*{box-sizing:border-box}
:root{--bg:#06101f;--panel:#0b1b31;--panel-2:#102642;--line:rgba(255,255,255,.09);--text:#f5f8ff;--muted:#aab8cd;--accent:#45a8ff;--accent-2:#1d7ed7;--success:#26c281;--warning:#f4a742;--danger:#ff6b6b;--shadow:0 18px 50px rgba(0,0,0,.25)}
html{scroll-behavior:smooth}
body{margin:0;min-height:100vh;background:radial-gradient(circle at top right,rgba(38,130,220,.18),transparent 28rem),linear-gradient(180deg,#071428 0%,var(--bg) 100%);color:var(--text);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit}
.topbar{position:sticky;top:0;z-index:100;display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.8rem clamp(1rem,4vw,2rem);background:rgba(6,16,31,.9);border-bottom:1px solid var(--line);backdrop-filter:blur(18px)}
.app-brand{display:flex;align-items:center;gap:.7rem}.app-brand strong,.app-brand small{display:block}.app-brand small{color:var(--muted);margin-top:.1rem}
.brand-mark{width:4rem;height:4rem;display:grid;place-items:center;border-radius:1.2rem;background:linear-gradient(135deg,var(--accent),#2653dd);box-shadow:0 12px 30px rgba(41,137,232,.28);font-weight:900;letter-spacing:.08em}
.brand-mark.small{width:2.7rem;height:2.7rem;border-radius:.85rem;font-size:.85rem}
.logout-btn{padding:.65rem .9rem;border:1px solid var(--line);border-radius:.8rem;color:var(--muted)}
.page-shell{width:min(1100px,calc(100% - 2rem));margin:0 auto;padding:2rem 0 7rem}
.hero-panel,.page-heading,.content-card,.filter-bar{background:linear-gradient(145deg,rgba(16,38,66,.95),rgba(8,25,46,.95));border:1px solid var(--line);border-radius:1.4rem;box-shadow:var(--shadow)}
.hero-panel,.page-heading{padding:clamp(1.4rem,4vw,3rem)}
.hero-panel h1,.page-heading h1{margin:0;line-height:1.08;font-size:clamp(2rem,7vw,4rem)}
.hero-panel p,.page-heading p{color:var(--muted);line-height:1.7}
.eyebrow{margin:0 0 .5rem!important;color:var(--accent)!important;font-size:.78rem;font-weight:800;letter-spacing:.16em;text-transform:uppercase}
.menu-grid,.stats-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem;margin-top:1rem}
.menu-card,.stat-card{padding:1.4rem;background:rgba(11,27,49,.92);border:1px solid var(--line);border-radius:1.25rem}
.menu-card{min-height:220px;transition:transform .2s ease,border-color .2s ease}
.menu-card:hover{transform:translateY(-4px);border-color:rgba(69,168,255,.55)}
.menu-icon{width:3rem;height:3rem;display:grid;place-items:center;border-radius:.9rem;background:rgba(69,168,255,.12);color:var(--accent);font-size:1.6rem}
.menu-card h2{margin:1rem 0 .5rem;font-size:1.15rem}.menu-card p,.helper-text{color:var(--muted);line-height:1.6}
.stat-card strong{display:block;font-size:2rem}.stat-card span{color:var(--muted)}
.content-card,.filter-bar{margin-top:1rem;padding:1.25rem}
.form-stack{display:grid;gap:1rem}.form-stack label,.filter-bar label{display:grid;gap:.45rem;color:var(--muted);font-weight:700}
input,textarea,select{width:100%;padding:.9rem 1rem;color:var(--text);background:rgba(4,13,25,.85);border:1px solid var(--line);border-radius:.9rem;outline:none}
input:focus,textarea:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(69,168,255,.12)}
.primary-btn,.danger-btn{min-height:3rem;padding:.8rem 1.1rem;color:white;border:0;border-radius:.9rem;font-weight:800;cursor:pointer}
.primary-btn{background:linear-gradient(135deg,var(--accent),var(--accent-2))}
.danger-btn{background:rgba(255,107,107,.15);color:#ffd5d5;border:1px solid rgba(255,107,107,.3)}
.filter-bar{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}
.vocabulary-list,.category-list{display:grid;gap:.7rem;margin-top:1rem}
.vocabulary-item{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:.8rem;padding:.8rem;background:rgba(11,27,49,.94);border:1px solid var(--line);border-radius:1rem}
.audio-btn{width:2.7rem;height:2.7rem;border:0;border-radius:.8rem;background:rgba(69,168,255,.14);cursor:pointer}
.vocabulary-text{min-width:0}.vocabulary-text strong,.vocabulary-text span,.vocabulary-text small{display:block}.vocabulary-text strong{overflow-wrap:anywhere}.vocabulary-text span{margin-top:.22rem;color:#d9e3f1}.vocabulary-text small{margin-top:.28rem;color:var(--muted)}
.item-actions{display:grid;gap:.35rem;justify-items:end}.status-btn{padding:.55rem .7rem;border:0;border-radius:999px;font-size:.78rem;font-weight:800;cursor:pointer}
.status-btn.pending{color:#2d1c00;background:var(--warning)}.status-btn.learned{color:#001b10;background:var(--success)}
.mini-delete{border:0;background:transparent;color:#ffaaaa;font-size:.75rem;cursor:pointer}
.inline-form{display:grid;grid-template-columns:1fr auto;gap:.7rem}
.category-row{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:1rem;background:rgba(11,27,49,.94);border:1px solid var(--line);border-radius:.95rem}
.category-row strong,.category-row span{display:block}.category-row span{margin-top:.25rem;color:var(--muted)}
.empty-state{padding:1.2rem;text-align:center;color:var(--muted);background:rgba(11,27,49,.85);border:1px dashed var(--line);border-radius:1rem}
.text-link{display:inline-block;margin-left:.35rem;color:var(--accent);font-weight:800}
.back-to-top{position:fixed;right:1rem;bottom:5.4rem;z-index:120;width:3.1rem;height:3.1rem;display:grid;place-items:center;border:1px solid rgba(255,255,255,.15);border-radius:50%;color:white;background:linear-gradient(135deg,var(--accent),var(--accent-2));box-shadow:0 12px 30px rgba(0,0,0,.28);opacity:0;visibility:hidden;transform:translateY(.7rem);transition:.2s ease;cursor:pointer}
.back-to-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.mobile-nav{position:fixed;left:50%;bottom:.8rem;z-index:110;display:none;width:min(560px,calc(100% - 1rem));grid-template-columns:repeat(4,1fr);transform:translateX(-50%);background:rgba(8,24,43,.94);border:1px solid var(--line);border-radius:1rem;backdrop-filter:blur(18px);box-shadow:var(--shadow);overflow:hidden}
.mobile-nav a{padding:.85rem .35rem;text-align:center;color:var(--muted);font-size:.78rem;font-weight:800}
.auth-page{display:grid;place-items:center;padding:1rem}.auth-card{width:min(430px,100%);padding:1.5rem;background:rgba(11,27,49,.96);border:1px solid var(--line);border-radius:1.4rem;box-shadow:var(--shadow)}
.auth-card h1{margin-bottom:.4rem}.auth-card>p{color:var(--muted)}
.alert{margin:1rem 0;padding:.85rem;border-radius:.8rem}.alert-error{color:#ffd6d6;background:rgba(255,107,107,.13);border:1px solid rgba(255,107,107,.3)}.alert-success{color:#cdfbe8;background:rgba(38,194,129,.13);border:1px solid rgba(38,194,129,.3)}
@media(max-width:760px){.page-shell{width:min(100% - 1rem,680px);padding-top:1rem}.menu-grid,.stats-grid,.filter-bar{grid-template-columns:1fr}.menu-card{min-height:auto}.mobile-nav{display:grid}.vocabulary-item{grid-template-columns:auto 1fr}.item-actions{grid-column:2;justify-items:start;grid-template-columns:auto auto;align-items:center}.app-brand small{display:none}.back-to-top{right:.75rem}}
@media(max-width:430px){.topbar{padding-inline:.75rem}.hero-panel,.page-heading,.content-card,.filter-bar{border-radius:1rem}.inline-form{grid-template-columns:1fr}.category-row{align-items:flex-start;flex-direction:column}}

/* =========================================================
   MEJORA VISUAL DE BOTONES
   Crear, Estudiar y Categorías
   ========================================================= */

.create-panel,
.category-create-card {
    overflow: hidden;
}

.premium-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
}

.action-btn {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.85rem;
    min-height: 74px;
    padding: 0.95rem 1rem;
    color: var(--text);
    border: 1px solid var(--line);
    border-radius: 1rem;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.16);
    overflow: hidden;
    cursor: pointer;
    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease,
        border-color 0.2s ease;
}

.action-btn::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
        120deg,
        transparent 20%,
        rgba(255, 255, 255, 0.08),
        transparent 80%
    );
    transform: translateX(-100%);
    transition: transform 0.45s ease;
}

.action-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 30px rgba(0, 0, 0, 0.24);
}

.action-btn:hover::after {
    transform: translateX(100%);
}

.action-btn-translate {
    background:
        linear-gradient(135deg, rgba(69, 168, 255, 0.22), rgba(29, 126, 215, 0.1)),
        rgba(7, 25, 45, 0.95);
    border-color: rgba(69, 168, 255, 0.38);
}

.action-btn-audio {
    background:
        linear-gradient(135deg, rgba(38, 194, 129, 0.18), rgba(8, 88, 59, 0.1)),
        rgba(7, 25, 45, 0.95);
    border-color: rgba(38, 194, 129, 0.34);
}

.action-icon {
    flex: 0 0 auto;
    width: 2.8rem;
    height: 2.8rem;
    display: grid;
    place-items: center;
    border-radius: 0.85rem;
    background: rgba(255, 255, 255, 0.1);
    font-size: 1.35rem;
    font-weight: 900;
}

.action-copy {
    display: grid;
    gap: 0.2rem;
    text-align: left;
}

.action-copy strong {
    font-size: 0.96rem;
}

.action-copy small {
    color: var(--muted);
    font-size: 0.76rem;
}

.save-vocabulary-btn,
.category-add-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 0 12px 24px rgba(29, 126, 215, 0.24);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.save-vocabulary-btn:hover,
.category-add-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 30px rgba(29, 126, 215, 0.32);
}

/* Reproducir y detener */

.premium-playlist-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
}

.playlist-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    min-height: 68px;
    padding: 0.85rem 1rem;
    border-radius: 1rem;
    font-weight: 800;
    cursor: pointer;
    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease,
        opacity 0.2s ease;
}

.playlist-btn strong,
.playlist-btn small {
    display: block;
}

.playlist-btn small {
    margin-top: 0.15rem;
    font-size: 0.72rem;
    font-weight: 600;
    opacity: 0.78;
}

.playlist-btn-icon {
    width: 2.55rem;
    height: 2.55rem;
    display: grid;
    place-items: center;
    border-radius: 0.8rem;
    background: rgba(255, 255, 255, 0.12);
    font-size: 1.05rem;
}

.playlist-btn-play {
    color: white;
    background: linear-gradient(135deg, #258cdf, #1664b7);
    border: 1px solid rgba(89, 181, 255, 0.42);
    box-shadow: 0 12px 26px rgba(29, 126, 215, 0.26);
}

.playlist-btn-stop {
    color: #ffe4e4;
    background: linear-gradient(135deg, rgba(179, 49, 62, 0.94), rgba(116, 25, 37, 0.94));
    border: 1px solid rgba(255, 107, 107, 0.42);
    box-shadow: 0 12px 26px rgba(150, 38, 50, 0.2);
}

.playlist-btn:hover:not(:disabled) {
    transform: translateY(-2px);
}

.playlist-btn:disabled {
    opacity: 0.46;
    cursor: not-allowed;
    box-shadow: none;
}

/* Eliminar elegante */

.icon-delete-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    min-height: 34px;
    padding: 0.45rem 0.72rem;
    color: #ffc8c8;
    background:
        linear-gradient(135deg, rgba(255, 107, 107, 0.16), rgba(148, 40, 51, 0.08));
    border: 1px solid rgba(255, 107, 107, 0.28);
    border-radius: 0.75rem;
    font-size: 0.75rem;
    font-weight: 800;
    cursor: pointer;
    transition:
        transform 0.18s ease,
        background 0.18s ease,
        border-color 0.18s ease;
}

.icon-delete-btn:hover {
    transform: translateY(-1px);
    color: white;
    background:
        linear-gradient(135deg, rgba(214, 62, 75, 0.86), rgba(142, 31, 43, 0.92));
    border-color: rgba(255, 137, 137, 0.48);
}

.category-row-premium {
    padding: 0.9rem 1rem;
    background:
        linear-gradient(135deg, rgba(16, 38, 66, 0.86), rgba(8, 24, 43, 0.94));
}

.category-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.category-icon {
    width: 2.7rem;
    height: 2.7rem;
    display: grid;
    place-items: center;
    border-radius: 0.85rem;
    color: var(--accent);
    background: rgba(69, 168, 255, 0.12);
    border: 1px solid rgba(69, 168, 255, 0.18);
    font-size: 1.1rem;
}

.category-delete-btn {
    min-width: 96px;
}

/* Mejoras móviles */

@media (max-width: 760px) {
    .premium-actions,
    .premium-playlist-actions {
        grid-template-columns: 1fr;
    }

    .action-btn,
    .playlist-btn {
        width: 100%;
    }

    .item-actions {
        gap: 0.55rem;
    }
}

@media (max-width: 430px) {
    .category-row-premium {
        align-items: stretch;
    }

    .category-delete-btn {
        width: 100%;
    }

    .category-row-premium form {
        width: 100%;
    }
}
/* Accesos directos entre Crear y Estudiar */

.module-shortcut {
    margin-top: 1rem;
}

.module-shortcut-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.85rem;
    width: 100%;
    min-height: 74px;
    padding: 1rem 1.2rem;

    color: var(--text);
    background:
        linear-gradient(
            135deg,
            rgba(69, 168, 255, 0.2),
            rgba(29, 126, 215, 0.08)
        ),
        rgba(11, 27, 49, 0.94);

    border: 1px solid rgba(69, 168, 255, 0.32);
    border-radius: 1rem;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.18);

    transition:
        transform 0.2s ease,
        border-color 0.2s ease,
        box-shadow 0.2s ease;
}

.module-shortcut-btn:hover {
    transform: translateY(-3px);
    border-color: rgba(69, 168, 255, 0.58);
    box-shadow: 0 17px 34px rgba(0, 0, 0, 0.26);
}

.module-shortcut-btn strong,
.module-shortcut-btn small {
    display: block;
}

.module-shortcut-btn strong {
    font-size: 1rem;
}

.module-shortcut-btn small {
    margin-top: 0.2rem;
    color: var(--muted);
    font-size: 0.78rem;
}

.module-shortcut-icon {
    flex: 0 0 auto;
    width: 2.9rem;
    height: 2.9rem;

    display: grid;
    place-items: center;

    color: white;
    background: linear-gradient(
        135deg,
        var(--accent),
        var(--accent-2)
    );

    border-radius: 0.9rem;
    font-size: 1.25rem;
    font-weight: 900;
    box-shadow: 0 8px 18px rgba(29, 126, 215, 0.28);
}

@media (max-width: 430px) {
    .module-shortcut-btn {
        justify-content: flex-start;
        text-align: left;
    }
}

.voice-control {
    grid-column: 1 / -1;
}

.voice-help {
    margin-top: 0.25rem;
    color: var(--muted);
    font-size: 0.76rem;
}

@media (max-width: 760px) {
    .voice-control {
        grid-column: auto;
    }
}