/* --- Google Font Import --- */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;700&display=swap');

/* --- THEME & LAYOUT VARIABLES --- */
:root {
    /* Dark Theme Colors */
    --bg-dark: #0a041f;
    --bg-light: #110b2b;
    --bg-card: rgba(30, 20, 70, 0.5); /* Glassmorphism effect */
    --border-color: rgba(255, 255, 255, 0.15);
    --text-primary: #ffffff;
    --text-secondary: #a3a2b7;
    --accent-blue: #4a55ff;
    --accent-purple: #a349f4;
    --shadow-color: rgba(74, 85, 255, 0.2);
    --font-main: 'Poppins', sans-serif;
}

body.light-theme {
    /* Light Theme Colors */
    --bg-dark: #f0f2f5;
    --bg-light: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.7); /* Glassmorphism effect */
    --border-color: #e0e5ec;
    --text-primary: #1c2a5e;
    --text-secondary: #5a6a9a;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

/* --- General Resets & Body --- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-main);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

/* --- Header & Theme Switcher --- */
header {
    padding: 1rem 5%;
    background-color: rgba(10, 4, 31, 0.5); /* Semi-transparent for glass effect */
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky; top: 0; z-index: 1000;
    display: flex; justify-content: space-between; align-items: center;
}
body.light-theme header { background-color: rgba(255, 255, 255, 0.5); }
header .logo { display: flex; align-items: center; gap: 12px; }
header .logo i { color: var(--accent-blue); font-size: 2rem; }
header h1 { font-weight: 700; font-size: 1.25rem; }
.theme-switcher { display: flex; align-items: center; gap: 0.5rem; }
.theme-switcher .fas { color: var(--text-secondary); }
.switch { position: relative; display: inline-block; width: 50px; height: 26px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: #777; transition: .4s; }
.slider:before { position: absolute; content: ""; height: 20px; width: 20px; left: 3px; bottom: 3px; background-color: white; transition: .4s; }
input:checked + .slider { background-color: var(--accent-blue); }
input:checked + .slider:before { transform: translateX(24px); }
.slider.round { border-radius: 34px; }
.slider.round:before { border-radius: 50%; }
.logo-sub {
    font-size: 0.8rem;
    font-weight: 400;
    opacity: 0.7;
}


/* --- Main Content --- */
main { padding: 0 5% 2rem 5%; }
.banner { text-align: center;  padding: 4rem 1rem;    margin-bottom: 2rem;    border-radius: 15px;    background: linear-gradient(45deg, var(--accent-blue), var(--accent-purple)); }
.banner h2 { font-weight: 700; font-size: 2.5rem; color: #fff; }
.banner p { font-size: 1.1rem; margin-top: 0.5rem; margin-bottom: 1.5rem; opacity: 0.9; color: #fff; }
.search-container { display: flex; flex-direction: column; gap: 10px; max-width: 600px; margin: 0 auto; }
#search-input { width: 100%; padding: 1rem; border: 1px solid var(--border-color); border-radius: 50px; font-size: 1rem; font-family: var(--font-main); outline: none; background-color: var(--bg-light); color: var(--text-primary); }
#search-button { padding: 1rem 2rem; border: none; border-radius: 50px; background: var(--accent-blue); color: #fff; font-size: 1rem; font-weight: 500; cursor: pointer; transition: transform 0.2s ease; }
#search-button:hover { transform: scale(1.05); }

/* --- States & Toolbar --- */
#loading-indicator, #video-loading-indicator { text-align: center; padding: 2rem; margin: 2rem auto; }
.spinner { width: 50px; height: 50px; border: 5px solid var(--bg-light); border-top: 5px solid var(--accent-blue); border-radius: 50%; animation: spin 1s linear infinite; margin: 0 auto 1rem; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
.toolbar { text-align: center; margin-bottom: 2rem; }
#download-report-btn { padding: 0.75rem 1.5rem; border: none; border-radius: 50px; background: var(--accent-blue); color: #fff; font-size: 1rem; font-weight: 500; cursor: pointer; transition: transform 0.2s ease; }
#download-report-btn:hover { transform: scale(1.05); }

#refresh-videos-btn { padding: 0.75rem 1.5rem; border: none; border-radius: 50px; background: var(--accent-blue); color: #fff; font-size: 1rem; font-weight: 500; cursor: pointer; transition: transform 0.2s ease; }
#refresh-videos-btn:hover { transform: scale(1.05); }

/* --- Results --- */
.hidden { display: none; }
#report-content { background-color: var(--bg-dark); }
section { margin-bottom: 4rem; }
section h3 { font-size: 2rem; font-weight: 700; text-align: center; margin-bottom: 2rem; }
section h3::after { content: ''; display: block; width: 60px; height: 3px; background-color: var(--accent-blue); margin: 8px auto 0; border-radius: 2px; }
#channel-header { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 1.5rem; background-color: var(--bg-light); padding: 2.5rem; border-radius: 16px; border: 1px solid var(--border-color); }
#channel-pfp { width: 100px; height: 100px; border-radius: 50%; border: 3px solid var(--accent-blue); }

/* --- GRID SYSTEM --- */
.grid-container { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
.analytics-block, .chart-container {
    background: var(--bg-card); backdrop-filter: blur(10px);
    padding: 1.5rem; border-radius: 16px; border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.analytics-block:hover, .chart-container:hover { transform: translateY(-8px); box-shadow: 0 15px 35px var(--shadow-color); }
.analytics-block h4 { color: var(--text-secondary); font-size: 0.9rem; font-weight: 500; text-transform: uppercase; }
.analytics-block p { font-size: 1.75rem; font-weight: 700; word-break: break-all; }
.revenue-block { background: linear-gradient(45deg, #d32f2f, #e53935); color: #fff; }

/* --- RESPONSIVE LAYOUT --- */
/* TABLET: 768px and up */
@media (min-width: 768px) {
    header h1 { font-size: 1.5rem; }
    .banner h2 { font-size: 3.5rem; }
    .search-container { flex-direction: row; gap: 0; }
    #search-input { border-radius: 50px 0 0 50px; }
    #search-button { border-radius: 0 50px 50px 0; }
    #channel-header { flex-direction: row; text-align: left; align-items: center; }
    .grid-container { grid-template-columns: repeat(2, 1fr); }
}

/* LAPTOP: 1024px and up */
@media (min-width: 1024px) {
    .grid-container { grid-template-columns: repeat(3, 1fr); }
}

/* DESKTOP: 1440px and up */
@media (min-width: 1440px) {
    #analytics-grid { grid-template-columns: repeat(4, 1fr); }
    #analytics-grid .revenue-block { grid-column: span 2; }
}