/* Modern base design for a landing page — styled so JavaScript can add movement/animations later */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700;800&display=swap');

:root{
	/* basic palette, will be overridden by theme classes */
	--bg: #121828; /* slightly lighter than pure midnight */
	--surface: #1f293b; /* gentle deep blue-gray */
	--text: #e6eef8;
	--muted: rgba(255,255,255,0.65);
	--accent: #6b8db5;
	--card: rgba(255,255,255,0.03);
	--radius: 14px;
}

/* light theme overrides */
.light-theme{
	--bg: #f5f5f5;
	--surface: #ffffff;
	--text: #333333;
	--muted: rgba(0,0,0,0.5);
	--card: rgba(0,0,0,0.05);
	--accent: #6b8db5;
}

/* Adjust hero and related elements for light theme to ensure readability */
.light-theme .hero{
  background: radial-gradient(ellipse at center, #ffffff 0%, #f7fbff 100%);
  color: var(--text);
}
.light-theme .hero .kicker{
  background: linear-gradient(90deg, rgba(124,92,255,0.08), rgba(78,225,163,0.03));
  color: var(--accent);
}
.light-theme .title{color:var(--text)}
.light-theme .lead{color:rgba(0,0,0,0.65)}
.light-theme .btn.secondary{background:transparent;color:rgba(0,0,0,0.7);border:1px solid rgba(0,0,0,0.08);box-shadow:none}
.light-theme .header-controls .login-btn{background:transparent;color:var(--muted);border:1px solid rgba(0,0,0,0.06)}
.light-theme .header-controls .register-btn{background:linear-gradient(90deg,#6b8db5,#7c5cff);color:#fff}


.dark-theme{
	/* explicit for clarity, same as default */
	--bg: #0f172a;
	--surface: #1e293b;
	--text: #e6eef8;
	--muted: rgba(255,255,255,0.65);
	--card: rgba(255,255,255,0.03);
	--accent: #6b8db5;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
	margin:0;
	font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
	background: var(--bg);
	color: var(--text);
	-webkit-font-smoothing:antialiased;
	-moz-osx-font-smoothing:grayscale;
	line-height:1.4;
}

/* Layout container */
.container{
	width: min(1200px, 92%);
	margin: 0 auto;
	padding-top:60px; /* space for fixed header */
}

/* Header */
.site-header{
	position:fixed;
	top:0;left:0;right:0;
	height:60px;
	padding:0 20px;
	display:flex;
	align-items:center;
	justify-content:space-between;
	background:var(--surface);
	z-index:200;
}
.brand{
	display:flex;gap:12px;align-items:center;font-weight:700;font-size:1.05rem;
}
.brand-link{display:flex;align-items:center;text-decoration:none}
.brand-link .brand-name{margin:0}
.brand-name{font-family:'Montserrat',sans-serif;font-size:1.25rem;background:linear-gradient(90deg,#4f46e5,#6ee7b7);-webkit-background-clip:text;color:transparent;}

.brand .logo{display:none /* logo removed */}

.nav{display:flex;gap:18px;align-items:center}
.nav a{color:var(--muted);text-decoration:none;padding:6px 10px;border-radius:8px}
.nav a:hover{color:#fff;background:rgba(255,255,255,0.03)}

/* Hero */
.hero{
	display:flex;flex-direction:column;align-items:center;justify-content:center;padding:64px 0 56px;
	background:radial-gradient(ellipse at center, #0f172a 0%, #03060d 100%);
	text-align:center;
	width:100vw;
	position:relative;
	left:50%;
	right:50%;
	margin-left:-50vw;
	margin-right:-50vw;
}
.hero .intro{max-width:720px}
.kicker{display:inline-block;padding:6px 10px;border-radius:999px;background:linear-gradient(90deg,rgba(124,92,255,0.12),rgba(78,225,163,0.06));color:var(--accent);font-weight:600;margin-bottom:18px}
.title{font-family:'Montserrat',sans-serif;font-size:clamp(2rem,4.5vw,3.4rem);line-height:1.02;margin:0 0 18px;font-weight:800}
.lead{color:var(--muted);font-size:1.05rem;margin-bottom:26px}
.cta-row{display:flex;gap:14px;align-items:center;justify-content:center;margin-top:18px}
.btn{
	padding:12px 22px;border-radius:999px;border:0;cursor:pointer;color:#fff;font-weight:700;background:linear-gradient(90deg,var(--accent),#7c5cff);font-size:1rem;box-shadow:0 10px 30px rgba(99,102,241,0.10);transition:transform .22s ease,box-shadow .22s ease,opacity .18s ease;
}

.btn.primary{background:linear-gradient(90deg,#6b8db5,#7c5cff);box-shadow:0 14px 40px rgba(124,92,255,0.12);display:inline-flex;align-items:center;gap:10px}
.btn.secondary{background:transparent;color:var(--muted);border:1px solid rgba(255,255,255,0.08);box-shadow:none;padding:10px 18px}
.btn:hover{transform:translateY(-4px);box-shadow:0 20px 48px rgba(99,102,241,0.12);opacity:0.98}

.btn .icon-arrow{display:inline-block;flex:0 0 auto;transition:transform .18s cubic-bezier(.2,.9,.22,1);color:inherit}
.btn:hover .icon-arrow{transform:translateX(6px)}
.btn:focus{outline:2px solid rgba(124,92,255,0.18);outline-offset:4px}

@media (max-width:520px){
	.cta-row{flex-direction:column;gap:12px}
	.btn{width:100%;max-width:320px}
}

/* Right visual / mockup */
.hero-visual{
	display:flex;align-items:center;justify-content:center;
}
.device-mock{
	width:420px;height:300px;border-radius:20px;background:linear-gradient(160deg,rgba(255,255,255,0.03),transparent);border:1px solid var(--glass-border);backdrop-filter: blur(8px);box-shadow:0 20px 60px rgba(2,6,23,0.6);display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden
}
.device-mock .screen-placeholder{width:86%;height:78%;border-radius:12px;background:linear-gradient(180deg,#071226 0%, rgba(4,10,20,0.6) 100%);display:flex;align-items:center;justify-content:center;color:var(--muted);font-weight:600}

/* Feature cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;margin:34px 0}
.card{background:var(--card);border:1px solid rgba(0,0,0,0.1);padding:20px;border-radius:16px;box-shadow:0 4px 12px rgba(0,0,0,0.1);transition:transform .28s cubic-bezier(.2,.9,.22,1),box-shadow .28s ease}
.card:hover{transform:translateY(-10px);box-shadow:0 26px 60px rgba(2,6,23,0.7)}
.card h4{margin:0 0 8px}
.card p{margin:0;color:var(--muted);font-size:0.95rem}

/* Footer */
.site-footer{padding:36px 0;border-top:1px solid rgba(255,255,255,0.02);color:var(--muted);font-size:0.95rem}

/* Utility helpers for JS-driven movement: JS will toggle the .is-animated class */
.will-change{will-change:transform,opacity}

/* Floating/oscillating placeholder — JS can toggle .is-animated to start movement */
.js-float{transition:transform .6s ease,opacity .45s ease}
.js-float.is-animated{transform:translateY(-10px) rotate(-1deg)}

.js-fade{opacity:0;transform:translateY(8px);transition:opacity .5s ease,transform .5s ease}
.js-fade.is-animated{opacity:1;transform:none}

.js-scale{transform:scale(.98);opacity:.92;transition:transform .45s cubic-bezier(.2,.9,.22,1),opacity .45s}
.js-scale.is-animated{transform:scale(1);opacity:1}

/* Example named classes JS might target for more complex motion sequences */
.motion-group{position:relative}
.motion-item{opacity:0;transform:translateY(14px);transition:transform .5s ease,opacity .45s ease}
.motion-item.revealed{opacity:1;transform:none}

/* Responsive tweaks */
@media (max-width:980px){
	.hero{grid-template-columns:1fr;gap:28px;padding:48px 0}
	.hero-visual{order:-1}
	.device-mock{width:100%;height:260px}
}
@media (max-width:520px){
	.brand{font-size:0.95rem}
	.nav{display:none}
	.device-mock{height:220px}
	.title{font-size:1.6rem}
}

/* Small helpers */
.muted{color:var(--muted)}
.glass-panel{background:var(--surface);border-radius:var(--radius);padding:14px;border:1px solid rgba(0,0,0,0.1)}

/* App-specific layout for the study assistant */
.grid{display:grid;grid-template-columns:320px 1fr;gap:20px;margin-top:18px}
.main-panel{margin-top:12px}
.main-panel.hidden{display:none}
.form-row{display:flex;gap:10px;margin-top:10px}
.form-row .col{flex:1}
.form-row .col.small{flex:0 0 160px}
label{display:block;font-size:13px;margin-bottom:6px}
textarea, input[type="text"], input[type="password"], input[type="number"], input[type="date"], select{width:100%;padding:10px;border-radius:10px;border:1px solid rgba(255,255,255,0.04);background:transparent;color:inherit}
.output{margin-top:12px}
.diagram{background:#061427;padding:12px;border-radius:8px;overflow:auto;margin-top:10px}
.small{font-size:13px}

/* Auth / user chip */
.user-chip{display:flex;gap:10px;align-items:center;padding:8px 10px;border-radius:999px;background:var(--surface);border:1px solid rgba(0,0,0,0.1)}
.user-name{font-weight:700;color:var(--accent)}

/* Header tweaks */
.site-header h1{font-size:20px;margin:0}

@media (max-width:820px){
	.grid{grid-template-columns:1fr}
	.auth .btn{font-size:0.9rem}
}

/* Accessibility: reduced motion support */
@media (prefers-reduced-motion: reduce){
	.btn, .card, .js-float, .js-fade, .js-scale, .motion-item{transition:none}
}

/* Tabs and auth forms */
.tabs{display:flex;border-bottom:1px solid rgba(0,0,0,0.1);margin-bottom:12px}
.tab{flex:1;padding:8px 0;text-align:center;cursor:pointer;color:var(--muted);font-weight:600;background:transparent;border:none}
.tab.active{color:var(--text);border-bottom:2px solid var(--accent)}
.form-container{display:flex;flex-direction:column;gap:10px}

/* Google button styling */
#googleLoginBtn, #googleRegisterBtn {
  width: 100%;
}

#googleLoginBtn > div, #googleRegisterBtn > div {
  width: 100% !important;
}

.hidden{display:none !important}

/* Header controls */
.header-controls{display:flex;align-items:center;gap:8px}
.icon-btn{background:transparent;border:none;color:var(--muted);font-size:1.2rem;padding:6px;border-radius:8px;cursor:pointer;transition:background .2s,color .2s}
.icon-btn:hover{background:rgba(255,255,255,0.1);color:#fff}

/* layout and navigation for after-login menu */
.side-nav{position:fixed;top:0;left:0;bottom:0;width:220px;display:flex;flex-direction:column;align-items:flex-start;padding-top:40px;padding-left:16px;padding-right:16px;background:#1e1e2e;transition:transform .2s ease;transform:translateX(-100%)}
.side-nav.visible{transform:translateX(0)}
.sidebar-brand{margin-bottom:24px;padding-left:4px}
.logo-text{font-size:1.4rem;font-weight:800;color:#ff5700}
.nav-link{width:100%;display:flex;align-items:center;gap:10px;color:var(--muted);text-decoration:none;padding:10px 12px;border-radius:8px;font-size:0.95rem;transition:background .2s}
.nav-link .icon{font-size:1.2rem}
.nav-link:hover, .nav-link.active{background:rgba(255,255,255,0.1);color:#fff}
.main-content{margin-left:0;transition:margin-left .2s}
.side-nav.visible ~ .main-content{margin-left:220px}

/* shift header when sidebar active */
body.sidebar-open header{padding-left:220px;transition:padding-left .2s}
body.logged-in .site-header .brand{visibility:hidden;opacity:0;transition:opacity .2s;pointer-events:none}

/* small utilities */
.divider{text-align:center;margin:12px 0;color:var(--muted);font-size:12px}
.centered{max-width:400px;margin:60px auto}
.form-card h2{text-align:center;margin-bottom:24px}
.help-panel{position:sticky;top:20px}
.actions{margin-top:8px;display:flex;gap:8px}
.side-nav{width:200px;flex-shrink:0;display:flex;flex-direction:column;gap:10px;padding:20px;background:rgba(255,255,255,0.05);border-right:1px solid rgba(0,0,0,0.05)}
.side-nav.hidden{display:none}
.nav-link{display:flex;align-items:center;gap:6px;color:var(--muted);text-decoration:none;padding:8px 12px;border-radius:8px;transition:background .2s}
.nav-link:hover{background:rgba(255,255,255,0.08);color:var(--text)}

/* small utilities */
.divider{text-align:center;margin:12px 0;color:var(--muted);font-size:12px}
.centered{max-width:400px;margin:60px auto}
.form-card h2{text-align:center;margin-bottom:24px}
.help-panel{position:sticky;top:20px}
.actions{margin-top:8px;display:flex;gap:8px}

/* User menu */
.user-menu{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:8px;background:rgba(0,0,0,0.1)}
.user-menu.hidden{display:none !important}
.current-user{font-weight:600;color:var(--muted);font-size:14px}

/* extra helpers */
.example-box{margin-top:12px}

/* Section spacing for landing page */
.section{padding:60px 0}
.section h2{margin-bottom:20px;font-size:1.8rem}

/* stats cards gradient numbers */
.stats .card h4{font-size:2rem;font-weight:800;background:linear-gradient(90deg,rgba(124,92,255,1),rgba(78,225,163,1));-webkit-background-clip:text;color:transparent}

/* ensure visuals are centered */
.hero-visual .device-mock .screen-placeholder{color:var(--muted);font-weight:600}

/* keep footer links inline */
.site-footer .cards{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:12px}

/* hide landing sections when user is logged-in (except features) */
body.logged-in .hero,
body.logged-in .stats { display: none !important; }

/* simple nav styles for landing header */
.site-header .nav{display:flex;gap:18px;align-items:center}
.site-header .nav a{color:var(--muted);text-decoration:none;padding:6px 10px;border-radius:8px}
.site-header .nav a:hover{color:#fff;background:rgba(255,255,255,0.03)}

/* header login/register buttons */
.header-controls .login-btn,
.header-controls .register-btn{margin-right:8px;text-decoration:none}
.header-controls .register-btn{background:var(--accent);color:#fff}
.header-controls .login-btn{background:transparent;color:var(--muted);border:1px solid var(--muted)}
/* typing cursor blink */
.typing-cursor{display:inline-block;position:relative;width:8px;height:1em;margin-left:8px;vertical-align:middle}
.typing-cursor::after{content:'';position:absolute;left:50%;top:0;transform:translateX(-50%);width:1px;height:0.95em;background:currentColor;border-radius:1px;animation:none;opacity:0.0;transition:opacity .12s ease, transform .12s ease}
.typing-cursor.typing::after{animation:cursorPulse 1.2s ease-in-out infinite;opacity:1}

/* Nuevo parpadeo: pulso suave con pequeño desplazamiento vertical */
@keyframes cursorPulse{
	0%{opacity:0; transform:translateY(0) scaleY(1)}
	25%{opacity:1; transform:translateY(-2px) scaleY(1.15)}
	60%{opacity:1; transform:translateY(0) scaleY(1)}
	100%{opacity:0; transform:translateY(0) scaleY(1)}
}

/* Hacer el pulso del cursor ligeramente más lento */
.typing-cursor.typing::after{animation-duration:1.6s}

/* Ocultar cursor cuando la escritura termina */
.typing-cursor.hidden::after{opacity:0;transform:translateY(0) scaleY(1);transition:opacity .18s ease, transform .18s ease;animation:none}

/* cookie banner */
.cookie-banner{position:fixed;bottom:0;left:0;right:0;background:var(--surface);padding:12px 20px;display:flex;justify-content:space-between;align-items:center;box-shadow:0 -2px 8px rgba(0,0,0,0.2);z-index:500}
.cookie-banner span{font-size:0.95rem;color:var(--text)}
.cookie-banner button{margin-left:12px}
.cookie-banner.hidden{display:none}

/* auth page two-column layout */
.auth-container{display:flex;min-height:80vh;}
.auth-left{flex:1;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1e3a8a,#3b82f6);color:#fff;padding:40px;}
.auth-left .big-logo{max-width:360px;text-align:center}
.auth-left .big-logo h2{font-size:2.8rem;margin-bottom:0.5rem}
.auth-left .big-logo h2.brand-name{background:linear-gradient(90deg,#4f46e5,#6ee7b7);-webkit-background-clip:text;color:transparent}
.auth-left .big-logo h3{margin:10px 0;color:#a5b4fc}
.auth-left p{margin:8px 0}
.auth-right{flex:1;display:flex;align-items:center;justify-content:center;padding:40px;background:#0e1015}
.auth-right .form-card{width:100%;max-width:420px;background:var(--surface);padding:30px;border-radius:16px;box-shadow:0 8px 24px rgba(0,0,0,0.2)}
.auth-right .form-card h2{color:var(--text);}
.auth-right .form-card .btn{width:100%}

/* End of styles.css */