.header {
    flex-shrink: 0; width: 100%;
    position: relative;
    display: flex; align-items: center;
    padding: 5px 25px;
    padding-top: calc(5px + var(--safe-area-top, env(safe-area-inset-top, 0px)));
    background: rgba(5, 11, 20, 0.3);
    backdrop-filter: blur(20px);
    z-index: 20000;
    border-bottom: 1px solid rgba(0, 242, 255, 0.1);
    box-sizing: border-box;
}

.header-left {
    display: flex; align-items: center; gap: 10px;
    flex-shrink: 0;
}

.header-center {
    flex: 1; min-width: 0; padding-left: 5px;
}

.header-center h2 {
    font-size: 20px; font-weight: 700;
    background: linear-gradient(to right, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 20px rgba(0, 242, 255, 0.3);
    margin: 0; letter-spacing: 1px;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.header-right {
    display: flex; align-items: center; gap: 10px;
    flex-shrink: 0;
}

.icon-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 12px;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: 0.3s;
    color: var(--primary);
}
.icon-btn:hover {
    background: rgba(0, 242, 255, 0.1);
    box-shadow: 0 0 15px var(--primary);
    color: White;
}

#fullscreen-btn {
    background: rgba(0, 242, 255, 0.05);
    border: 1px solid rgba(0, 242, 255, 0.2);
    color: var(--primary);
    border-radius: 8px;
    cursor: pointer;
    transition: 0.3s all ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

#fullscreen-btn:hover {
    background: var(--primary);
    color: var(--bg-main);
    box-shadow: 0 0 15px var(--primary);
}

.win-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px;
    width: 36px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: 0.2s;
    color: var(--text-secondary);
    font-size: 12px;
}

.win-btn-max:hover {
    background: #00f2ff;
    color: #050b14;
    box-shadow: 0 0 12px rgba(0, 242, 255, 0.5);
}

.win-btn-min:hover {
    background: #ffb800;
    color: #050b14;
    box-shadow: 0 0 12px rgba(255, 184, 0, 0.5);
}

.win-btn-fs:hover {
    background: #00ff88;
    color: #050b14;
    box-shadow: 0 0 12px rgba(0, 255, 136, 0.5);
}

.win-btn-close:hover {
    background: #e81123;
    color: #fff;
}

.info-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 12px;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: 0.3s;
    color: var(--primary);
}
.info-btn svg {
    width: 22px;
    height: 22px;
    fill: var(--primary);
}
.info-btn:hover {
    background: rgba(0, 242, 255, 0.1);
    box-shadow: 0 0 15px var(--primary);
}

.download-btn {
    background: transparent;
    color: var(--primary);
    padding: 5px 12px;
    border-radius: 8px;
    border: 1px solid var(--primary);
    font-weight: 600;
    font-size: 13px;
    font-family: 'Fira Code', 'Cairo', monospace;
    cursor: pointer;
    transition: 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
    text-transform: uppercase;
    white-space: nowrap;
}
.download-btn:hover {
    background: var(--primary);
    color: #000;
    box-shadow: 0 0 20px rgba(0, 242, 255, 0.4);
}

.icon-btn:disabled {
    opacity: 0.5; cursor: default;
}
.icon-btn:disabled:hover {
    background: rgba(255, 255, 255, 0.05);
    box-shadow: none; color: var(--primary);
}

.btn-spinner {
    width: 16px; height: 16px;
    border: 2px solid rgba(0,242,255,0.2);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: header-spin 0.7s linear infinite;
}

@keyframes header-spin {
    to { transform: rotate(360deg); }
}

.back-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 10px;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: 0.3s;
    color: var(--text-secondary);
    font-size: 14px;
}
.back-btn:hover {
    background: rgba(0, 242, 255, 0.1);
    color: var(--primary);
    box-shadow: 0 0 15px var(--primary);
}