/* ============================================
   LAYOUT.CSS — App shell, header, nav, screens
   ============================================ */

.app-container {
    width: 100%;
    max-width: 100% !important;
    margin: 0;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    background: var(--bg-0);
    position: relative;
    border-radius: 0;
    box-shadow: none;
}

/* ---- Header ---- */
.app-header {
    position: sticky;
    top: 0;
    z-index: 200;
    height: var(--header-h);
    display: flex;
    align-items: center;
    padding: 0 var(--sp-lg);
    background: rgba(10,10,10,0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    transition: opacity 0.3s, height 0.3s;
    width: 100%;
}

body.light-mode .app-header {
    background: rgba(242,242,247,0.85);
}

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

.header-logo-section {
    display: flex;
    align-items: center;
    gap: var(--sp-sm);
}

.header-logo {
    width: 28px;
    height: 28px;
    cursor: pointer;
}

.header-subtitle {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-3);
}

.header-buttons {
    display: flex;
    gap: var(--sp-sm);
}

.header-icon-btn {
    background: var(--bg-2);
    border: 1px solid var(--border);
    width: 40px;
    height: 40px;
    border-radius: var(--r-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-1);
    transition: background 0.2s, transform 0.2s;
}

.header-icon-btn:hover  { background: var(--bg-3); transform: translateY(-1px); }
.header-icon-btn:active { transform: scale(0.92); }

.header-icon-btn img {
    width: 20px;
    height: 20px;
}

/* ---- Main content ---- */
.main-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding-bottom: var(--nav-h);
    scrollbar-width: none;
    width: 100%;
}

.main-content::-webkit-scrollbar { display: none; }

/* ---- Screens ---- */
.screen {
    display: none;
    animation: fadeUp 0.3s ease-out both;
}

.screen.active {
    display: block !important;
}

#screen-home.active {
    display: flex !important;
    flex-direction: column;
    min-height: calc(100dvh - var(--nav-h));
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

.screen-content {
    padding: var(--sp-lg);
    padding-bottom: var(--sp-xl);
}

/* ---- Bottom nav ---- */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    max-width: 100% !important;
    height: var(--nav-h);
    background: rgba(10,10,10,0.90);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--border);
    z-index: 300;
}

body.light-mode .bottom-nav {
    background: rgba(242,242,247,0.90);
}

body.hide-bottom-nav .bottom-nav {
    display: none;
}

.nav-content {
    display: flex;
    height: 100%;
    align-items: center;
    justify-content: space-around;
    padding: 0 var(--sp-sm);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    background: none;
    border: none;
    color: var(--text-3);
    cursor: pointer;
    transition: color 0.2s;
    padding: var(--sp-sm) var(--sp-md);
    border-radius: var(--r-md);
}

.nav-item.active { color: var(--text-1); }
.nav-item:active { opacity: 0.7; }

.nav-icon img {
    width: 22px;
    height: 22px;
}

.nav-label {
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: inherit;
}