:root{
	--bg: #f7f8fb;
	--card: #ffffff;
	--muted: #6b7280;
	--text: #111827;
	--accent: #e61e4c;
	--danger: #ef4444;
	--radius: 12px;
	--container: 1100px;
}

/* Light theme palette: these variables apply ONLY when light theme is active */
:root[data-theme="light"]{
	/* Base colors */
	--clr-dark-a0: #000000;
	--clr-light-a0: #ffffff;

	/* Theme primary colors */
	--clr-primary-a0: #d9255e;
	--clr-primary-a10: #bf2553;
	--clr-primary-a20: #a52449;
	--clr-primary-a30: #8c223f;
	--clr-primary-a40: #742035;
	--clr-primary-a50: #5d1d2b;

	/* Theme surface colors */
	--clr-surface-a0: #ffffff;
	--clr-surface-a10: #f0f0f0;
	--clr-surface-a20: #e1e1e1;
	--clr-surface-a30: #d3d3d3;
	--clr-surface-a40: #c5c5c5;
	--clr-surface-a50: #b6b6b6;

	/* Theme tonal surface colors */
	--clr-surface-tonal-a0: #ffecee;
	--clr-surface-tonal-a10: #f0dfe1;
	--clr-surface-tonal-a20: #e1d3d5;
	--clr-surface-tonal-a30: #d3c7c8;
	--clr-surface-tonal-a40: #c5bbbc;
	--clr-surface-tonal-a50: #b7afaf;

	/* Success / Warning / Danger / Info */
	--clr-success-a0: #1b7f5c;
	--clr-success-a10: #28be8a;
	--clr-success-a20: #58dbad;
	--clr-warning-a0: #b8871f;
	--clr-warning-a10: #dfae44;
	--clr-warning-a20: #ebca85;
	--clr-danger-a0: #b13535;
	--clr-danger-a10: #d06262;
	--clr-danger-a20: #e29d9d;
	--clr-info-a0: #1e56a3;
	--clr-info-a10: #347ada;
	--clr-info-a20: #74a4e6;

	/* Map app tokens to the light palette */
	--bg: var(--clr-surface-a0);
	--card: var(--clr-surface-a10);
	--muted: var(--clr-surface-a40);
	--text: var(--clr-dark-a0);
	--accent: var(--clr-primary-a0);
	--accent-2: var(--clr-primary-a20);
	--danger: var(--clr-danger-a10);
}

/* Dark theme palette: apply these variables ONLY when dark theme is active */
:root[data-theme="dark"]{
	/* Base colors */
	--clr-dark-a0: #000000;
	--clr-light-a0: #ffffff;

	/* Theme primary colors */
	--clr-primary-a0: #d9255e;
	--clr-primary-a10: #e1496e;
	--clr-primary-a20: #e8647f;
	--clr-primary-a30: #ee7c90;
	--clr-primary-a40: #f393a1;
	--clr-primary-a50: #f7a9b3;

	/* Theme surface colors (dark) */
	--clr-surface-a0: #000000;
	--clr-surface-a10: #1e1e1e;
	--clr-surface-a20: #353535;
	--clr-surface-a30: #4e4e4e;
	--clr-surface-a40: #696969;
	--clr-surface-a50: #858585;

	/* Theme tonal surface colors */
	--clr-surface-tonal-a0: #1b0c0e;
	--clr-surface-tonal-a10: #2f2325;
	--clr-surface-tonal-a20: #463b3c;
	--clr-surface-tonal-a30: #5e5355;
	--clr-surface-tonal-a40: #776e6f;
	--clr-surface-tonal-a50: #90898a;

	/* Success / Warning / Danger / Info */
	--clr-success-a0: #22946e;
	--clr-success-a10: #47d5a6;
	--clr-success-a20: #9ae8ce;
	--clr-warning-a0: #a87a2a;
	--clr-warning-a10: #d7ac61;
	--clr-warning-a20: #ecd7b2;
	--clr-danger-a0: #9c2121;
	--clr-danger-a10: #d94a4a;
	--clr-danger-a20: #eb9e9e;
	--clr-info-a0: #21498a;
	--clr-info-a10: #4077d1;
	--clr-info-a20: #92b2e5;

	/* Map app tokens to dark palette */
	--bg: var(--clr-surface-a0);
	--card: var(--clr-surface-a10);
	--muted: var(--clr-surface-a40);
	--text: var(--clr-light-a0);
	--accent: var(--clr-primary-a0);
	--accent-2: var(--clr-primary-a20);
	--danger: var(--clr-danger-a10);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
	margin:0;
	font-family: Inter, Segoe UI, Roboto, Arial, sans-serif;
	background: var(--bg);
	color: var(--text);
}
/* Smooth transitions for theme changes */
body, .auth-card, .hero, .feature, input, .switch-track, .switch-knob, .tab, .btn, .benefits li{
    transition: background-color 240ms ease, color 240ms ease, border-color 240ms ease, box-shadow 240ms ease, transform 240ms ease;
}
.switch-option{transition: color 240ms ease}
.container{width:100%;max-width:100%;margin:0 auto;padding:20px}
.site-header{background:transparent;padding:14px 0}
.header-inner{display:flex;align-items:center;justify-content:space-between}
.logo{margin:0;font-size:1.1rem}
.header-nav a{color:var(--muted);text-decoration:none;margin-left:16px}

/* Layout blocks */
.main-grid{display:grid;grid-template-columns:1fr 380px;gap:28px;align-items:start;padding-top:10px}
.hero{padding:28px;border-radius:var(--radius);background:linear-gradient(180deg,#fff,#fbfdff);box-shadow:0 6px 18px rgba(15,23,42,0.04)}
.hero h2{margin:0 0 8px;font-size:1.6rem}
.hero p{margin:0 0 12px;color:var(--muted)}
.benefits{display:flex;gap:12px;padding:0;margin:16px 0 0;list-style:none}
.benefits li{background:#eef2ff;padding:8px 12px;border-radius:8px;color:#1e3a8a;font-size:0.9rem}

/* Auth / login card */
.auth-card{background:var(--card);border-radius:12px;padding:18px;box-shadow:0 6px 18px rgba(15,23,42,0.06);max-width:480px;margin:0 auto}
.auth-card h2{font-size:1.25rem;margin:0 0 8px}
.auth-card p{margin:0 0 14px;color:var(--muted)}
.tabs{display:flex;gap:8px;margin-bottom:12px}
.tab{flex:1;padding:10px;border-radius:8px;border:1px solid var(--clr-surface-a10);background:var(--clr-surface-a10);cursor:pointer;}
.tab.active{background:linear-gradient(90deg,var(--accent),#b8163f);color:var(--text)}

/* Animated toggle switch for auth mode (labels are inside the switch) */
.mode-switch{display:flex;align-items:center;gap:12px;justify-content:center;width:100%}
.switch{background:transparent;border:0;padding:0;cursor:pointer;display:block;width:100%}
.switch:focus{outline:none}
.switch:focus-visible{outline:2px solid rgba(0,0,0,0.08);outline-offset:2px}
.switch-track{width:100%;height:40px;background:var(--clr-surface-a20);border-radius:999px;display:flex;align-items:center;position:relative;padding:4px;box-sizing:border-box}
.switch-option{flex:1;text-align:center;font-size:0.95rem;z-index:2;pointer-events:none}
.switch-option.login{color:#fff}
.switch-option.register{color:var(--muted)}
.switch-knob{position:absolute;left:4px;top:4px;width:calc(50% - 8px);height:calc(100% - 8px);border-radius:999px;background:linear-gradient(90deg,var(--accent),var(--accent-2));box-shadow:0 6px 16px rgba(2,6,23,0.12);transition:transform 220ms cubic-bezier(.2,.9,.2,1),background-color 180ms ease;z-index:1}
.switch.on .switch-knob{transform:translateX(104%)}
.switch.on .switch-option.login{color:var(--muted)}
.switch.on .switch-option.register{color:#fff}

.form{display:flex;flex-direction:column;gap:10px}
.auth-card input{background:var(--clr-surface-a20);border:1px solid rgba(15,23,42,0.06);padding:12px 14px;border-radius:8px;font-size:0.95rem;width:100%;color:var(--text);caret-color:var(--text)}
.auth-card input::placeholder{color:var(--clr-surface-a50)}
.auth-card input:focus{outline:none;border-color:var(--accent);box-shadow:0 8px 20px rgba(230,30,76,0.06)}
.btn{padding:10px 12px;border-radius:8px;border:0;cursor:pointer}
.auth-card .btn{width:100%;padding:12px 14px}
.btn.primary{background:var(--accent);color:#fff}
.btn.secondary{background:var(--card);border:1px solid var(--text);color:var(--text)}
.btn.logout{background:var(--clr-primary-a0);color:#fff;border:1px solid transparent}
.icon-btn.list{background-color: var(--clr-surface-a20);color:var(--text)}
.error-message{color:var(--danger);font-size:0.9rem;min-height:1.2em;margin-top:6px}

form{display:flex;flex-direction:column;gap:16px}
.features{padding:28px 20px}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:12px}
.feature{background:#fff;border-radius:10px;padding:16px;box-shadow:0 6px 18px rgba(2,6,23,0.03)}

/* Drive-like file manager */
.drive-shell{display:grid;grid-template-columns:240px 1fr 260px;gap:16px;min-height:100%}
.drive-sidebar,.drive-preview{background:var(--card);border-radius:12px;padding:14px;box-shadow:0 6px 16px rgba(2,6,23,0.04);height:100%;overflow:auto}
.drive-section + .drive-section{margin-top:16px}
.drive-section-title{font-size:0.72rem;letter-spacing:0.08em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.drive-nav{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:4px}
.drive-nav li{padding:8px 10px;border-radius:8px;color:var(--text);cursor:pointer}
.drive-nav li.active{background:var(--clr-surface-a20);font-weight:600}
.folder-tree{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:4px}
.tree-node{display:block}
.tree-item{display:flex;align-items:center;gap:8px;padding:6px 8px;border-radius:8px;color:var(--text);cursor:pointer}
.tree-item:hover{background:var(--clr-surface-a20)}
.tree-node.active > .tree-item{background:var(--clr-surface-a20);font-weight:600}
.tree-caret{width:10px;height:10px;display:inline-block;position:relative;flex:0 0 10px}
.tree-caret::before{content:"";display:block;width:6px;height:6px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(-45deg);margin:1px 0 0 1px}
.tree-node.expanded > .tree-item .tree-caret::before{transform:rotate(45deg);margin:0 0 0 1px}
.tree-caret.empty::before{border-color:transparent}
.tree-icon{width:18px;height:18px;display:inline-grid;place-items:center;flex:0 0 18px}
.tree-icon img{width:18px;height:18px;object-fit:contain;transition:filter 180ms ease}
:root[data-theme="dark"] .tree-icon img{filter:invert(1)}
.tree-label{flex:1;min-width:0}
.tree-children{list-style:none;margin:4px 0 0 18px;padding:0;display:flex;flex-direction:column;gap:4px;max-height:1200px;opacity:1;overflow:hidden;transform:translateY(0);transition:max-height 220ms ease,opacity 180ms ease,transform 220ms ease}
.tree-node.collapsed > .tree-children{max-height:0;opacity:0;transform:translateY(-4px)}
.drive-main{display:flex;flex-direction:column;gap:12px;min-width:0}
.drive-toolbar{display:flex;align-items:center;gap:12px;background:var(--card);border-radius:12px;padding:10px 12px;box-shadow:0 4px 14px rgba(2,6,23,0.04)}
.drive-breadcrumbs{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:0.95rem;flex:1;min-width:0;overflow:hidden}
.drive-breadcrumbs .crumb{color:var(--text);white-space:nowrap}
.drive-breadcrumbs .crumb.current{color:var(--text);font-weight:600}
.drive-breadcrumbs .crumb-sep{color:var(--muted)}
.drive-toolbar-right{display:flex;align-items:center;gap:10px}
.drive-search{width:240px}
.drive-search input{width:100%;padding:8px 12px;border-radius:999px;border:1px solid rgba(15,23,42,0.08);background:var(--clr-surface-a10);color:var(--text)}
.drive-view{display:flex;gap:6px}
.icon-btn{border:1px solid rgba(15,23,42,0.08);background:var(--clr-surface-a10);border-radius:8px;padding:6px 10px;cursor:pointer}
.icon-btn.active{background:var(--accent);color:#fff;border-color:transparent}
.drive-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.drive-filters{display:flex;gap:8px;flex-wrap:wrap}
.drive-chip{border:1px solid rgba(15,23,42,0.08);background:var(--card);border-radius:999px;padding:6px 12px;font-size:0.85rem;color:var(--text);cursor:pointer}
.drive-chip.active{background:var(--clr-surface-tonal-a20);border-color:transparent}
.drive-cta{display:flex;gap:8px}
.drive-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:14px}
.drive-tile{background:var(--card);border:1px solid rgba(15,23,42,0.06);border-radius:10px;padding:10px;display:flex;flex-direction:column;gap:8px;min-height:160px}
.drive-tile.selected{outline:2px solid rgba(37,99,235,0.35);background:var(--clr-surface-tonal-a0)}
.tile-thumb{height:90px;border-radius:8px;display:flex;align-items:flex-end;justify-content:flex-end;padding:8px;font-size:0.75rem;color:var(--muted);background:var(--clr-surface-a20)}
.tile-thumb.folder{background:linear-gradient(180deg,#fef3c7,#fde68a)}
.tile-thumb.image{background:linear-gradient(180deg,#e0f2fe,#bae6fd)}
.tile-thumb.doc{background:linear-gradient(180deg,#e0e7ff,#c7d2fe)}
.tile-meta{display:flex;flex-direction:column;gap:4px}
.tile-name{font-weight:600;font-size:0.92rem}
.tile-sub{color:var(--muted);font-size:0.8rem}
.preview-card{background:var(--clr-surface-a10);border-radius:10px;padding:12px;margin-bottom:12px}
.preview-title{font-weight:600;margin-bottom:8px}
.preview-body{display:flex;flex-direction:column;gap:8px;color:var(--muted)}
.preview-row{display:flex;justify-content:space-between;gap:8px;font-size:0.85rem}
.preview-label{color:var(--muted)}
.preview-value{color:var(--text)}
.preview-empty{border:1px dashed rgba(15,23,42,0.15);border-radius:8px;padding:18px;text-align:center}

.drive-preview .preview-card:last-child{margin-bottom:0}

.sessions-page{max-width:1120px;margin:0 auto;padding:18px 12px 44px}
.sessions-hero{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:16px}
.sessions-copy{min-width:0}
.sessions-back{display:inline-flex;align-items:center;color:var(--muted);text-decoration:none;font-size:.9rem;margin-bottom:12px}
.sessions-back:hover{color:var(--text)}
.sessions-back::before{content:"";width:8px;height:8px;border-left:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg);margin-right:8px}
.sessions-copy h2{font-size:2rem;line-height:1.1;margin:0 0 8px}
.sessions-copy p{margin:0;color:var(--muted)}
.sessions-summary{display:grid;grid-template-columns:repeat(2,104px);gap:10px}
.sessions-summary div{background:var(--card);border:1px solid rgba(127,127,127,.16);border-radius:10px;padding:14px;box-shadow:0 6px 16px rgba(2,6,23,.04)}
.sessions-summary strong{display:block;font-size:1.6rem;line-height:1;color:var(--text)}
.sessions-summary span{display:block;margin-top:6px;color:var(--muted);font-size:.82rem}
.sessions-toolbar{display:flex;align-items:center;justify-content:space-between;gap:14px;background:var(--card);border:1px solid rgba(127,127,127,.16);border-radius:10px;padding:14px 16px;margin-bottom:12px;box-shadow:0 6px 16px rgba(2,6,23,.04)}
.sessions-toolbar strong{display:block;margin-bottom:3px}
.sessions-toolbar span{display:block;color:var(--muted);font-size:.9rem}
.sessions-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.sessions-list{display:flex;flex-direction:column;gap:10px}
.session-row{display:grid;grid-template-columns:48px minmax(0,1fr) minmax(420px,.9fr);align-items:center;gap:14px;background:var(--card);border:1px solid rgba(127,127,127,.16);border-radius:10px;padding:14px 16px;box-shadow:0 6px 16px rgba(2,6,23,.04)}
.session-row.current{border-color:rgba(217,37,94,.55);box-shadow:0 10px 24px rgba(217,37,94,.12)}
.session-device-icon{width:48px;height:48px;border-radius:10px;background:var(--clr-surface-a20);display:grid;place-items:center}
.session-device-icon span{width:24px;height:17px;border:2px solid var(--text);border-radius:4px;position:relative}
.session-device-icon span::after{content:"";position:absolute;left:6px;right:6px;bottom:-7px;height:2px;background:var(--text);border-radius:999px}
.session-title-line{display:flex;align-items:center;gap:8px;min-width:0}
.session-title-line strong{font-size:1rem}
.session-agent{margin-top:5px;color:var(--muted);font-size:.88rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.session-badge{display:inline-flex;align-items:center;height:24px;padding:0 8px;border-radius:999px;background:var(--clr-surface-tonal-a20);color:var(--text);font-size:.78rem}
.session-meta{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:0}
.session-meta div{min-width:0}
.session-meta dt{color:var(--muted);font-size:.74rem;margin-bottom:4px}
.session-meta dd{margin:0;color:var(--text);font-size:.86rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sessions-empty{background:var(--card);border:1px dashed rgba(127,127,127,.28);border-radius:10px;padding:26px;text-align:center;color:var(--muted)}

@media(max-width:1200px){
	.drive-shell{grid-template-columns:220px 1fr}
	.drive-preview{display:none}
}

@media(max-width:900px){
	.drive-shell{grid-template-columns:1fr}
	.drive-sidebar{order:2}
	.drive-toolbar{flex-direction:column;align-items:stretch}
	.drive-toolbar-right{width:100%;justify-content:space-between}
	.drive-search{width:100%}
	.sessions-page{padding:10px 10px 32px}
	.sessions-hero{align-items:stretch;flex-direction:column}
	.sessions-copy h2{font-size:1.55rem}
	.sessions-summary{grid-template-columns:repeat(2,minmax(0,1fr))}
	.sessions-toolbar{align-items:stretch;flex-direction:column}
	.sessions-actions,.sessions-actions form,.sessions-actions .btn{width:100%}
	.session-row{grid-template-columns:42px minmax(0,1fr);align-items:start}
	.session-device-icon{width:42px;height:42px}
	.session-meta{grid-column:1 / -1;grid-template-columns:repeat(2,minmax(0,1fr));padding-top:4px}
	.session-agent{white-space:normal;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
}

@media(max-width:520px){
	.sessions-summary div{padding:12px}
	.sessions-toolbar{padding:13px}
	.session-row{padding:13px}
	.session-meta{grid-template-columns:1fr}
	.session-meta dd{white-space:normal;overflow-wrap:anywhere}
}

.site-footer{padding:20px 0;text-align:center;color:var(--muted);font-size:0.9rem}

@media(max-width:900px){
	.main-grid{grid-template-columns:1fr;}
	.feature-grid{grid-template-columns:1fr}
}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* utility */
.hidden{display:none}

/* Theme toggle button */
.theme-switch{background:transparent;border:0;padding:0;cursor:pointer;display:inline-flex;align-items:center}
.theme-track{width:72px;height:34px;background:var(--clr-surface-a20);border-radius:999px;display:flex;align-items:center;position:relative;padding:4px;box-sizing:border-box}
.theme-option{flex:1;text-align:center;font-size:14px;z-index:2;pointer-events:none;color:var(--muted);transition:color 180ms ease}
.theme-option.light{color:#fff;position:absolute;left:8px;}
.theme-option.dark{color:var(--muted);position:absolute;right:8px;}
.theme-knob{position:absolute;left:4px;top:4px;width:calc(50% - 8px);height:calc(100% - 8px);border-radius:999px;background:linear-gradient(90deg,var(--accent),var(--accent-2));display:flex;align-items:center;justify-content:center;font-size:16px;box-shadow:0 4px 12px rgba(2,6,23,0.12);transition:transform 220ms cubic-bezier(.2,.9,.2,1),background-color 180ms ease,color 180ms ease;z-index:1}
.theme-switch.on .theme-knob{transform:translateX(128%)}
.theme-switch.on .theme-option.light{color:var(--muted)}
.theme-switch.on .theme-option.dark{color:#fff}
.theme-switch:focus-visible .theme-track{outline:2px solid rgba(0,0,0,0.08);outline-offset:2px}