@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

:root {
    /* Dynamic Theme Defaults (Managed by JS) */
    --accent-dynamic: #5c7cfa;
    --glass-opacity: 0.75;
    --glass-blur: 15px;

    /* Base Colors - Dark Mode */
    --bg-base: #121212;             
    --glass-rgb: 30, 30, 35;
    --glass-border: rgba(255, 255, 255, 0.08); 
    --text-main: #e2e8f0;
    --text-muted: #94a3b8;
    --input-bg: #000;
    
    /* Calculated Glass */
    --glass-bg: rgba(var(--glass-rgb), var(--glass-opacity));
    --glass-hover: rgba(var(--glass-rgb), calc(var(--glass-opacity) + 0.15));

    /* Accents */
    --accent-blue: #5c7cfa;   
    --accent-green: #40c057;  
    --accent-yellow: #fcc419; 
    --accent-purple: #be4bdb; 
    --accent-red: #ff6b6b;    
    
    --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.2);
}

/* Light Mode Overrides */
body.light-mode {
    --bg-base: #f8fafc;
    --glass-rgb: 255, 255, 255;
    --glass-border: rgba(0, 0, 0, 0.1);
    --text-main: #0f172a;
    --text-muted: #64748b;
    --input-bg: #f1f5f9;
    color-scheme: light; /* Forces native popups back to light */
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: transparent; 
    color: var(--text-main);
    margin: 0;
    display: flex;
    height: 100vh;
    overflow: hidden;
    transition: color 0.3s ease;
    color-scheme: dark; /* Forces native popups to be dark */
}

/* --- PROGRESSIVE BACKGROUND (WEBGL) --- */
#gradient-canvas {
    position: fixed; /* Keeps the background fixed during scroll */
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -100; /* Keeps it behind all dashboard elements */
    
    /* Default Dark Mode Colors */
    --gradient-color-1: #034397; 
    --gradient-color-2: #008da0; 
    --gradient-color-3: #00031B;  
    --gradient-color-4: #00031B;
}

/* Optional: Colors change automatically when Light Mode is toggled */
body.light-mode #gradient-canvas {
    --gradient-color-1: #5c7cfa; 
    --gradient-color-2: #2bff00; 
    --gradient-color-3: #FFFFFF;  
    --gradient-color-4: #f8fafc;
}

/* --- MOBILE HEADER & OVERLAY --- */
.mobile-header {
    display: none;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--glass-border);
    position: fixed;
    top: 0; left: 0; width: 100%;
    z-index: 20; box-sizing: border-box;
}
.mobile-header .menu-btn {
    background: none; border: none; color: var(--text-main); font-size: 20px; cursor: pointer;
}
.mobile-overlay {
    display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.5); z-index: 15; opacity: 0; transition: opacity 0.3s;
}
.mobile-overlay.show { display: block; opacity: 1; }

/* --- SIDEBAR --- */
.sidebar {
    width: 260px; background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur)); -webkit-backdrop-filter: blur(var(--glass-blur));
    border-right: 1px solid var(--glass-border);
    display: flex; flex-direction: column; padding: 20px 0; z-index: 30;
    transition: transform 0.3s ease;
}

.brand { font-size: 20px; font-weight: 700; text-align: center; letter-spacing: 1px; color: var(--text-main); margin-bottom: 20px;}
.brand span { color: var(--accent-dynamic); transition: color 0.3s; }
.mobile-header .brand { margin-bottom: 0; }

.user-profile { text-align: center; padding: 0 20px 20px 20px; border-bottom: 1px solid var(--glass-border); margin-bottom: 20px; }
.user-profile h3 { margin: 0; font-size: 15px; font-weight: 500; color: var(--text-main);}

.nav-links { list-style: none; padding: 0; margin: 0; flex: 1; overflow-y: auto;}
.nav-links li { margin-bottom: 4px; padding: 0 15px; }
.nav-links a {
    display: flex; align-items: center; gap: 12px; padding: 12px 20px; 
    color: var(--text-muted); text-decoration: none; font-size: 13px; font-weight: 500; 
    transition: all 0.2s ease; border-radius: 8px; cursor: pointer;
}
.nav-links a:hover, .nav-links a.active { color: var(--text-main); background: var(--glass-hover); }
.nav-links .section-title { font-size: 10px; text-transform: uppercase; color: var(--text-muted); padding: 10px 20px 5px 20px; letter-spacing: 1px; }

.credit-bar { text-align: center; font-size: 10px; color: var(--text-muted); padding: 15px; border-top: 1px solid var(--glass-border); margin: 10px 15px 0 15px; }

.logout-btn {
    margin: 10px 20px 20px 20px; background: rgba(255, 107, 107, 0.05); color: var(--accent-red); 
    border: 1px solid rgba(255, 107, 107, 0.2); padding: 12px; border-radius: 8px; 
    cursor: pointer; transition: 0.2s; font-weight: 600; font-family: inherit; font-size: 12px; text-transform: uppercase;
}
.logout-btn:hover { background: var(--accent-red); color: #fff; }

/* --- MAIN CONTENT & TABS --- */
.main-content { flex: 1; padding: 40px; overflow-y: auto; position: relative; }

.tab-pane { display: none; animation: fadeIn 0.3s ease; }
.tab-pane.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.page-header { margin-bottom: 40px; }
.page-header h1 { margin: 0; font-size: 26px; font-weight: 500; letter-spacing: -0.5px;}
.page-header p { margin: 5px 0 0 0; color: var(--text-muted); font-size: 14px; }

/* --- CARDS & FORMS --- */
.dash-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.dash-card, .form-panel {
    background: var(--glass-bg); border: 1px solid var(--glass-border); 
    border-radius: 16px; padding: 25px; 
    backdrop-filter: blur(var(--glass-blur)); -webkit-backdrop-filter: blur(var(--glass-blur));
    transition: 0.2s ease; box-shadow: var(--shadow-soft);
}
.dash-card { display: flex; flex-direction: column; }
.dash-card:hover { transform: translateY(-3px); border-color: rgba(255,255,255,0.2); }
.dash-card i { font-size: 24px; margin-bottom: 20px; opacity: 0.9;}
.dash-card h3 { margin: 0 0 8px 0; font-size: 16px; font-weight: 500;}
.dash-card p { margin: 0 0 25px 0; font-size: 13px; color: var(--text-muted); line-height: 1.6; flex-grow: 1; }

.btn-action, .btn-submit {
    display: inline-block; background: var(--glass-bg); color: var(--text-main); 
    text-align: center; padding: 12px 15px; border-radius: 8px; text-decoration: none;
    font-size: 12px; font-weight: 600; transition: 0.2s; border: 1px solid var(--glass-border); 
    cursor: pointer; width: 100%; box-sizing: border-box; text-transform: uppercase;
}
.btn-action:hover, .btn-submit:hover { background: var(--accent-dynamic); color: #fff; border-color: var(--accent-dynamic); }

.input-group { margin-bottom: 15px; }
.input-group label { display: block; font-size: 11px; color: var(--text-muted); margin-bottom: 5px; text-transform: uppercase; font-weight: 600; }
.input-group input, .input-group select {
    width: 100%; padding: 12px; background: var(--input-bg); border: 1px solid var(--glass-border);
    color: var(--text-main); border-radius: 8px; font-family: inherit; font-size: 13px; box-sizing: border-box; outline: none; transition: 0.3s;
}
.input-group input:focus, .input-group select:focus { border-color: var(--accent-dynamic); }
.input-group input[type="range"] { padding: 0; height: 5px; -webkit-appearance: none; background: var(--glass-border); margin-top: 10px; margin-bottom: 10px; }
.input-group input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 15px; height: 15px; background: var(--accent-dynamic); border-radius: 50%; cursor: pointer;}

#loadingScreen {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: var(--bg-base); z-index: 1000;
    display: flex; justify-content: center; align-items: center; color: var(--text-muted); font-size: 16px;
}

/* --- MOBILE RESPONSIVENESS --- */
@media (max-width: 768px) {
    .mobile-header { display: flex; }
    
    .sidebar {
        position: fixed; top: 0; left: 0; height: 100%;
        transform: translateX(-100%); 
    }
    .sidebar.show { transform: translateX(0); }
    .desktop-brand { display: none; } /* Hide brand in sidebar since it's in header */

    .main-content {
        padding: 80px 20px 30px 20px; /* Make room for mobile header */
    }
    
    .dash-grid { grid-template-columns: 1fr; }
}

/* Make textareas match the sleek dark inputs */
.input-group textarea {
    width: 100%; 
    padding: 12px; 
    background: var(--input-bg); 
    border: 1px solid var(--glass-border);
    color: var(--text-main); 
    border-radius: 8px; 
    font-family: inherit; 
    font-size: 13px; 
    box-sizing: border-box; 
    outline: none; 
    transition: 0.3s;
}
.input-group textarea:focus { 
    border-color: var(--accent-dynamic); 
    box-shadow: 0 0 10px rgba(0, 212, 234, 0.1); /* Subtle glow on focus */
}

/* =========================================================
    CUSTOM GLOWING CHECKBOXES
========================================================= */
.checkbox-label input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 22px;
    height: 22px;
    background: rgba(0,0,0,0.5);
    border: 2px solid var(--glass-border);
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    transition: all 0.3s ease;
    flex-shrink: 0;
    margin: 0;
}

.checkbox-label input[type="checkbox"]:checked {
    background: var(--accent-dynamic);
    border-color: var(--accent-dynamic);
    box-shadow: 0 0 15px var(--accent-dynamic), inset 0 0 5px rgba(255,255,255,0.5);
}

.checkbox-label input[type="checkbox"]:checked::after {
    content: '\f00c'; /* FontAwesome Check Icon */
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    color: #000; /* Dark icon on bright accent background */
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 12px;
}

/* =========================================================
    GLASSY CALENDAR (DATE PICKER) THEME
========================================================= */
input[type="date"]::-webkit-calendar-picker-indicator {
    background-color: var(--accent-dynamic);
    padding: 6px;
    cursor: pointer;
    border-radius: 6px;
    opacity: 0.8;
    transition: all 0.3s ease;
}

input[type="date"]::-webkit-calendar-picker-indicator:hover {
    opacity: 1;
    box-shadow: 0 0 12px var(--accent-dynamic);
    transform: scale(1.05);
}

/* =========================================================
   CUSTOM GLASSY CALENDAR (FLATPICKR OVERRIDES)
========================================================= */
.flatpickr-calendar {
    background: var(--glass-bg) !important;
    backdrop-filter: blur(var(--glass-blur)) !important;
    -webkit-backdrop-filter: blur(var(--glass-blur)) !important;
    border: 1px solid var(--glass-border) !important;
    border-radius: 16px !important;
    box-shadow: var(--shadow-soft) !important;
    color: var(--text-main) !important;
    padding: 10px !important;
}

.flatpickr-months .flatpickr-month,
.flatpickr-months .flatpickr-prev-month, 
.flatpickr-months .flatpickr-next-month {
    color: var(--text-main) !important;
    fill: var(--text-main) !important;
}

.flatpickr-months .flatpickr-prev-month:hover svg, 
.flatpickr-months .flatpickr-next-month:hover svg {
    fill: var(--accent-dynamic) !important;
}

.flatpickr-current-month .flatpickr-monthDropdown-months {
    background: var(--input-bg) !important;
    color: var(--text-main) !important;
    border-radius: 6px !important;
    padding: 4px !important;
    outline: none !important;
}

.flatpickr-current-month .numInputWrapper span.arrowUp:after { border-bottom-color: var(--text-main) !important; }
.flatpickr-current-month .numInputWrapper span.arrowDown:after { border-top-color: var(--text-main) !important; }

span.flatpickr-weekday {
    color: var(--text-muted) !important;
    font-weight: 600 !important;
}

.flatpickr-day {
    color: var(--text-main) !important;
    border-radius: 8px !important;
    border: 1px solid transparent !important;
    transition: all 0.2s ease !important;
}

.flatpickr-day:hover, .flatpickr-day:focus {
    background: rgba(255,255,255,0.1) !important;
    border-color: var(--glass-border) !important;
}

.flatpickr-day.selected, .flatpickr-day.startRange, .flatpickr-day.endRange {
    background: var(--accent-dynamic) !important;
    color: #000 !important;
    border-color: var(--accent-dynamic) !important;
    box-shadow: 0 0 10px var(--accent-dynamic) !important;
    font-weight: bold !important;
}

.flatpickr-day.flatpickr-disabled, .flatpickr-day.flatpickr-disabled:hover, 
.flatpickr-day.prevMonthDay, .flatpickr-day.nextMonthDay {
    color: rgba(255,255,255,0.2) !important;
}

/* Hide the little triangle pointer */
.flatpickr-calendar.arrowTop:before, .flatpickr-calendar.arrowTop:after,
.flatpickr-calendar.arrowBottom:before, .flatpickr-calendar.arrowBottom:after {
    display: none !important;
}

/* Fix calendar icon color inside input */
.input-group input[data-input] { cursor: pointer; }