/* =========================================
   1. VARIABLES & SETUP
   ========================================= */
:root {
    --bg-dark: #0f172a;       /* Deepest Navy */
    --bg-gradient: radial-gradient(circle at 10% 10%, rgba(56, 189, 248, 0.1) 0%, rgba(15, 23, 42, 0) 40%);
    --text-main: #f8fafc;     /* Bright White */
    --text-muted: #94a3b8;    /* Slate Gray */
    --accent-color: #38bdf8;  /* Cyan/Sky Blue */
    --accent-glow: rgba(56, 189, 248, 0.5);
    
    /* Glassmorphism Settings */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: 1px solid rgba(255, 255, 255, 0.05);
    --glass-blur: blur(12px);
}

body {
    background-color: var(--bg-dark);
    background-image: var(--bg-gradient); /* The "Deep Space" Glow */
    background-attachment: fixed; /* Keeps gradient in place while scrolling */
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    overflow-x: hidden; /* Prevents horizontal scroll from animations */
}

/* Typography Overrides */
h1, h2, h3, h4, h5, .font-monospace {
    font-family: 'Roboto Mono', monospace;
}

.text-accent {
    color: var(--accent-color) !important;
    text-shadow: 0 0 20px var(--accent-glow); /* Neon Text Effect */
}

.text-light-50 {
    color: var(--text-muted);
}

/* =========================================
   2. GLASSMORPHISM (THE CORE UPGRADE)
   ========================================= */
/* Applying Glass effect to all cards */
.card {
    background: var(--glass-bg) !important;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur); /* Safari support */
    border: var(--glass-border) !important;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px); /* Float up effect */
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    border-color: rgba(255,255,255,0.2) !important;
}

/* Specific override for the Thesis card gradient */
.card[style*="linear-gradient"] {
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.9)) !important;
}

/* =========================================
   3. NAVIGATION (Frosted Glass)
   ========================================= */
.navbar {
    background-color: transparent;
    transition: all 0.4s ease;
    padding: 1.5rem 0;
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255,255,255,0.05);
    padding: 0.8rem 0;
}

.navbar-brand {
    color: var(--text-main) !important;
    font-weight: 700;
    font-size: 1.5rem;
}

.nav-link {
    color: var(--text-muted) !important;
    font-size: 0.9rem;
    font-weight: 500;
    margin-left: 1rem;
    transition: color 0.3s ease;
}

.nav-link:hover, .nav-link.active {
    color: var(--accent-color) !important;
}

/* =========================================
   4. NEON BADGES & BUTTONS
   ========================================= */
.badge {
    font-weight: 500;
    letter-spacing: 0.5px;
    padding: 0.5em 0.8em;
    border: 1px solid transparent;
    transition: all 0.3s ease;
}

/* Primary Badge (Blue) */
.badge.bg-primary {
    background-color: rgba(56, 189, 248, 0.15) !important;
    color: var(--accent-color);
    border-color: rgba(56, 189, 248, 0.3);
}

/* Secondary Badge (Gray) */
.badge.bg-secondary {
    background-color: rgba(148, 163, 184, 0.1) !important;
    color: #cbd5e1;
    border-color: rgba(148, 163, 184, 0.2);
}

.badge:hover {
    box-shadow: 0 0 15px var(--accent-glow);
    border-color: var(--accent-color);
    color: #fff;
}

/* Buttons */
.btn-primary {
    background-color: var(--accent-color);
    border: none;
    color: #0f172a;
    font-weight: 700;
    box-shadow: 0 0 15px rgba(56, 189, 248, 0.4);
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background-color: #7dd3fc;
    transform: scale(1.05);
    box-shadow: 0 0 25px rgba(56, 189, 248, 0.6);
}

.btn-outline-light:hover {
    background-color: var(--text-main);
    color: var(--bg-dark);
    box-shadow: 0 0 15px rgba(255,255,255,0.3);
}

/* =========================================
   5. FORM & TIMELINE STYLING
   ========================================= */
.form-control {
    background-color: rgba(0, 0, 0, 0.2) !important;
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-main) !important;
    backdrop-filter: blur(5px);
}

.form-control:focus {
    background-color: rgba(0, 0, 0, 0.4) !important;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 0.25rem rgba(56, 189, 248, 0.15);
}

/* Timeline vertical line upgrade */
.border-start {
    border-left: 2px solid rgba(255, 255, 255, 0.1) !important;
}

/* =========================================
   6. CUSTOM SCROLLBAR
   ========================================= */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: #334155; 
    border-radius: 4px;
}

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

/* Modals */
.modal-content {
    background-color: #1e293b;
    border: 1px solid rgba(255,255,255,0.1);
}/* =========================================
   7. NAVBAR PROFILE LOGO (The "Story Ring")
   ========================================= */
.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px; /* Space between logo and name if you add text later */
}

.profile-logo-frame {
    width: 100px;        /* Increased from 50px */
    height: 100px;       /* Increased from 50px */
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--accent-color);
    box-shadow: 0 0 15px var(--accent-glow);
    position: relative;
    background-color: var(--bg-dark);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    
    /* Fix for centering larger logos in navbar */
    flex-shrink: 0; 
}

/* Interaction: Pulse effect on hover */
.profile-logo-frame:hover {
    transform: scale(1.1);
    box-shadow: 0 0 25px var(--accent-color);
}

/* Ensure the video/image fills the circle perfectly */
.profile-logo-frame video, 
.profile-logo-frame img {
    width: 117%;
    height: 100%;
    object-fit: cover; /* Zoom to fill without stretching */
    display: block;
}
/* =========================================
   8. ROBUST LIGHT MODE SYSTEM
   ========================================= */
body.light-mode {
    /* 1. Color Variable Swaps */
    --bg-dark: #f8fafc;          /* Off-White Background */
    --bg-gradient: radial-gradient(circle at 10% 10%, rgba(2, 132, 199, 0.05) 0%, rgba(248, 250, 252, 0) 40%);
    --text-main: #1e293b;        /* Dark Slate Text (High Contrast) */
    --text-muted: #64748b;       /* Muted Slate */
    --accent-color: #0284c7;     /* Darker Blue for visibility */
    --accent-glow: rgba(2, 132, 199, 0.15);
    
    /* 2. Glassmorphism Inversion */
    --glass-bg: rgba(255, 255, 255, 0.7);     /* Frosted White */
    --glass-border: 1px solid rgba(0, 0, 0, 0.08); /* Faint Grey Border */
}

/* =========================================
   LIGHT MODE: GLOBAL TEXT OVERRIDES
   ========================================= */
/* Force all "text-white" elements to be dark in light mode */
body.light-mode .text-white {
    color: var(--text-main) !important;
}

/* Force all "text-light-50" (muted) to be darker grey */
body.light-mode .text-light-50 {
    color: var(--text-muted) !important;
}

/* Force headings to be dark */
body.light-mode h1, 
body.light-mode h2, 
body.light-mode h3, 
body.light-mode h4, 
body.light-mode h5 {
    color: var(--text-main) !important;
}

/* =========================================
   8. PREMIUM LIGHT MODE (THE "ICE" THEME)
   ========================================= */
body.light-mode {
    /* 1. Background: Subtle "Daylight" Gradient */
    --bg-dark: #f0f4f8; 
    /* This gradient ensures the glass cards have colors to blur behind them */
    --bg-gradient: radial-gradient(circle at 0% 0%, rgba(56, 189, 248, 0.15) 0%, rgba(255, 255, 255, 0) 50%),
                   radial-gradient(circle at 100% 100%, rgba(14, 165, 233, 0.1) 0%, rgba(255, 255, 255, 0) 50%);
    
    /* 2. Text: High Contrast Navy */
    --text-main: #0f172a;      
    --text-muted: #475569;     
    
    /* 3. Accent: Deep Azure (Visible on white) */
    --accent-color: #0284c7;   
    --accent-glow: rgba(2, 132, 199, 0.25); /* Stronger glow for light mode */
    
    /* 4. Glassmorphism: "Frosted Ice" Look */
    --glass-bg: rgba(255, 255, 255, 0.65); /* Semi-transparent white */
    --glass-border: 1px solid rgba(255, 255, 255, 0.9); /* Bright white edge highlights */
    --glass-blur: blur(15px); /* Stronger blur for depth */
}

/* =========================================
   LIGHT MODE: GLOBAL TEXT FIXES
   ========================================= */
/* Force text colors to flip */
body.light-mode .text-white { color: var(--text-main) !important; }
body.light-mode .text-light-50 { color: var(--text-muted) !important; }
body.light-mode h1, body.light-mode h2, body.light-mode h3, body.light-mode h4 { 
    color: var(--text-main) !important; 
}

/* =========================================
   LIGHT MODE: COMPONENT STYLING
   ========================================= */

/* 1. Ice Cards (The Key Upgrade) */
body.light-mode .card {
    background: var(--glass-bg) !important;
    border: var(--glass-border) !important;
    /* Soft blue shadow instead of harsh black */
    box-shadow: 0 8px 32px rgba(30, 41, 59, 0.08); 
}

body.light-mode .card:hover {
    box-shadow: 0 12px 40px rgba(2, 132, 199, 0.15); /* Blue glow on hover */
    background: rgba(255, 255, 255, 0.8) !important; /* More opaque on hover */
}

/* 2. Navbar: Frosted Glass Header */
body.light-mode .navbar.scrolled {
    background: rgba(255, 255, 255, 0.75);
    border-bottom: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: 0 4px 20px rgba(0,0,0,0.03);
}

body.light-mode .navbar-brand { color: var(--text-main) !important; }
body.light-mode .nav-link { color: var(--text-muted) !important; }
body.light-mode .nav-link:hover { color: var(--accent-color) !important; }

/* 3. Badges: Retain the "Pill" look but fit the light theme */
body.light-mode .badge.bg-secondary {
    background-color: rgba(255, 255, 255, 0.6) !important; /* Glass pill */
    color: var(--text-muted) !important;
    border: 1px solid rgba(203, 213, 225, 0.5);
    box-shadow: 0 2px 10px rgba(0,0,0,0.03);
}

body.light-mode .badge.bg-primary {
    background-color: rgba(2, 132, 199, 0.1) !important;
    color: var(--accent-color) !important;
    border: 1px solid rgba(2, 132, 199, 0.2);
}

/* 4. Form Inputs: "Deep" Inputs */
body.light-mode .form-control {
    background-color: rgba(255, 255, 255, 0.5) !important; /* See-through input */
    border: 1px solid rgba(203, 213, 225, 0.8);
    color: var(--text-main) !important;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}

body.light-mode .form-control:focus {
    background-color: #fff !important;
    box-shadow: 0 0 0 0.25rem rgba(2, 132, 199, 0.15);
}

/* 5. Buttons */
body.light-mode .btn-outline-light {
    color: var(--text-main);
    border-color: #cbd5e1;
    background: rgba(255,255,255,0.5); /* Glass button */
}

body.light-mode .btn-outline-light:hover {
    background: var(--accent-color);
    color: white !important;
    border-color: var(--accent-color);
}

/* 6. Timeline Line */
body.light-mode .border-start {
    border-left: 2px solid rgba(203, 213, 225, 0.8) !important;
}

/* =========================================
   EXCEPTION: THE THESIS CARD (Always Dark)
   ========================================= */
/* We keep the Thesis card dark because the chart colors (Cyan/Red) look best on dark */
body.light-mode .card[style*="linear-gradient"] {
    background: linear-gradient(145deg, #0f172a, #334155) !important;
    box-shadow: 0 10px 40px rgba(15, 23, 42, 0.4);
    border: 1px solid rgba(255,255,255,0.1) !important;
}

/* Force text inside Thesis card to stay white */
body.light-mode .card[style*="linear-gradient"] * {
    color: #f8fafc !important;
}

body.light-mode .card[style*="linear-gradient"] .badge {
    background-color: rgba(255,255,255,0.1) !important;
    border: 1px solid rgba(255,255,255,0.2);
}
/* Language Toggle Styling */
#lang-toggle {
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 4px;
    transition: all 0.3s ease;
}
#lang-toggle:hover {
    background: rgba(255,255,255,0.1);
    border-color: var(--accent-color);
    color: var(--accent-color) !important;
}
/* Light Mode adjustment for Lang Toggle */
body.light-mode #lang-toggle {
    color: var(--text-main) !important;
    border-color: rgba(0,0,0,0.1);
}
body.light-mode #lang-toggle:hover {
    color: var(--accent-color) !important;
    border-color: var(--accent-color);
}/* =========================================
   9. UNIVERSITY LOGO STYLING
   ========================================= */
.uni-logo-link {
    display: block;
    position: relative;
    text-decoration: none;
}

.uni-logo {
    width: 70px;          
    height: 70px;         
    object-fit: cover;    
    background-color: #fff; /* kept white bg to ensure jpgs look clean */
    padding: 2px;         
    border: 0px solid rgba(255,255,255,0.1); 
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275); 
    
    /* GLOBAL RECTANGLE SHAPE APPLIED HERE BY DEFAULT */
    border-radius: 12px; 
}

/* Hover Effect: Scale up + Neon Glow */
.uni-logo-link:hover .uni-logo {
    transform: scale(1.1);
    border-color: var(--accent-color); 
    box-shadow: 0 0 20px var(--accent-glow); 
    z-index: 2;
}
/* =========================================
   10. SVG 3D ICONS (Always Colored + 3D)
   ========================================= */
/* =========================================
   10. HYBRID 3D ICONS (Local & CDN Support)
   ========================================= */
.tech-svg {
    width: 60px;
    height: 60px;
    object-fit: contain; /* Ensures icons don't stretch */
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
    
    /* DEFAULT STATE: 3D Stack Effect */
    filter: drop-shadow(1px 1px 0px #020617)
            drop-shadow(2px 2px 0px #020617)
            drop-shadow(3px 3px 0px #020617);
            
    position: relative;
    z-index: 1;
    
    /* Safety for local files: rounded corners in case image is square */
    border-radius: 12px; 
}

/* HOVER STATE: Lift & Neon Glow */
.tech-svg:hover {
    transform: translateY(-8px) scale(1.1);
    
    filter: brightness(1.1) 
            drop-shadow(2px 2px 2px rgba(0,0,0,0.5))
            /* The Neon Glow */
            drop-shadow(0 0 15px var(--accent-color));
            
    z-index: 10;
}

/* Tooltip (Unchanged) */
.tech-tooltip-container {
    position: relative;
    display: inline-block;
}

/* HOVER STATE: Brighter & Neon Glow */
.tech-svg:hover {
    transform: translateY(-8px) scale(1.1);
    
    /* Make the colors slightly more vivid and add the glow */
    filter: brightness(1.1) 
            /* Soften the 3D shadow to look like it lifted up */
            drop-shadow(2px 2px 2px rgba(0,0,0,0.5))
            /* The Neon Glow (Cyan) */
            drop-shadow(0 0 15px var(--accent-color));
            
    z-index: 10;
}

/* Tooltip Container (Keep as is) */
.tech-tooltip-container {
    position: relative;
    display: inline-block;
}

.tech-tooltip-container::after {
    content: attr(data-title);
    position: absolute;
    bottom: -35px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(15, 23, 42, 0.95);
    color: #fff;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-family: 'Roboto Mono', monospace;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    white-space: nowrap;
    border: 1px solid rgba(255,255,255,0.1);
    z-index: 100;
}

.tech-tooltip-container:hover::after {
    opacity: 1;
    bottom: -40px;
}