) 75%, transparent 75%, transparent);
 background-size: 9px 9px;
 cursor: auto; /* Default cursor fallback */
}
body.custom-cursor-active { cursor: none; }
body.no-scroll { overflow: hidden; }

/* Background Shine Effect */
body::before { content: ''; position: fixed; inset: 0; background: linear-gradient(110deg, transparent 30%, rgba(255, 255, 255, 0.03) 48%, rgba(255, 255, 255, 0.06) 50%, rgba(255, 255, 255, 0.03) 52%, transparent 70%); background-size: 300% 100%; background-position: 150% 0; opacity: 0; z-index: -1; pointer-events: none; transition: opacity 0.5s ease-out; }
body.body-shine::before { animation: backgroundShine 2.5s ease-out forwards; opacity: 1; }
@keyframes backgroundShine { 0% { background-position: 150% 0; } 100% { background-position: -50% 0; } }

/* =========================================
3. Geometric Bloom Preloader Styles
========================================= */
.preloader { position: fixed; inset: 0; background-color: var(--color-background); display: flex; flex-direction: column; justify-content: center; align-items: center; z-index: 9999; opacity: 1; visibility: visible; transition: opacity 0.6s ease-out 0.5s, visibility 0s linear 1.1s; }
body.loaded .preloader { opacity: 0; visibility: hidden; }
.preloader-shape { width: 60px; height: 60px; position: relative; animation: rotateShape 3s infinite linear; }
.preloader-shape::before, .preloader-shape::after { content: ''; position: absolute; width: 100%; height: 100%; border: 3px solid var(--color-accent); border-radius: 10% 40% 10% 40%; animation: morphShape 1.5s infinite ease-in-out alternate; }
.preloader-shape::after { transform: rotate(45deg); border-color: var(--color-accent-darker); animation-delay: -0.75s; }
@keyframes rotateShape { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes morphShape { 0%, 100% { border-radius: 10% 40% 10% 40%; transform: scale(1); } 50% { border-radius: 40% 10% 40% 10%; transform: scale(0.9); } }
.preloader-text { margin-top: var(--spacing-lg); color: var(--color-text-secondary); font-family: var(--font-body); font-size: 1rem; letter-spacing: 1px; opacity: 0.8; animation: fadeText 1.5s infinite ease-in-out alternate; }
@keyframes fadeText { from { opacity: 0.5; } to { opacity: 0.9; } }

/* =========================================
4. Custom Cursor Styles
========================================= */
.custom-cursor, .custom-cursor-dot { position: fixed; top: 0; left: 0; border-radius: 50%; pointer-events: none; z-index: 9999; mix-blend-mode: difference; transform: translate(-50%, -50%); opacity: 0; transition: width 0.3s ease, height 0.3s ease, background-color 0.3s ease, opacity 0.3s ease, transform 0.08s linear; will-change: transform; }
.custom-cursor.visible, .custom-cursor-dot.visible { opacity: 1; }
.custom-cursor { width: 30px; height: 30px; border: 1px solid var(--color-text-primary); background-color: transparent; }
.custom-cursor-dot { width: 6px; height: 6px; background-color: var(--color-text-primary); }
body.cursor-hover .custom-cursor { width: 45px; height: 45px; background-color: rgba(160, 82, 45, 0.2); border-color: var(--color-accent); }
body.cursor-hover .custom-cursor-dot { background-color: var(--color-accent); transform: translate(-50%, -50%) scale(1.5); }
body.cursor-idle .custom-cursor { width: 20px; height: 20px; border-width: 2px; }
body.cursor-idle .custom-cursor-dot { opacity: 0; transform: translate(-50%, -50%) scale(0.5);}
@media (pointer: coarse) { .custom-cursor, .custom-cursor-dot { display: none !important; } body { cursor: auto !important; } }

/* =========================================
5. Custom Scrollbar Styles
========================================= */
::-webkit-scrollbar { width: 9px; }
::-webkit-scrollbar-track { background: var(--color-surface); }
::-webkit-scrollbar-thumb { background-color: var(--color-accent); border-radius: 10px; border: 2.5px solid var(--color-surface); }
::-webkit-scrollbar-thumb:hover { background-color: var(--color-accent-darker); }
html { scrollbar-width: thin; scrollbar-color: var(--color-accent) var(--color-surface); }

/* =========================================
6. Headings & Text Styles
========================================= */
h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); font-weight: 700; color: var(--color-text-primary); margin-bottom: var(--spacing-md); line-height: 1.3; }
h1 { font-size: clamp(2.8rem, 7vw, 4.5rem); font-weight: 700; letter-spacing: -1.5px; }
.gradient-text { background: linear-gradient(90deg, var(--color-text-primary) 60%, var(--color-accent)); -webkit-background-clip: text; background-clip: text; color: transparent; display: inline-block; }
h2 { font-size: clamp(2rem, 6vw, 2.8rem); font-weight: 600; margin-bottom: var(--spacing-xl); }
h3 { font-size: 1.5rem; font-weight: 600; }
h4 { font-size: 1.1rem; font-weight: 600; color: var(--color-text-secondary); margin-top: var(--spacing-lg); margin-bottom: var(--spacing-xs); text-transform: uppercase; letter-spacing: 0.8px; }
p { margin-bottom: var(--spacing-md); color: var(--color-text-secondary); max-width: 65ch; }
.text-center p { margin-left: auto; margin-right: auto; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition-speed) var(--transition-ease); position: relative; cursor: none; }
a:hover, a:focus { color: var(--color-text-primary); outline: none; }
a:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 4px; border-radius: 2px; }
.section-subtitle { max-width: 60ch; margin: calc(-1 * var(--spacing-lg) + var(--spacing-sm)) auto var(--spacing-xl) auto; color: var(--color-text-secondary); font-size: 1.05rem; text-align: center; }
.value-icon { width: 1.4em; height: 1.4em; margin-right: var(--spacing-sm); fill: var(--color-accent); vertical-align: middle; transition: transform 0.4s var(--transition-bounce); }
.about-values span:hover .value-icon { transform: scale(1.25) rotate(10deg); }

/* Touch Feedback */
a:active, button:active, .btn:active, .btn-details:active, .social-icon-link:active i, .back-to-top:active, .tech-category-btn:active, .skill-node:active { transform: scale(0.96) translateY(1px); opacity: 0.8; transition: transform 0.1s ease, opacity 0.1s ease; }

/* =========================================
7. Utility & Layout Styles
========================================= */
.content-section { padding: var(--spacing-xxl) var(--spacing-lg); max-width: 1100px; margin: 0 auto; position: relative; overflow: hidden; }
.section-title { text-align: center; position: relative; padding-bottom: var(--spacing-md); cursor: none; }
.section-title::before, .section-title::after { content: ''; position: absolute; bottom: 0; height: 3px; background-color: var(--color-accent); width: 0; transition: width 0.7s var(--transition-ease) 0.1s, filter 0.3s ease; }
.section-title::before { left: 50%; transform: translateX(1.5px); }
.section-title::after { right: 50%; transform: translateX(-1.5px); }
.section-title.animate::before, .section-title.animate::after { width: 35px; }
.section-title:hover::before, .section-title:hover::after { filter: brightness(1.3) drop-shadow(0 0 2px var(--color-accent)); }

/* =========================================
8. Buttons - Unique Shapes
========================================= */
.btn, .btn-details { display: inline-block; font-family: var(--font-body); font-weight: 500; text-align: center; cursor: none; transition: all var(--transition-speed) var(--transition-ease); position: relative; overflow: hidden; border: none; z-index: 1; }
.btn { padding: calc(var(--spacing-sm) + 2px) calc(var(--spacing-lg) + 2px); color: var(--color-accent); background-color: transparent; letter-spacing: 0.5px; clip-path: polygon(15px 0%, 100% 0%, calc(100% - 15px) 100%, 0% 100%); border: 2px solid var(--color-accent); transition: all var(--transition-speed) var(--transition-ease), color 0s linear, border-color 0s linear var(--transition-speed), box-shadow var(--transition-speed) ease; }
.btn::before { content: ''; position: absolute; inset: -2px; background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-darker) 100%); transform: scaleX(0); transform-origin: left center; transition: transform var(--transition-speed) var(--transition-ease); z-index: -1; clip-path: inherit; }
.btn:hover::before, .btn:focus-visible::before { transform: scaleX(1); }
.btn:hover, .btn:focus-visible { color: var(--color-background); transform: translateY(-3px) scale(1.02); box-shadow: 0 6px 15px var(--shadow-color-accent); border-color: transparent; }
.btn i { margin-left: var(--spacing-sm); transition: transform 0.3s ease; }
.btn:hover i { transform: translateX(6px) scale(1.1); }
.btn-details { padding: var(--spacing-xs) var(--spacing-md); border: 1px solid var(--color-border); color: var(--color-text-secondary); background-color: transparent; font-size: 0.9rem; border-radius: 15px 4px 15px 4px; transition: all var(--transition-speed) var(--transition-ease), box-shadow var(--transition-speed) ease; }
.btn-details:hover, .btn-details:focus-visible { border-color: var(--color-accent); color: var(--color-accent); background-color: rgba(160, 82, 45, 0.08); transform: translateY(-2px); box-shadow: 0 4px 8px var(--shadow-color); }

/* =========================================
9. Header / Navbar Styles (Fullscreen Mobile Nav)
========================================= */
.site-header { position: fixed; top: 0; left: 0; width: 100%; background-color: transparent; backdrop-filter: none; z-index: 1000; padding: var(--spacing-md) var(--spacing-lg); transition: background-color var(--transition-speed) var(--transition-ease), box-shadow var(--transition-speed) var(--transition-ease); }
.site-header.scrolled { background-color: var(--color-overlay); backdrop-filter: blur(10px); box-shadow: 0 2px 15px rgba(0, 0, 0, 0.4); }
.navbar { display: flex; justify-content: space-between; align-items: center; max-width: 1100px; margin: 0 auto; position: relative; }
/* Logo */
.nav-logo a { font-weight: 700; font-size: 1.6rem; color: var(--color-text-primary); transition: color var(--transition-speed) var(--transition-ease); display: inline-block; letter-spacing: 0px; cursor: none; }
.nav-logo a:hover { color: var(--color-accent); animation: logoPulse 1.2s ease-in-out infinite alternate; }
@keyframes logoPulse { 0% { letter-spacing: 0px; filter: brightness(1); } 100% { letter-spacing: 1px; filter: brightness(1.1); } }

/* Desktop Menu */
.nav-menu-desktop { display: none; }
@media (min-width: 769px) {
 .nav-menu-desktop { display: flex; gap: var(--spacing-lg); list-style: none; padding: 0; margin: 0; }
 .nav-menu-desktop .nav-link { color: var(--color-text-secondary); font-weight: 500; padding: var(--spacing-xs) 0; position: relative; letter-spacing: 0.3px; transition: color var(--transition-speed) var(--transition-ease); }
 .nav-menu-desktop .nav-link::after { content: ''; position: absolute; bottom: -4px; left: 50%; transform: translateX(-50%); width: 0; height: 2px; background-color: var(--color-accent); transition: width var(--transition-speed) var(--transition-ease); }
 .nav-menu-desktop .nav-link:hover, .nav-menu-desktop .nav-link:focus-visible { color: var(--color-text-primary); outline: none; }
 .nav-menu-desktop .nav-link:hover::after, .nav-menu-desktop .nav-link:focus-visible::after { width: 100%; }
}

/* Custom CSS Hamburger/Close Button */
.hamburger { display: none; width: 30px; height: 22px; position: relative; cursor: none; background: none; border: none; padding: 0; z-index: 1003; /* Above overlay */ transition: transform 0.3s ease; }
.hamburger:hover { transform: scale(1.1); }
.hamburger-line { display: block; position: absolute; left: 0; width: 100%; height: 3px; background-color: var(--color-text-primary); border-radius: 3px; transition: transform 0.3s ease-in-out, top 0.3s ease-in-out, opacity 0.3s ease-in-out; transform-origin: center; }
.hamburger-line.line-1 { top: 0; }
.hamburger-line.line-2 { top: 50%; transform: translateY(-50%); }
.hamburger-line.line-3 { top: 100%; transform: translateY(-100%); }
.hamburger.active .hamburger-line.line-1 { top: 50%; transform: translateY(-50%) rotate(45deg); }
.hamburger.active .hamburger-line.line-2 { transform: scaleX(0); opacity: 0; }
.hamburger.active .hamburger-line.line-3 { top: 50%; transform: translateY(-50%) rotate(-45deg); }

/* Mobile Navigation Styles (Fullscreen Overlay - FIXED) */
.fullscreen-nav-menu {
 position: fixed; inset: 0; background-color: var(--color-overlay); backdrop-filter: blur(12px);
 display: flex; flex-direction: column; align-items: center; justify-content: center;
 opacity: 0; visibility: hidden; z-index: 1002; /* Below close button */
 transition: opacity var(--transition-speed) ease, visibility 0s linear var(--transition-speed);
}
.fullscreen-nav-menu.active { opacity: 1; visibility: visible; transition-delay: 0s; }

.fullscreen-nav-links { list-style: none; padding: 0; margin: 0; text-align: center; }
.fullscreen-nav-links li { opacity: 0; transform: translateY(20px); transition: opacity 0.3s ease, transform 0.3s ease; }
/* Stagger link animation */
.fullscreen-nav-menu.active .fullscreen-nav-links li { opacity: 1; transform: translateY(0); }
.fullscreen-nav-menu.active .fullscreen-nav-links li:nth-child(1) { transition-delay: 0.15s; }
.fullscreen-nav-menu.active .fullscreen-nav-links li:nth-child(2) { transition-delay: 0.20s; }
.fullscreen-nav-menu.active .fullscreen-nav-links li:nth-child(3) { transition-delay: 0.25s; }
.fullscreen-nav-menu.active .fullscreen-nav-links li:nth-child(4) { transition-delay: 0.30s; }
.fullscreen-nav-menu.active .fullscreen-nav-links li:nth-child(5) { transition-delay: 0.35s; }
.fullscreen-nav-menu.active .fullscreen-nav-links li:nth-child(6) { transition-delay: 0.40s; }

.fullscreen-nav-links .nav-link { font-size: clamp(1.5rem, 5vw, 2rem); color: var(--color-text-primary); padding: var(--spacing-sm) 0; display: block; font-weight: 600; transition: color var(--transition-speed) ease, letter-spacing 0.3s ease; }
.fullscreen-nav-links .nav-link:hover, .fullscreen-nav-links .nav-link:focus-visible { color: var(--color-accent); letter-spacing: 1px; outline: none; }
.fullscreen-nav-links .nav-link::after { display: none; }

/* Close button inside fullscreen menu */
.mobile-menu-close { position: absolute; top: var(--spacing-lg); right: var(--spacing-lg); display: block; }

@media (max-width: 768px) {
 .nav-menu-desktop { display: none; } /* Hide desktop links */
 .hamburger { display: block; } /* Show hamburger */
 /* Hide the mobile dropdown menu (replaced by fullscreen) */
 .nav-menu-mobile { display: none !important; }
}


/* =========================================
10. Hero Section Styles
========================================= */
.hero-section { min-height: 95vh; display: flex; align-items: center; justify-content: center; text-align: center; padding: var(--spacing-xxl) var(--spacing-lg); position: relative; overflow: hidden; }
.hero-content { max-width: 750px; position: relative; z-index: 2; }
.hero-title { font-size: clamp(3rem, 8vw, 5rem); font-weight: 700; margin-bottom: var(--spacing-sm); letter-spacing: -2px; line-height: 1.1; }
.hero-subtitle { font-size: clamp(1.2rem, 3.5vw, 1.6rem); color: var(--color-text-secondary); font-weight: 400; margin-bottom: var(--spacing-lg); max-width: 500px; margin-left: auto; margin-right: auto; min-height: 2.4em; }
.typing-cursor { display: inline-block; width: 2px; height: 1.2em; background-color: var(--color-accent); margin-left: var(--spacing-xs); vertical-align: text-bottom; opacity: 1; animation: blink 0.7s infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

/* =========================================
11. About Section Styles
========================================= */
.about-content { max-width: 800px; margin: 0 auto; text-align: center; }
.about-values { margin-top: var(--spacing-xl); display: flex; justify-content: center; flex-wrap: wrap; gap: var(--spacing-lg) var(--spacing-xl); font-weight: 500; color: var(--color-text-secondary); }
.about-values span { display: inline-flex; align-items: center; transition: color 0.3s ease; }
.value-item i, .value-icon { color: var(--color-accent); fill: var(--color-accent); margin-right: var(--spacing-sm); font-size: 1.3em; width: 1.4em; height: 1.4em; transition: transform 0.4s var(--transition-bounce); }
.about-values span:hover { color: var(--color-text-primary); }
.about-values span:hover i, .about-values span:hover .value-icon { transform: scale(1.25) rotate(10deg); }

/* =========================================
12. Approach Section Styles (Ring Light Hover)
========================================= */
.approach-section { background-color: var(--color-background); border-top: 1px solid var(--color-border); }
.approach-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: var(--spacing-xl); max-width: 900px; margin: var(--spacing-lg) auto 0; }
.approach-item { background-color: var(--color-surface); padding: var(--spacing-lg); border-radius: 8px; text-align: center; border: 1px solid var(--color-border); transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease; position: relative; overflow: hidden; }
/* Ring Light Effect */
.approach-item::before { content: ''; position: absolute; top: 50%; left: 50%; width: 0; height: 0; background: radial-gradient(circle, rgba(160, 82, 45, 0.3) 0%, transparent 70%); border-radius: 50%; transform: translate(-50%, -50%) scale(0); opacity: 0; transition: width 0.6s ease, height 0.6s ease, opacity 0.6s ease, transform 0.6s ease; z-index: 0; }
.approach-item:hover { transform: translateY(-5px); box-shadow: 0 8px 20px var(--shadow-color); }
.approach-item:hover::before { width: 300%; height: 300%; opacity: 1; transform: translate(-50%, -50%) scale(1); }
/* Ensure content stays above */
.approach-icon, .approach-title, .approach-item p { position: relative; z-index: 1; }
.approach-icon { font-size: 2.5rem; color: var(--color-accent); margin-bottom: var(--spacing-md); display: inline-block; transition: transform 0.3s ease; }
.approach-item:hover .approach-icon { transform: scale(1.1) rotate(-5deg); }
.approach-title { font-size: 1.3rem; color: var(--color-text-primary); margin-bottom: var(--spacing-sm); }
.approach-item p { font-size: 0.95rem; color: var(--color-text-secondary); max-width: none; }

/* =========================================
13. Interactive Tech Stack Section Styles
========================================= */
.tech-stack-section { background-color: var(--color-surface); }
.tech-stack-container { max-width: 900px; margin: var(--spacing-lg) auto 0; background-color: var(--color-background); padding: var(--spacing-lg); border-radius: 8px; border: 1px solid var(--color-border); }
.tech-categories { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--spacing-md); margin-bottom: var(--spacing-lg); border-bottom: 1px solid var(--color-border); padding-bottom: var(--spacing-lg); }
.tech-category-btn { padding: var(--spacing-sm) var(--spacing-lg); font-family: var(--font-body); font-size: 1rem; font-weight: 500; color: var(--color-text-secondary); background-color: transparent; border: 1px solid var(--color-border); border-radius: 30px; cursor: none; display: inline-flex; align-items: center; gap: var(--spacing-sm); transition: all var(--transition-speed) ease; }
.tech-category-btn i { opacity: 0.7; transition: opacity 0.3s ease, transform 0.3s ease; }
.tech-category-btn:hover, .tech-category-btn:focus { color: var(--color-text-primary); border-color: var(--color-accent-darker); background-color: rgba(160, 82, 45, 0.1); outline: none; }
.tech-category-btn:hover i { transform: scale(1.1); }
.tech-category-btn.active { color: var(--color-background); background-color: var(--color-accent); border-color: var(--color-accent); font-weight: 600; box-shadow: 0 4px 10px var(--shadow-color-accent); }
.tech-category-btn.active i { color: var(--color-background); opacity: 1; }
.tech-category-btn:focus.active { background-color: var(--color-accent-darker); }
.tech-details-container { position: relative; min-height: 220px; }
.tech-details { opacity: 0; max-height: 0; overflow: hidden; visibility: hidden; position: absolute; width: 100%; left: 0; transition: opacity var(--transition-speed) ease, max-height var(--transition-speed) ease, visibility 0s linear var(--transition-speed), transform var(--transition-speed) ease; transform: translateY(10px); padding-top: var(--spacing-md); }
.tech-details.active { opacity: 1; max-height: 1000px; visibility: visible; transform: translateY(0); position: relative; transition-delay: 0s; }
.tech-list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--spacing-lg); }
.tech-list li { display: flex; align-items: center; gap: var(--spacing-md); color: var(--color-text-secondary); font-size: 1rem; }
.tech-list i { font-size: 1.3rem; width: 25px; text-align: center; color: var(--color-accent); opacity: 0.9; transition: transform 0.3s var(--transition-bounce); }
.tech-list li:hover i { transform: scale(1.2) rotate(8deg); }

/* =========================================
14. Projects Section Styles (Placeholder)
========================================= */
.projects-section { background-color: var(--color-background); }
.placeholder-content { text-align: center; padding: var(--spacing-xl) 0; color: var(--color-text-secondary); }
.placeholder-icon { font-size: 3.5rem; color: var(--color-accent); opacity: 0.6; margin-bottom: var(--spacing-lg); display: block; margin-left: auto; margin-right: auto; }
.placeholder-icon i.fa-hourglass-start { display: inline-block; animation: subtle-rotate 4s infinite linear; }
@keyframes subtle-rotate { 0%, 100% { transform: rotate(0deg) scale(1); } 25% { transform: rotate(8deg) scale(1.05); } 50% { transform: rotate(0deg) scale(1); } 75% { transform: rotate(-8deg) scale(1.05); } }
.placeholder-content p { font-size: 1.1rem; max-width: 50ch; margin-left: auto; margin-right: auto; }
.placeholder-content .github-link { margin-top: var(--spacing-lg); }
a.link-subtle { color: var(--color-text-secondary); font-size: 0.9rem; text-decoration: underline; text-underline-offset: 3px; }
a.link-subtle:hover { color: var(--color-accent); }
a.link-subtle i { margin-left: var(--spacing-xs); font-size: 0.8em; }

/* =========================================
15. Contact Section Styles (Top Toast Notification Fixed)
========================================= */
.contact-section { background-color: var(--color-surface); border-top: 1px solid var(--color-border); }
.contact-form { max-width: 650px; margin: var(--spacing-xl) auto; }
.form-group { margin-bottom: var(--spacing-lg); position: relative; }
.form-group label { display: block; margin-bottom: var(--spacing-sm); font-weight: 500; color: var(--color-text-secondary); font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.8px; }
.form-group input, .form-group textarea { width: 100%; padding: var(--spacing-md); background-color: var(--color-background); border: 1px solid var(--color-border); border-radius: 6px; color: var(--color-text-primary); font-family: inherit; font-size: 1rem; transition: border-color var(--transition-speed) var(--transition-ease), box-shadow var(--transition-speed) var(--transition-ease); }
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--color-accent); box-shadow: 0 0 0 3px var(--shadow-color-accent); }
.form-group textarea { resize: vertical; min-height: 130px; }
/* Toast Notification Styles */
#form-status { position: fixed; top: var(--spacing-lg); left: 50%; transform: translate(-50%, calc(-100% - var(--spacing-lg) * 2)); background-color: var(--color-surface-light); color: var(--color-text-primary); padding: var(--spacing-sm) var(--spacing-lg); border-radius: 6px; box-shadow: 0 5px 20px rgba(0, 0, 0, 0.4); border-left: 5px solid var(--color-text-secondary); z-index: 1010; min-width: 280px; max-width: calc(100% - 2 * var(--spacing-lg)); width: auto; text-align: center; font-size: 0.95rem; font-weight: 500; opacity: 0; visibility: hidden; transition: transform 0.5s var(--transition-bounce), opacity 0.4s ease, visibility 0s linear 0.5s, border-left-color 0.3s ease; pointer-events: none; }
#form-status.form-status--visible { transform: translate(-50%, 0); opacity: 1; visibility: visible; transition-delay: 0s, 0s, 0s; }
#form-status.form-status--success { border-left-color: var(--color-success); }
#form-status.form-status--error { border-left-color: var(--color-error); }
#form-status::before { font-family: "Font Awesome 6 Free"; font-weight: 900; margin-right: var(--spacing-sm); vertical-align: middle; font-size: 1.1em; }
#form-status.form-status--success::before { content: "\f058"; color: var(--color-success); }
#form-status.form-status--error::before { content: "\f071"; color: var(--color-error); }
#form-status.form-status--sending { border-left-color: var(--color-text-secondary); animation: pulse-border 1.5s infinite ease-in-out; }
@keyframes pulse-border { 0%, 100% { border-left-width: 5px; } 50% { border-left-width: 7px; } }

.social-links { text-align: center; margin-top: var(--spacing-xxl); display: flex; justify-content: center; gap: var(--spacing-xl); flex-wrap: wrap; }
.social-icon-link i { transition: transform 0.4s var(--transition-bounce), color var(--transition-speed) var(--transition-ease); }
.social-icon-link:hover i { transform: scale(1.3) rotate(-8deg); }
.social-links a { font-size: 2rem; color: var(--color-text-secondary); display: inline-block; cursor: none; }
.social-links a:hover, .social-links a:focus-visible { color: var(--color-accent); outline: none; }
.social-links a:active i { transform: scale(1.1); }
.location { text-align: center; margin-top: var(--spacing-lg); color: var(--color-text-secondary); font-size: 0.9rem; }
.location i { margin-right: var(--spacing-xs); color: var(--color-accent); opacity: 0.8; }

/* =========================================
16. Footer Styles
========================================= */
.site-footer { text-align: center; padding: var(--spacing-xl); margin-top: 0; border-top: 1px solid var(--color-border); color: var(--color-text-secondary); font-size: 0.9rem; position: relative; background-color: var(--color-background); }
.footer-content { display: flex; flex-direction: column; align-items: center; gap: var(--spacing-sm); }
.location-time { font-size: 0.85rem; opacity: 0.7; min-height: 1.2em; }
.back-to-top { position: absolute; right: var(--spacing-lg); bottom: var(--spacing-lg); font-size: 1.5rem; color: var(--color-text-secondary); opacity: 0.6; transition: opacity var(--transition-speed) var(--transition-ease), color var(--transition-speed) var(--transition-ease), transform var(--transition-speed) var(--transition-ease); cursor: none; }
.back-to-top:hover, .back-to-top:focus-visible { opacity: 1; color: var(--color-accent); transform: translateY(-3px); outline: none; }
.back-to-top:active { transform: translateY(-1px); }

/* =========================================
17. Animation & Scroll Effect Styles
========================================= */
.animate-on-load, .animate-on-scroll { opacity: 0; transform: translateY(50px); transition: opacity 1s var(--transition-ease), transform 1s var(--transition-ease); will-change: opacity, transform; transition-delay: 0ms; }
.animate-on-load.visible, .animate-on-scroll.visible { opacity: 1; transform: translateY(0); }
/* Stagger delays applied via JS */

/* =========================================
18. Project Modal Styles (Kept for future use)
========================================= */
/* Styles remain the same */
.modal-overlay { position: fixed; inset: 0; background-color: var(--modal-overlay-bg); display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden; transition: opacity var(--transition-speed) ease-out, visibility 0s linear var(--transition-speed), backdrop-filter var(--transition-speed) ease-out; z-index: 1001; padding: var(--spacing-md); backdrop-filter: blur(0px); }
.modal-overlay[aria-hidden="false"] { opacity: 1; visibility: visible; transition-delay: 0s; backdrop-filter: blur(8px); }
.modal-content { background-color: var(--color-surface); padding: var(--spacing-lg) var(--spacing-xl); border-radius: 8px; max-width: 750px; width: 95%; max-height: 90vh; overflow-y: auto; position: relative; box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4); transform: translateY(-20px) scale(0.98); transition: transform var(--transition-speed) var(--transition-ease); border-top: 4px solid var(--color-accent); }
.modal-overlay[aria-hidden="false"] .modal-content { transform: translateY(0) scale(1); }
.modal-close-btn { position: absolute; top: var(--spacing-md); right: var(--spacing-md); background: none; border: none; font-size: 2.2rem; color: var(--color-text-secondary); cursor: none; line-height: 1; padding: var(--spacing-xs); transition: color var(--transition-speed) var(--transition-ease), transform var(--transition-speed) var(--transition-ease); }
.modal-close-btn:hover, .modal-close-btn:focus-visible { color: var(--color-accent); transform: rotate(180deg) scale(1.1); outline: none; }
.modal-project-title { font-size: 1.8rem; margin-bottom: var(--spacing-md); color: var(--color-text-primary); }
.modal-project-description { font-size: 1rem; line-height: 1.8; margin-bottom: var(--spacing-lg); color: var(--color-text-secondary); }
.modal-project-tech { font-size: 0.9rem; color: var(--color-text-secondary); margin-bottom: var(--spacing-lg); line-height: 1.6; word-spacing: 3px; opacity: 0.9; }
.modal-links { display: flex; flex-wrap: wrap; gap: var(--spacing-lg); margin-top: var(--spacing-lg); border-top: 1px solid var(--color-border); padding-top: var(--spacing-lg); }
.modal-link-button { display: inline-flex; padding: var(--spacing-xs) var(--spacing-md); border: 1px solid var(--color-border); border-radius: 20px; font-size: 0.9rem; font-weight: 500; color: var(--color-text-secondary); background-color: transparent; cursor: none; transition: all var(--transition-speed) var(--transition-ease); text-decoration: none; align-items: center; }
.modal-link-button i { margin-right: var(--spacing-sm); }
.modal-link-button:hover, .modal-link-button:focus-visible { background-color: var(--color-surface); color: var(--color-accent); border-color: var(--color-accent); transform: translateY(-1px); }

/* =========================================
19. Responsiveness Adjustments
========================================= */
@media (max-width: 768px) { /* Tablet and smaller */
 html { font-size: 15px; }
 h1 { font-size: clamp(2.4rem, 8vw, 3rem); }
 h2 { font-size: clamp(1.8rem, 6vw, 2.2rem); margin-bottom: var(--spacing-lg); }
 .content-section { padding: var(--spacing-xl) var(--spacing-md); }
 .hero-section { min-height: 85vh; padding-top: calc(var(--spacing-xxl)); }
 /* Mobile menu trigger button */
 .hamburger { display: block; }
 /* Grid stacking */
 .approach-grid { grid-template-columns: 1fr; gap: var(--spacing-lg); }
 .tech-list { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
 /* Modal adjustments */
 .modal-content { width: 90%; padding: var(--spacing-lg) var(--spacing-md); }
 .modal-project-title { font-size: 1.6rem; }
 .modal-links { justify-content: center; }
 /* Toast notification responsiveness */
 #form-status { left: var(--spacing-md); right: var(--spacing-md); transform: translate(0, calc(-100% - var(--spacing-md) * 2)); max-width: none; width: auto; }
 #form-status.form-status--visible { transform: translate(0, 0); }
}
@media (max-width: 480px) { /* Small mobile */
 .content-section { padding: var(--spacing-lg) var(--spacing-sm); }
 .btn { padding: var(--spacing-sm) var(--spacing-md); font-size: 0.9rem; }
 .social-links { gap: var(--spacing-lg); }
 .social-links a { font-size: 1.8rem; }
 .footer-content { gap: var(--spacing-sm); }
 .location-time { font-size: 0.8rem; }
 /* Tech stack list single column */
 .tech-categories { gap: var(--spacing-xs); }
 .tech-category-btn { font-size: 0.9rem; padding: var(--spacing-xs) var(--spacing-sm); gap: var(--spacing-xs);}
 .tech-list { grid-template-columns: 1fr; }
}