/* Import Professional Font */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&display=swap');

:root {
    /* True Black Palette */
    --bg-body: #0D0D0D;        
    --bg-card: #0a0a0a;        
    --bg-card-hover: #111111;
    
    /* Borders & Accents */
    --border-color: #1f1f1f;
    --border-active: #333333;

    /* Typography */
    --text-primary: #ffffff;
    --text-secondary: #9ca3af; 
    --text-tertiary: #4b5563;

    /* Default Accent */
    --accent-color: #3b82f6; 
    --accent-hover: #2563eb;
    --accent-glow: rgba(59, 130, 246, 0.15);

    /* Functional Colors */
    --color-error: #ef4444;
    --color-success: #10b981;

    /* NoteMaker Specific Globals (Preserved) */
    --paper-line-color: #94a3b8; 
    --line-opacity: 0.2;

    /* Dimensions */
    --max-width: 1100px;
    --header-height: 70px;
}

/* --- Reset & Base --- */
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'IBM Plex Sans', sans-serif;
    background-color: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.5;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

body.menu-open { overflow: hidden; }
a { text-decoration: none; color: inherit; transition: all 0.2s ease; }
/* Using .u-hidden to avoid Tailwind conflicts */
.u-hidden { display: none !important; }

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

/* --- Header & Nav --- */
.site-header {
    height: var(--header-height);
    background-color:#0D0D0D;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner { display: flex; justify-content: space-between; align-items: center; width: 100%; }

.logo {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    z-index: 101;
}

.nav-menu { display: flex; gap: 32px; align-items: center; }
.nav-menu a { font-size: 0.9rem; color: var(--text-secondary); font-weight: 500; }
.nav-menu a:hover { color: var(--text-primary); }
.nav-menu a.active { color: var(--text-primary); border-bottom: 2px solid var(--accent-color); padding-bottom: 4px; }

.mobile-toggle { display: none; background: none; border: none; cursor: pointer; color: var(--text-primary); z-index: 101; }

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary { 
    background-color: var(--accent-color); 
    color: #fff; 
    border: 1px solid var(--accent-color);
}

.btn-primary:hover { 
    background-color: var(--accent-hover); 
    box-shadow: 0 0 15px var(--accent-glow);
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}
.btn-secondary:hover {
    border-color: var(--text-secondary);
    background-color: rgba(255,255,255,0.05);
}

/* --- Hero --- */
.hero { padding: 80px 0 60px; border-bottom: 1px solid var(--border-color); text-align: center; }
.hero h1 { font-size: 2.75rem; font-weight: 700; margin-bottom: 16px; letter-spacing: -0.03em; }
.hero p { font-size: 1.1rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

/* --- Cards --- */
.main-content { padding: 60px 0; flex-grow: 1; }
.section-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-tertiary); margin-bottom: 24px; font-weight: 700; }

.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 24px; }

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 24px;
    border-radius: 10px; 
    display: flex;
    flex-direction: column;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.card:hover { 
    border-color: var(--accent-color); 
    transform: translateY(-2px);
}
.card h3 { font-size: 1.25rem; font-weight: 600; margin-bottom: 12px; }
.card p { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 24px; flex-grow: 1; }

/* --- Footer --- */
.site-footer { border-top: 1px solid var(--border-color); padding: 60px 0 30px; background-color: var(--bg-body); margin-top: auto; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 48px; }
.footer-brand h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 16px; }
.footer-brand p { color: var(--text-secondary); font-size: 0.9rem; max-width: 300px; line-height: 1.6; }
.footer-col h4 { font-size: 0.8rem; font-weight: 700; color: #fff; margin-bottom: 20px; text-transform: uppercase; letter-spacing: 0.1em; }
.footer-col a { display: block; color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 12px; }
.footer-col a:hover { color: var(--accent-color); }
.footer-bottom { border-top: 1px solid var(--border-color); padding-top: 24px; color: var(--text-tertiary); font-size: 0.85rem; }

/* --- 404 & Archive Specific --- */
.error-page { flex-grow: 1; display: flex; align-items: center; justify-content: center; text-align: center; }
.error-code { font-size: 8rem; font-weight: 700; color: transparent; -webkit-text-stroke: 2px var(--border-active); text-shadow: 0 0 30px var(--accent-glow); margin-bottom: 10px; }

.disclaimer-box { background: rgba(255, 255, 255, 0.03); border: 1px solid var(--border-color); padding: 20px; border-radius: 10px; margin-bottom: 30px; }
.gmail-link { color: var(--accent-color); font-weight: 700; text-decoration: underline; text-underline-offset: 4px; }

.controls-container { background: var(--bg-card); border: 1px solid var(--border-color); padding: 30px; border-radius: 12px; margin-bottom: 30px; }
.filter-group label { display: block; font-size: 0.85rem; font-weight: 700; color: #fff; text-transform: uppercase; margin-bottom: 10px; }
select { width: 100%; background: #000; border: 1px solid var(--border-color); color: #fff; padding: 12px; border-radius: 6px; outline: none; }
select:disabled { opacity: 0.3; cursor: not-allowed; }

.results-header { border-bottom: 1px solid var(--border-color); padding-bottom: 15px; margin-bottom: 25px; }
#results-count { font-weight: 600; color: #fff; font-size: 0.9rem; }

/* Paper Card Specifics */
.paper-card { border-left: 3px solid var(--subject-color, var(--accent-color)); }
.paper-card:hover { border-color: var(--subject-color, var(--accent-color)); box-shadow: 0 4px 20px rgba(0,0,0,0.5); }
.paper-actions { display: flex; flex-direction: column; gap: 10px; margin-top: 20px; }
.action-btn { text-align: center; padding: 10px; background: rgba(255,255,255,0.03); border: 1px solid var(--border-color); border-radius: 6px; font-size: 0.85rem; color: var(--text-secondary); transition: all 0.2s ease; }
.action-btn:hover:not(.disabled) { border-color: var(--subject-color, var(--accent-color)); background: rgba(255,255,255,0.05); color: #fff; }
.action-btn.disabled { opacity: 0.2; cursor: default; pointer-events: none; }
.empty-state { grid-column: 1 / -1; text-align: center; padding: 60px; color: var(--text-tertiary); }

/* --- AUTH / LOGIN STYLES --- */
.auth-page { display: flex; align-items: center; justify-content: center; padding: 60px 24px; flex-grow: 1; }
.auth-card { width: 100%; max-width: 420px; background-color: var(--bg-card); border: 1px solid var(--border-color); border-radius: 12px; padding: 40px; box-shadow: 0 10px 40px rgba(0,0,0,0.5); }
.auth-header { text-align: center; margin-bottom: 32px; }
.auth-header h1 { font-size: 1.75rem; font-weight: 700; margin-bottom: 8px; color: var(--text-primary); }
.auth-header p { color: var(--text-secondary); font-size: 0.95rem; }

.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 8px; font-weight: 500; }
.form-group input { width: 100%; padding: 12px; background-color: #000; border: 1px solid var(--border-color); border-radius: 6px; color: var(--text-primary); font-family: inherit; font-size: 0.95rem; transition: border-color 0.2s; }
.form-group input:focus { outline: none; border-color: var(--accent-color); }

.password-wrapper { position: relative; width: 100%; }
.password-wrapper input { padding-right: 44px; }
.toggle-password { position: absolute; right: 0; top: 0; height: 100%; width: 44px; background: transparent; border: none; color: var(--text-secondary); cursor: pointer; display: flex; align-items: center; justify-content: center; }
.toggle-password:hover { color: var(--text-primary); }

.text-link { font-size: 0.85rem; color: var(--text-secondary); cursor: pointer; display: inline-block; margin-top: 8px; }
.text-link:hover { color: var(--accent-color); }

.btn-full { width: 100%; margin-bottom: 12px; }

.btn-google { background-color: #ffffff; color: #0D0D0D; display: flex; align-items: center; justify-content: center; gap: 10px; border: none; font-weight: 600; }
.btn-google:hover { background-color: #f1f1f1; }

.btn-logout { background-color: transparent; border-color: var(--color-error); color: var(--color-error); width: 100%; }
.btn-logout:hover { background-color: rgba(239, 68, 68, 0.1); box-shadow: 0 0 15px rgba(239, 68, 68, 0.2); }

.message-box { margin-bottom: 20px; padding: 12px; border-radius: 6px; font-size: 0.9rem; display: none; text-align: center; }
.message-box.error { background-color: rgba(239, 68, 68, 0.1); color: var(--color-error); border: 1px solid rgba(239, 68, 68, 0.2); }
.message-box.success { background-color: rgba(16, 185, 129, 0.1); color: var(--color-success); border: 1px solid rgba(16, 185, 129, 0.2); }

.divider { display: flex; align-items: center; text-align: center; margin: 24px 0; color: var(--text-tertiary); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.1em; }
.divider::before, .divider::after { content: ''; flex: 1; border-bottom: 1px solid var(--border-color); }
.divider:not(:empty)::before { margin-right: 16px; }
.divider:not(:empty)::after { margin-left: 16px; }

/* Mobile Menu Logic */
@media (max-width: 768px) {
    .nav-menu { position: fixed; top: 0; left: 0; width: 100%; height: 100vh; background: var(--bg-body); flex-direction: column; justify-content: center; opacity: 0; pointer-events: none; z-index: 99; transition: opacity 0.3s; }
    .nav-menu.active { opacity: 1; pointer-events: all; }
    .mobile-toggle { display: block; z-index: 101; }
}

/* Modal Overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Modal Card */
.modal-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    max-width: 400px;
    width: 90%;
    text-align: center;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.active .modal-card {
    transform: translateY(0);
}

.modal-icon {
    margin-bottom: 20px;
    background: rgba(59, 130, 246, 0.1);
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin-left: auto;
    margin-right: auto;
}

.modal-card h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.modal-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 24px;
}

/* Modal Buttons */
.modal-actions {
    display: flex;
    gap: 12px;
}

.modal-btn {
    flex: 1;
    padding: 12px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: 0.2s;
    text-decoration: none;
    display: inline-block;
}

.modal-btn.btn-secondary {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.modal-btn.btn-secondary:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    
}
        .policy-content { max-width: 800px; margin: 40px auto; color: var(--text-secondary); line-height: 1.8; font-size: 0.95rem; }
        .policy-content h1 { color: var(--text-primary); font-size: 2.5rem; margin-bottom: 10px; }
        .policy-content h2 { color: var(--text-primary); margin: 40px 0 16px; font-size: 1.4rem; border-bottom: 1px solid var(--border-color); padding-bottom: 8px; }
        .policy-content p { margin-bottom: 16px; }
        .policy-content ul { margin-bottom: 24px; padding-left: 20px; }
        .policy-content li { margin-bottom: 8px; }
        .last-updated { font-size: 0.9rem; color: var(--text-tertiary); margin-bottom: 40px; }

                .tools-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }

        .tool-tile {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 25px;
            border-radius: 12px;
            text-decoration: none;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .tool-tile:hover {
            border-color: var(--accent-color);
            transform: translateY(-5px);
            background: var(--bg-card-hover);
        }

        .tool-tile h3 {
            font-size: 1.25rem;
            color: var(--text-primary);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .tool-tile p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 20px;
        }

        .external-icon {
            color: var(--accent-color);
            opacity: 0.6;
            transition: opacity 0.3s;
        }

        .tool-tile:hover .external-icon {
            opacity: 1;
        }

        .tool-tag {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            font-weight: 700;
            color: var(--accent-color);
            background: rgba(98, 218, 240, 0.1);
            padding: 4px 10px;
            border-radius: 4px;
            align-self: flex-start;
        }

        @media (max-width: 600px) {
            .tools-grid {
                grid-template-columns: 1fr;
            }
        }

        .tool-logo {
            width: 48px;
            height: 48px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 10px;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 8px;
            border: 1px solid var(--border-color);
        }

        .tool-logo img {
            width: 100%;
            height: 100%;
            object-fit: contain;
        }

        .tool-tile h3 {
            font-size: 1.2rem;
            color: var(--text-primary);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .tool-tile p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.5;
            margin-bottom: 20px;
            flex-grow: 1; 
        }

        .tool-tag {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            font-weight: 700;
            color: var(--accent-color);
            background: rgba(98, 218, 240, 0.1);
            padding: 4px 10px;
            border-radius: 4px;
            align-self: flex-start;
        }

        .external-icon {
            opacity: 0.4;
        }